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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



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FORM 10-Q



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(Mark One)

|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the quarterly period ended March 31, 2007

OR



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

Commission file number: 000-51349



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Advanced Analogic Technologies Incorporated

(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)



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|                                                               |  |                                        
|-------------------------------------------------------------- |  | ---------------------------------------
|Delaware                                                       |  | 77-0462930                             
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification Number)



|                                           |  |           
|------------------------------------------ |  | ----------
|830 East Arques Ave, Sunnyvale, California |  | 94085     
|(Address of principal executive offices)   |  | (Zip Code)

Registrants telephone number, including area code:

(408) 737-4600



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Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No ̈

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2 of
the Exchange Act. (Check one):

Large accelerated filer ̈Accelerated filer  x    Non-accelerated filer ̈

Indicate by check mark whether the registrant is a shell company (as defined
in Rule 12b-2 of the Exchange Act).    Yes ̈No  x

There were 44,571,753 shares of the Registrants common stock issued and outstanding as of April 30, 2007.



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##### Table of Contents

ADVANCED ANALOGIC TECHNOLOGIES, INCORPORATED

TABLE OF CONTENTS



|                              |  |                                                                                       |  |                                                                                                              |  |  
|----------------------------- |  | ------------------------------------------------------------------------------------- |  | ------------------------------------------------------------------------------------------------------------ |  | -
|                              |  |                                                                                       |  | PAGE                                                                                                        
|                              | 
|PART I. FINANCIAL INFORMATION |  |                                                                                      
|                              |  |                                                                                      
|ITEM 1.                       |  | FINANCIAL STATEMENTS (UNAUDITED)                                                      |  | 3                                                                                                           
|                              |  |                                                                                       | 
|                              |  |                                                                                       |  | CONDENSED CONSOLIDATED BALANCE SHEETS AT MARCH 31, 2007 AND DECEMBER 31, 2006                                |  | 3
|                              |  |                                                                                       | 
|                              |  |                                                                                       |  | CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS FOR THE THREE MONTHS ENDED MARCH 31, 2007 AND MARCH 31, 2006 |  | 4
|                              |  |                                                                                       | 
|                              |  |                                                                                       |  | CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS FOR THE THREE MONTHS ENDED MARCH 31, 2007 AND MARCH 31, 2006 |  | 5
|                              |  |                                                                                       | 
|                              |  |                                                                                       |  | NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS                                                         |  | 6
|                              |  |                                                                                      
|ITEM 2.                       |  | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS |  | 14                                                                                                          
|                              |  |                                                                                      
|ITEM 3.                       |  | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK                            |  | 23                                                                                                          
|                              |  |                                                                                      
|ITEM 4.                       |  | CONTROLS AND PROCEDURES                                                               |  | 23                                                                                                          
|                              | 
|PART II. OTHER INFORMATION    |  |                                                                                      
|                              |  |                                                                                      
|ITEM 1.                       |  | LEGAL PROCEEDINGS                                                                     |  | 24                                                                                                          
|                              |  |                                                                                      
|ITEM 1A.                      |  | RISK FACTORS                                                                          |  | 24                                                                                                          
|                              |  |                                                                                      
|ITEM 2.                       |  | UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS                           |  | 36                                                                                                          
|                              |  |                                                                                      
|ITEM 3.                       |  | DEFAULTS UPON SENIOR SECURITIES                                                       |  | 36                                                                                                          
|                              |  |                                                                                      
|ITEM 4.                       |  | SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS                                   |  | 36                                                                                                          
|                              |  |                                                                                      
|ITEM 5.                       |  | OTHER INFORMATION                                                                     |  | 36                                                                                                          
|                              |  |                                                                                      
|ITEM 6.                       |  | EXHIBITS                                                                              |  | 37                                                                                                          



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##### Table of Contents

PART I. FINANCIAL INFORMATION



|ITEM 1. | FINANCIAL STATEMENTS
|------- | --------------------

ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands, except share and
par value)



|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | ------------- | ------- | - | -------------------- | - | ------- | -
|                                                                                                                                                                               |  | March 31,2007 |         |   | December 31,2006 (*) |  
|ASSETS                                                                                                                                                                         |  |               |         |   |                      |   |         |  
|CURRENT ASSETS                                                                                                                                                                 |  |               |         |   |                      |   |         |  
|Cash and cash equivalents                                                                                                                                                      |  | $             | 57,839  |   |                      | $ | 58,121  |  
|Short-term investments                                                                                                                                                         |  |               | 49,914  |   |                      |   | 49,566  |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|Total cash, cash equivalents and short-term investments                                                                                                                        |  |               | 107,753 |   |                      |   | 107,687 |  
|Accounts receivable, net                                                                                                                                                       |  |               | 11,748  |   |                      |   | 11,037  |  
|Inventories                                                                                                                                                                    |  |               | 8,623   |   |                      |   | 8,480   |  
|Prepaid expenses and other current assets                                                                                                                                      |  |               | 1,948   |   |                      |   | 2,223   |  
|Restricted cash                                                                                                                                                                |  |               | 700     |   |                      |   | 700     |  
|Deferred income taxes                                                                                                                                                          |  |               | 855     |   |                      |   | 857     |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|Total current assets                                                                                                                                                           |  |               | 131,627 |   |                      |   | 130,984 |  
|                                                                                                                                                                               |  |              
|PROPERTY AND EQUIPMENTNET                                                                                                                                                     |  |               | 3,233   |   |                      |   | 2,812   |  
|OTHER ASSETS                                                                                                                                                                   |  |               | 1,436   |   |                      |   | 1,375   |  
|DEFERRED INCOME TAXES                                                                                                                                                          |  |               | 7,680   |   |                      |   | 5,965   |  
|INTANGIBLESNET                                                                                                                                                                |  |               | 2,997   |   |                      |   | 3,287   |  
|GOODWILL                                                                                                                                                                       |  |               | 16,792  |   |                      |   | 16,775  |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|TOTAL ASSETS                                                                                                                                                                   |  | $             | 163,765 |   |                      | $ | 161,198 |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|                                                                                                                                                                               |  |              
|LIABILITIES AND STOCKHOLDERS EQUITY                                                                                                                                           |  |               |         |   |                      |   |         |  
|CURRENT LIABILITIES                                                                                                                                                            |  |               |         |   |                      |   |         |  
|Accounts payable                                                                                                                                                               |  | $             | 9,853   |   |                      | $ | 6,968   |  
|Accrued liabilities                                                                                                                                                            |  |               | 5,159   |   |                      |   | 6,714   |  
|Income tax payable                                                                                                                                                             |  |               | 305     |   |                      |   | 1,250   |  
|Current portion of capital lease obligations                                                                                                                                   |  |               | 141     |   |                      |   | 138     |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|Total current liabilities                                                                                                                                                      |  |               | 15,458  |   |                      |   | 15,070  |  
|                                                                                                                                                                               |  |              
|Long-term income tax payable                                                                                                                                                   |  |               | 2,212   |   |                      |   |        |  
|Long-term capital lease obligations                                                                                                                                            |  |               | 155     |   |                      |   | 191     |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|Total liabilities                                                                                                                                                              |  |               | 17,825  |   |                      |   | 15,261  |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|                                                                                                                                                                               |  |              
|STOCKHOLDERS EQUITY:                                                                                                                                                          |  |               |         |   |                      |   |         |  
|Common stock, $0.001 par value100,000,000 shares authorized; 44,561,653 and 44,064,729 shares issued and outstanding as of
March 31, 2007 and December 31, 2006, respectively |  |               | 44      |   |                      |   | 44      |  
|Additional paid-in capital                                                                                                                                                     |  |               | 161,517 |   |                      |   | 160,088 |  
|Deferred stock-based compensation                                                                                                                                              |  |               | (2,388  | ) |                      |   | (2,935  | )
|Accumulated other comprehensive loss                                                                                                                                           |  |               | (245    | ) |                      |   | (480    | )
|Accumulated deficit                                                                                                                                                            |  |               | (12,988 | ) |                      |   | (10,780 | )
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|Total stockholders equity                                                                                                                                                     |  |               | 145,940 |   |                      |   | 145,937 |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  
|TOTAL LIABILITIES AND STOCKHOLDERS EQUITY                                                                                                                                     |  | $             | 163,765 |   |                      | $ | 161,198 |  
|                                                                                                                                                                               |  |               |         |   |                      |   |         |  

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|* | Amounts as of December 31, 2006 were derived from the December 31, 2006 audited financial statements.
|- | -----------------------------------------------------------------------------------------------------

See accompanying notes to condensed consolidated financial statements.



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##### Table of Contents

ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands, except per share
amount)



|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|---------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ---------------------------- | ------ | - | ---- | - | ------ | -
|                                                                                                                                                           |  | Three Months Ended March 31, |       
|                                                                                                                                                           |  | 2007                         |        |   | 2006 |  
|NET REVENUE                                                                                                                                                |  | $                            | 21,108 |   |      | $ | 18,289 |  
|Cost of revenues (including stock-based compensation of $65 and $87 for the three months ended March 31, 2007 and 2006, respectively)                      |  |                              | 9,932  |   |      |   | 7,134  |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|GROSS PROFIT                                                                                                                                               |  |                              | 11,176 |   |      |   | 11,155 |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|                                                                                                                                                           |  |                             
|OPERATING EXPENSES:                                                                                                                                        |  |                              |        |   |      |   |        |  
|Research and development (including stock-based compensation of $611 and $557 for the three months ended March 31, 2007 and 2006, respectively)            |  |                              | 7,103  |   |      |   | 6,055  |  
|Sales, general and administrative (including stock-based compensation of $1,034 and $762 for the three months ended March 31, 2007 and 2006, respectively) |  |                              | 6,202  |   |      |   | 5,173  |  
|Patent litigation                                                                                                                                          |  |                              | 1,589  |   |      |   | 383    |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|Total operating expenses                                                                                                                                   |  |                              | 14,894 |   |      |   | 11,611 |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|                                                                                                                                                           |  |                             
|LOSS FROM OPERATIONS                                                                                                                                       |  |                              | (3,718 | ) |      |   | (456   | )
|INTEREST AND OTHER INCOME (EXPENSES):                                                                                                                      |  |                              |        |   |      |   |        |  
|Interest income                                                                                                                                            |  |                              | 1,369  |   |      |   | 1,234  |  
|Interest expense and other income (expense)                                                                                                                |  |                              | (271   | ) |      |   | 14     |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|Total interest and other income (expense), net                                                                                                             |  |                              | 1,098  |   |      |   | 1,248  |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|                                                                                                                                                           |  |                             
|INCOME (LOSS) BEFORE INCOME TAXES                                                                                                                          |  |                              | (2,620 | ) |      |   | 792    |  
|PROVISION FOR INCOME TAXES                                                                                                                                 |  |                              | 131    |   |      |   | 46     |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|                                                                                                                                                           |  |                             
|NET INCOME (LOSS)                                                                                                                                          |  | $                            | (2,751 | ) |      |   | 746    |  
|                                                                                                                                                           |  |                              |        |   |      |   |        |  
|                                                                                                                                                           |  |                             
|NET INCOME (LOSS) PER SHARE:                                                                                                                               |  |                              |        |   |      |   |        |  
|Basic                                                                                                                                                      |  | $                            | (0.06  | ) |      | $ | 0.02   |  
|Diluted                                                                                                                                                    |  | $                            | (0.06  | ) |      | $ | 0.02   |  
|WEIGHTED AVERAGE SHARES USED IN NET INCOME (LOSS) PER SHARE CALCULATION:                                                                                   |  |                              |        |   |      |   |        |  
|Basic                                                                                                                                                      |  |                              | 44,319 |   |      |   | 42,994 |  
|Diluted                                                                                                                                                    |  |                              | 44,319 |   |      |   | 46,927 |  

See accompanying notes to condensed consolidated financial statements.



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ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in thousands)



|                                                                                                              |  |                              |         |   |      |   |         |  
|------------------------------------------------------------------------------------------------------------- |  | ---------------------------- | ------- | - | ---- | - | ------- | -
|                                                                                                              |  | Three Months Ended March 31, |        
|                                                                                                              |  | 2007                         |         |   | 2006 |  
|CASH FLOWS FROM OPERATING ACTIVITIES:                                                                         |  |                              |         |   |      |   |         |  
|Net income (loss)                                                                                             |  | $                            | (2,751  | ) |      | $ | 746     |  
|Adjustments to reconcile net income (loss) to net cash provided by operating activities:                      |  |                              |         |   |      |   |         |  
|Depreciation and amortization                                                                                 |  |                              | 700     |   |      |   | 383     |  
|Stock-based compensation                                                                                      |  |                              | 1,710   |   |      |   | 1,406   |  
|Excess tax benefit from share based payment awards                                                            |  |                              |        |   |      |   | (447    | )
|Change in prior year tax positions due to adoption of FIN 48                                                  |  |                              | 543     |   |      |   |        |  
|Provision for doubtful accounts                                                                               |  |                              | (4      | ) |      |   |        |  
|Loss on disposal of plant, property and equipment                                                             |  |                              | 1       |   |      |   |        |  
|Loss on liquidation of a foreign branch office                                                                |  |                              | 266     |   |      |   |        |  
|Changes in operating assets and liabilities:                                                                  |  |                              |         |   |      |   |         |  
|Accounts receivable                                                                                           |  |                              | (706    | ) |      |   | (560    | )
|Inventory                                                                                                     |  |                              | (138    | ) |      |   | (189    | )
|Prepaid expenses and other current assets                                                                     |  |                              | 287     |   |      |   | 124     |  
|Other assets                                                                                                  |  |                              | (63     | ) |      |   | (19     | )
|Deferred income taxes                                                                                         |  |                              | (1,715  | ) |      |   | (842    | )
|Accounts payable                                                                                              |  |                              | 2,987   |   |      |   | 724     |  
|Accrued expenses                                                                                              |  |                              | (1,589  | ) |      |   | (943    | )
|Other long term liabilities                                                                                   |  |                              |        |   |      |   | (9      | )
|Income taxes payable                                                                                          |  |                              | 1,267   |   |      |   | (177    | )
|                                                                                                              |  |                              |         |   |      |   |         |  
|Net cash provided by operating activities                                                                     |  |                              | 795     |   |      |   | 197     |  
|                                                                                                              |  |                              |         |   |      |   |         |  
|                                                                                                              |  |                             
|CASH FLOWS FROM INVESTING ACTIVITIES:                                                                         |  |                              |         |   |      |   |         |  
|Purchases of plant, property and equipment                                                                    |  |                              | (919    | ) |      |   | (571    | )
|Purchases of short-term investments                                                                           |  |                              | (13,341 | ) |      |   |        |  
|Proceeds from sales and maturities of short-term investments                                                  |  |                              | 13,000  |   |      |   |        |  
|                                                                                                              |  |                              |         |   |      |   |         |  
|Net cash used in investing activities                                                                         |  |                              | (1,260  | ) |      |   | (571    | )
|                                                                                                              |  |                              |         |   |      |   |         |  
|                                                                                                              |  |                             
|CASH FLOWS FROM FINANCING ACTIVITIES:                                                                         |  |                              |         |   |      |   |         |  
|Proceeds from exercise of common stock options and common stock warrants                                      |  |                              | 260     |   |      |   | 434     |  
|Tax benefit from equity transactions                                                                          |  |                              |        |   |      |   | 1,276   |  
|Principal payments on capital lease obligations                                                               |  |                              | (33     | ) |      |   |        |  
|                                                                                                              |  |                              |         |   |      |   |         |  
|Net cash provided by financing activities                                                                     |  |                              | 227     |   |      |   | 1,710   |  
|                                                                                                              |  |                              |         |   |      |   |         |  
|EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS                                                  |  |                              | (44     | ) |      |   | (3      | )
|                                                                                                              |  |                              |         |   |      |   |         |  
|NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                                          |  |                              | (282    | ) |      |   | 1,333   |  
|CASH AND CASH EQUIVALENTSBeginning of period                                                                 |  |                              | 58,121  |   |      |   | 124,377 |  
|                                                                                                              |  |                              |         |   |      |   |         |  
|CASH AND CASH EQUIVALENTSEnd of period                                                                       |  | $                            | 57,839  |   |      | $ | 125,710 |  
|                                                                                                              |  |                              |         |   |      |   |         |  
|                                                                                                              |  |                             
|SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:                                                             |  |                              |         |   |      |   |         |  
|Increases (decreases) in accounts payable and accrued liabilities related to property and equipment purchases |  | $                            | (87     | ) |      |   |        |  
|Cash paid for interest                                                                                        |  | $                            | 9       |   |      |   | 1       |  
|Cash paid for income taxes                                                                                    |  | $                            | 37      |   |      |   | 237     |  

See accompanying notes to condensed consolidated financial statements.



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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. BASIS OF PRESENTATION

The accompanying unaudited
consolidated financial statements of Advanced Analogic Technologies Incorporated (the Company) have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the SEC). Certain
information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted in accordance with these rules and regulations. The
information in this report should be read in conjunction with the Companys audited consolidated financial statements and notes thereto included in its Registration Statement on Form 10-K filed with the SEC on March 8, 2007.

In the opinion of management, the accompanying unaudited consolidated financial statements reflect all adjustments (consisting only of normal recurring
adjustments) necessary to summarize fairly the Companys financial position, results of operations and cash flows for the interim periods presented. The operating results for the three months ended March 31, 2007 are not necessarily
indicative of the results that may be expected for the year ending December 31, 2007 or for any other future period. The consolidated balance sheet as of December 31, 2006 is derived from the audited consolidated financial statements as of
and for the year then ended.

Cash and Cash Equivalents

Cash equivalents are highly liquid investments purchased with original maturities of 90 days or less at the time of purchase. Investments with maturities of over 90 days at the time of purchase are classified as
short-term investments.

Investments

The Company accounts for its investment instruments in accordance with Statement of Financial Accounting Standards (SFAS) No. 115, Accounting for Certain Investments in Debt and Equity Securities (SFAS
115). At March 31, 2007, the Company had investments in short-term debt instruments which were classified as available-for-sale under SFAS 115. Short-term investments consist primarily of high grade debt securities with a maturity of
greater than 90 days when purchased. The Company classifies investments with maturities greater than one year as short-term investments as it considers all investments a potential source of operating cash regardless of maturity date. The
Companys debt securities are carried at fair market value with the related unrealized gains and losses included in accumulated other comprehensive loss, which is a separate component of stockholders equity. The cost of securities sold is
based on specific identification method. Interest earned on securities is included in Interest income in the Condensed Consolidated Statements of Operations. The fair value of investments is determined using quoted market prices for
those securities.

In addition to debt securities, a portion of the Companys investment portfolio consists of an equity investment in
a non-publicly traded company. The Company has classified this investment as long-term other assets. This investment is carried at cost and evaluated for other than temporary impairment at each reporting period.



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2. RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS

FIN 48

On July 13, 2006,
the FASB issued Interpretation No. 48, Accounting for Uncertainty in Income Taxes  An Interpretation of FASB Statement No. 109 (FIN 48). FIN 48 clarifies the accounting for uncertainty in income taxes
recognized in an entitys financial statements in accordance with FASB Statement No. 109, Accounting for Income Taxes and prescribes a recognition threshold and measurement attributes for financial statement disclosure of tax
positions taken or expected to be taken on a tax return. Under FIN 48, the impact of an uncertain income tax position on the income tax return must be recognized at the largest amount that is more likely than not to be sustained upon audit by the
relevant taxing authority. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. Additionally, FIN 48 provides guidance on derecognition, classification, interest and penalties, accounting
in interim periods, disclosure and transition. FIN 48 is effective for fiscal years beginning after December 15, 2006.

The Company
adopted the provisions of FIN 48 on January 1, 2007. The total amount of unrecognized tax benefits as of the date of adoption was approximately $2,417,000. If such unrecognized tax benefits are recognized, the effective tax rate would be
affected. As a result of the implementation of FIN 48, the Company recognized approximately $550,000 of a net decrease in the liability for unrecognized tax benefits which was accounted for as follows:



|                                                  |  |   |          |  
|------------------------------------------------- |  | - | -------- | -
|Increase in Retained Earnings (cumulative effect) |  | $ | 848,000  |  
|Decrease in Retained Earnings (cumulative effect) |  | $ | (305,000 | )
|Reduction in Deferred Tax Assets                  |  | $ | 7,000    |  
|                                                  |  |   |          |  
|Decrease in Liability                             |  | $ | 550,000  |  
|                                                  |  |   |          |  

The Company recognizes interest and penalties accrued related to unrecognized tax benefits in
income tax expense. During the year ended December 31, 2006, the Company recognized approximately $16,000 in penalties and interest. During the years ended December 31, 2005 and 2004, no penalties and interest were recognized. There had
been no payment of interest and penalties accrued at December 31, 2006. Upon adoption of FIN 48 on January 1, 2007, the Company increased its accrual for interest and penalties to approximately $95,000.

The Company is subject to taxation in the United States and various states and foreign jurisdictions. The Companys tax years for 1997 through 2004
are subject to examination by the tax authorities. Currently, an estimate of the range of the reasonably possible change in unrecognized tax benefits in the next 12 months cannot be made. The Company is no longer subject to foreign examinations by
tax authorities for years before 2001.

SFAS 159

In February 2007, the FASB issued SFAS No. 159, The Fair Value Option for Financial Assets and Financial Liabilities (SFAS
159), which permits entities to choose to measure many financial instruments and certain other items at fair value. The objective is to improve financial reporting by providing entities with the opportunity to mitigate volatility in reported
earnings caused by measuring related assets and liabilities differently without having to apply complex hedge accounting provisions. SFAS 159 applies to all entities and is effective for fiscal years beginning after November 15, 2007. The
Company does not believe SFAS 159 will have any material impact on its financial statements.

3. STOCK-BASED COMPENSATION

On January 1, 2006, the Company adopted SFAS No. 123 (revised 2004), Share-Based Payment, (SFAS 123(R)), which requires
the measurement and recognition of compensation expense for all share-based payment awards made to employees and directors including employee stock options and employee stock purchases related to the Employee Stock Purchase Plan based on estimated
fair values.



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##### Table of Contents

The following table summarizes stock-based compensation expense related to employee stock options under
SFAS 123(R), including the amortization of the intrinsic value under Accounting Principles Board Opinion 25, Accounting for Stock Issued to Employees, for pre-April 4, 2005 options, for the three months ended March 31, 2007 and
March 31, 2006, which was allocated as follows:



|                                       |  |                    |       |   |      |   |       |  
|-------------------------------------- |  | ------------------ | ----- | - | ---- | - | ----- | -
|                                       |  | Three Months Ended |      
|                                       |  | March 31,          |      
|                                       |  | 2007               |       |   | 2006 |  
|                                       |  | (in thousands)     |      
|Cost of sales                          |  | $                  | 65    |   |      | $ | 87    |  
|Research and development               |  |                    | 611   |   |      |   | 557   |  
|Sales, general and marketing           |  |                    | 1,034 |   |      |   | 762   |  
|                                       |  |                   
|Related tax effect                     |  |                    | (377  | ) |      |   | (91   | )
|                                       |  |                    |       |   |      |   |       |  
|                                       |  |                   
|Total stock-based compensation expense |  | $                  | 1,333 |   |      | $ | 1,315 |  
|                                       |  |                    |       |   |      |   |       |  

On January 17, 2007, the Company accepted for exchange from eligible employees (excluding
directors and Section 16 officers), options to purchase an aggregate of approximately 1.3 million shares of the Companys common stock, pursuant to a stock option exchange program (the Exchange Offer) under Section 16 of
the Securities Exchange Act of 1934, giving them the right to tender outstanding stock options that were granted between August 4, 2005 and September 1, 2006 (the Old Options). The Old Options were cancelled as of
January 17, 2007. The Company granted new options to purchase an equal number of shares of its common stock with an exercise price at fair market value of $5.80 in exchange for the options cancelled in connection with the offer. These new
options vest at the rate of 25 percent after one year starting from January 17, 2007 and 6.25 percent every three months thereafter. The Company calculated incremental compensation costs related to the Exchange Offer as required by SFAS 123(R),
which together with the unamortized costs related to the Old Options, will be amortized over the vesting period of the new options.

For
options granted subsequent to January 1, 2006, including the new options granted as a result of the Exchange Offer, the Company estimated expected volatility for options granted relying on a combination of historical and market-based implied
volatility in accordance with guidance in SFAS 123(R) and Staff Accounting Bulletin No. 107. The Company determined that a combination of implied volatility and historical volatility is more reflective of market conditions and a better
indicator of expected volatility than using purely historical volatility. The expected term of employee stock options represents the weighted-average period that the stock options are expected to remain outstanding. The Company derived the expected
term assumption based on the Company and its peer groups weighted average vesting period combined with the post-vesting holding period. The risk-free interest rate assumption is based upon observed interest rates appropriate for the expected
term of the Companys employee stock options. The dividend yield assumption is based on the Companys history and expectation of dividend payouts. The Company has never declared or paid any cash dividends on common stock, and it does not
anticipate paying any cash dividends in the foreseeable future.

The following table includes the weighted average assumptions utilized for
purposes of calculating the valuation of the Companys stock option grants for the three months ended March 31, 2007 and March 31, 2006:



|                        |  |                             |   |  |      |  
|----------------------- |  | --------------------------- | - |  | ---- | -
|                        |  | Three Months EndedMarch 31, |  
|                        |  | 2007                        |   |  | 2006 |  
|Volatility              |  | 50                          | % |  | 56   | %
|Expected option term    |  | 4.25                        |   |  | 6.25 |  
|Expected dividend yield |  | 0                           | % |  | 0    | %
|Risk free interest rate |  | 4.50                        | % |  | 4.55 | %



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##### Table of Contents

4. NET INCOME (LOSS) PER SHARE

The Company calculates net income (loss) per share in accordance with SFAS No. 128, Earnings Per Share (SFAS 128). Under SFAS 128, basic net income (loss) per common share is calculated by
dividing net income (loss) by the weighted-average number of common shares outstanding during the reporting period excluding shares subject to repurchase. Diluted net income (loss) per common share reflects the effects of potentially dilutive
securities, which consist of convertible preferred stock and common stock options and warrants, common stock subject to repurchase and preferred stock warrants. Basic and diluted net loss per share are the same for the three months ended
March 31, 2007 due to the Companys loss for that period. Approximately two million shares of dilutive potential common shares were excluded from the net loss per share calculation, as their inclusion would have been antidilutive.

A reconciliation of shares used in the calculation of basic and diluted net income (loss) per share is as follows:



|                                                              |  |                              |   |  |        |  
|------------------------------------------------------------- |  | ---------------------------- | - |  | ------ | -
|                                                              |  | Three Months Ended March 31, |  
|                                                              |  | 2007                         |   |  | 2006   |  
|                                                              |  | (in thousands)               |  
|Weighted average common shares outstanding                    |  | 44,395                       |   |  | 43,403 |  
|Weighted average shares subject to repurchase                 |  | (76                          | ) |  | (409   | )
|                                                              |  |                              |   |  |        |  
|                                                              |  |                             
|Shares used to calculate basic net income (loss) per share    |  | 44,319                       |   |  | 42,994 |  
|                                                              |  |                              |   |  |        |  
|                                                              |  |                             
|Effect of dilutive securities:                                |  |                              |   |  |        |  
|Common and preferred stock warrants                           |  |                             |   |  | 14     |  
|                                                              |  |                             
|Common stock options                                          |  |                             |   |  | 3,510  |  
|Weighted average shares subject to repurchase                 |  |                             |   |  | 409    |  
|                                                              |  |                              |   |  |        |  
|                                                              |  |                             
|Dilutive potential common stock                               |  |                             |   |  | 3,933  |  
|                                                              |  |                              |   |  |        |  
|                                                              |  |                             
|Weighted average common shares outstanding, assuming dilution |  | 44,319                       |   |  | 46,927 |  
|                                                              |  |                              |   |  |        |  

5. OTHER COMPREHENSIVE INCOME (LOSS)

Comprehensive income (loss) includes charges or credits to equity that are not the result of transactions with owners. The components of comprehensive
income (loss), net of taxes, are as follows:



|                                                                 |  |                              |        |   |      |   |    
|---------------------------------------------------------------- |  | ---------------------------- | ------ | - | ---- | - | ---
|                                                                 |  | Three Months Ended March 31,
|                                                                 |  | 2007                         |        |   | 2006
|                                                                 |  | (in thousands)              
|Net income (loss)                                                |  | $                            | (2,623 | ) |      | $ | 746
|Changes in cumulative translation adjustment                     |  |                              | 230    |   |      |   | 4  
|Changes in unrealized gains /losses on investments, net of taxes |  |                              | 5      |   |      |   |   
|                                                                 |  |                              |        |   |      |   |    
|Total other comprehensive income (loss)                          |  | $                            | (2,388 | ) |      | $ | 750
|                                                                 |  |                              |        |   |      |   |    

The changes in cumulative translation adjustment during the first quarter of 2007 included a
write-off of $0.3 million cumulative translation adjustment loss as a result of the liquidation of the Companys Sweden branch office.



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##### Table of Contents

6. DETAILS OF CERTAIN BALANCE SHEET COMPONENTS



|                                          |  |                |        |   |                  |   |        |  
|----------------------------------------- |  | -------------- | ------ | - | ---------------- | - | ------ | -
|                                          |  | March 31,2007  |        |   | December 31,2006 |  
|                                          |  | (in thousands) |       
|Work in process                           |  | $              | 5,727  |   |                  | $ | 5,748  |  
|Finished goods                            |  |                | 2,896  |   |                  |   | 2,732  |  
|                                          |  |                |        |   |                  |   |        |  
|Total inventories                         |  | $              | 8,623  |   |                  | $ | 8,480  |  
|                                          |  |                |        |   |                  |   |        |  
|                                          |  |               
|Computers and software                    |  | $              | 4,433  |   |                  | $ | 4,183  |  
|Office and test equipment                 |  |                | 3,925  |   |                  |   | 3,622  |  
|Leasehold improvements                    |  |                | 852    |   |                  |   | 589    |  
|                                          |  |                |        |   |                  |   |        |  
|                                          |  |                | 9,210  |   |                  |   | 8,394  |  
|                                          |  |               
|Accumulated depreciation and amortization |  |                | (5,977 | ) |                  |   | (5,582 | )
|                                          |  |                |        |   |                  |   |        |  
|Total property and equipment, net         |  | $              | 3,233  |   |                  | $ | 2,812  |  
|                                          |  |                |        |   |                  |   |        |  
|                                          |  |               
|Accrued payroll and benefits              |  | $              | 2,337  |   |                  | $ | 2,381  |  
|Deferred revenue                          |  |                | 569    |   |                  |   | 1,063  |  
|Accrued legal and accounting services     |  |                | 919    |   |                  |   | 818    |  
|Warranty reserve                          |  |                | 95     |   |                  |   | 204    |  
|Accrued payables and other                |  |                | 1,239  |   |                  |   | 2,248  |  
|                                          |  |                |        |   |                  |   |        |  
|Total accrued liabilities                 |  | $              | 5,159  |   |                  | $ | 6,714  |  
|                                          |  |                |        |   |                  |   |        |  



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##### Table of Contents

7. SEGMENT INFORMATION

As defined by the requirements of SFAS No. 131, Disclosures About Segments of an Enterprise and Related Information, the Company operates in one reportable segment: the design, development, marketing
and sale of power management semiconductor products and solutions for the communications, computing and consumer portable and personal electronics marketplace. The Companys chief operating decision maker is its chief executive officer.

The following is a summary of revenue by geographic region based on the location to which the product is shipped:



|                                          |  |                              |        |      |   |       
|----------------------------------------- |  | ---------------------------- | ------ | ---- | - | ------
|                                          |  | Three Months Ended March 31,
|                                          |  | 2007                         |        | 2006
|                                          |  | (in thousands)              
|South Korea                               |  | $                            | 11,592 |      | $ | 11,622
|Taiwan                                    |  |                              | 3,018  |      |   | 3,328 
|China                                     |  |                              | 5,226  |      |   | 2,121 
|Europe                                    |  |                              | 550    |      |   | 741   
|Japan                                     |  |                              | 147    |      |   | 175   
|North America (principally United States) |  |                              | 575    |      |   | 302   
|                                          |  |                              |        |      |   |       
|Total                                     |  | $                            | 21,108 |      | $ | 18,289
|                                          |  |                              |        |      |   |       

The following is a summary of revenue by product type:



|                                        |  |                               |        |                      |      |   |        |   |                      |  |     |  
|--------------------------------------- |  | ----------------------------- | ------ | -------------------- | ---- | - | ------ | - | -------------------- |  | --- | -
|                                        |  | Three Months Ended March 31,  |       
|                                        |  | 2007                          |        |                      | 2006 |  
|                                        |  | Amount                        |        | Percentof netrevenue |      |   | Amount |   | Percentof netrevenue | 
|                                        |  | (dollar amounts in thousands) |       
|Display and Lighting Solutions          |  | $                             | 11,901 |                      | 56   | % |        | $ | 10,466               |  | 57  | %
|Interface and Power Management          |  |                               | 3,762  |                      | 18   | % |        |   | 4,366                |  | 24  | %
|Voltage Regulation and DC/DC Conversion |  |                               | 5,055  |                      | 24   | % |        |   | 3,423                |  | 19  | %
|Battery Management                      |  |                               | 390    |                      | 2    | % |        |   | 34                   |  | 0   | %
|                                        |  |                               |        |                      |      |   |        |   |                      |  |     |  
|Total                                   |  | $                             | 21,108 |                      | 100  | % |        | $ | 18,289               |  | 100 | %
|                                        |  |                               |        |                      |      |   |        |   |                      |  |     |  

The following table summarizes net revenue and accounts receivable for customers who accounted for
10% or more of accounts receivable or net revenue:



|         |  |                     |   |      |                  |   |      |           |   |  |    |  
|-------- |  | ------------------- | - | ---- | ---------------- | - | ---- | --------- | - |  | -- | -
|         |  | Accounts Receivable |   |      | Net Revenue      |  
|         |  | March 31,2007       |   |      | December 31,2006 |   |      | March 31, |  
|Customer |  |                     |   | 2007 |                  |   | 2006 |          
|A        |  | 27                  | % |      | 24               | % |      | 24        | % |  | 35 | %
|B        |  | 18                  | % |      |                 |   |      | 14        | % |  |   |  
|C        |  | 12                  | % |      | 21               | % |      | 12        | % |  |   |  



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##### Table of Contents

8. INCOME TAXES

The Company recorded tax provision of $131,000 and $46,000 for the first quarters of 2007 and 2006, respectively. The Company accounts for income taxes under the provisions of SFAS No. 109, Accounting for
Income Taxes. Under this method, the Company determines deferred tax assets and liabilities based upon the differences between the financial statement and tax bases of our assets and liabilities using tax rates in effect for the year in which
the Company expects the differences to affect taxable income. The Company adopted SFAS 123(R) as of January 1, 2006, and, as a result, incurred significant stock-based compensation expense, most of which related to incentive stock options
for which no corresponding tax benefit is recognized unless a disqualifying disposition occurs. Disqualifying dispositions result in a reduction of income tax expense in the quarter when the disqualifying disposition occurs in an amount equal
to the tax benefit relating to previously expensed stock compensation. During the three months ended March 31, 2007 and March 31, 2006, tax expense was reduced by approximately $21,000 and $0.1 million respectively, as a result of
disqualifying dispositions. As of March 31, 2007, we had not recorded tax benefits related to tax deductions in excess of previously expensed stock compensation because the Company has a net operating loss carry forward. Due to the
termination of certain non statutory options, tax benefits recognized in prior periods from such stock compensation expense were reversed during the quarter ended March 31, 2006. During the three months ended March 31, 2007, tax expense
was increased by approximately $205,000 as a result of reversal of tax benefits recognized under SFAS 123(R).

The percentage tax rate
reflected in our results of operations is based on an estimate of net income for the fiscal year 2007 that we make at the end of each quarter. At March 31, 2007, without tax benefits realized through disqualifying dispositions and reversal of
tax benefit recognized under SFAS 123(R), our full year estimate of the 2007 effective tax rate was approximately (2)%. However, with tax benefits realized through disqualifying dispositions and reversal of tax benefit recognized under SFAS
123(R), the effective tax rate was approximately 5%.

9. LEGAL PROCEEDINGS

In May 2003, the Company received a letter from Linear Technology Corporation (Linear Technology) alleging that certain of its charge pump
products infringed United States Patent No. 6,411,531 owned by Linear Technology. In August 2004, the Company received a letter from Linear Technology alleging that certain of its switching regulator products infringed United States Patent Nos.
5,481,178, 6,304,066 and 6,580,258. In response to these letters, the Company contacted Linear Technology to convey in good faith the belief that it does not infringe the patents in question. Subsequently, the Company became aware of a marketing
campaign conducted by Linear Technology in which they sought to disrupt the Companys business relationships and sales by suggesting to the Companys customers that its products infringe the same U.S. patents mentioned in their two letters
to the Company. As a result, in February 2006, the Company initiated a lawsuit against Linear Technology for unfair business practices, interference with existing and prospective customers and trade libel, as well as a declaration of patent
invalidity and non-infringement. This case is currently stayed pending the outcome of the United States International Trade Commission (USITC) investigation described in the following paragraph.

In March 2006, the USITC responded to a petition filed by Linear Technology by initiating an examination to determine if certain of the Companys
products infringe certain patents owned by Linear Technology under Section 337 of the Tariff Act. The accused products include charge pumps and switching regulators and are similar to the products involved in the Companys lawsuit with
Linear Technology. The Company believes that none of its products infringe the Linear Technology patents in question. However, whether or not the Company prevails in this investigation, the Company expects to incur significant legal expenses.



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##### Table of Contents

Because the subject matter of this action is similar to the subject matter involved in the Companys lawsuit with Linear Technology, the Company
believes the expected costs associated with these two matters to be substantially less than the costs that would typically result from two unrelated matters. If the Company is unsuccessful in this case, its business and ability to compete in foreign
markets could be harmed, and it could be enjoined from selling the accused products in the United States, either directly or indirectly, which could have a material adverse impact on the Companys revenues, financial condition, results of
operations and cash flows.

In July 2006, the Company and Siliconix settled the on-going patent litigation initiated by Siliconix against
the Company concerning Siliconixs United States Patents. Under the terms of the settlement, the Company and Siliconix agreed to dismiss all claims and counterclaims in the litigation. Both the Company and Siliconix will continue marketing
their respective trench DMOS product lines. The settlement had no material impact on the Companys financial statements.



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##### Table of Contents

|ITEM 2. | 
|------- | 

MANAGEMENTS DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our condensed consolidated financial statements and related notes appearing elsewhere in
this Quarterly Report on Form 10-Q and our recently filed Form 10-K. In addition to historical information, this discussion and analysis contains forward-looking statements that involve risks, uncertainties and assumptions. Our actual results may
differ materially from those anticipated in these forward-looking statements as a result of certain factors, including but not limited to, those set forth under Risk Factors and elsewhere in this Quarterly Report on Form 10-Q.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements. When used in this Quarterly Report on Form 10-Q the words anticipate, objective, may, might,
should, could, can, intend, expect, believe, estimate, predict, potential, plan, is designed to or the negative of
these and similar expressions identify forward-looking statements. Forward-looking statements include, but are not limited to, statements about:



| |  |  | our expectations regarding our expenses, sales and operations;
| | - |  | --------------------------------------------------------------



| |  |  | our anticipated cash needs and our estimates regarding our capital requirements and our need for additional financing;
| | - |  | ----------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to anticipate the future needs of our customers;
| | - |  | ------------------------------------------------------------



| |  |  | our plans for future products and enhancements of existing products;
| | - |  | --------------------------------------------------------------------



| |  |  | our growth strategy elements;
| | - |  | -----------------------------



| |  |  | our increased headcount as we expand our operations;
| | - |  | ----------------------------------------------------



| |  |  | our intellectual property;
| | - |  | --------------------------



| |  |  | our anticipated trends and challenges in the markets in which we operate; and
| | - |  | -----------------------------------------------------------------------------



| |  |  | our ability to attract customers.
| | - |  | ---------------------------------

These statements reflect our current views with respect to future events and are based on assumptions and subject to risk and uncertainties. Given these uncertainties, you should not place undue reliance on these forward-looking statements.
While we believe our plans, intentions and expectations reflected in those forward-looking statements are reasonable, we cannot assure you that these plans, intentions or expectations will be achieved. Our actual results, performance or achievements
could differ materially from those contemplated, expressed or implied by the forward-looking statements contained in this Quarterly Report on Form 10-Q, including those under the heading Risk Factors.

All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements
set forth in this Quarterly Report on Form 10-Q. Other than as required by applicable laws, we are under no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.



14



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##### Table of Contents

Overview

We are a supplier of power management semiconductors for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras and personal media players. We focus our design and
marketing efforts on the application-specific power management needs of consumer, communications and computing applications in these rapidly-evolving devices. Through our Total Power Management approach, we offer a broad range of products that
support multiple applications, features and services across a diverse set of mobile consumer electronic devices. We sell directly to original equipment manufacturers, or OEMs, including LG Electronics, Inc., Samsung Electronics Co., Ltd.,
Sagem SA, Pantech & Curitel Communications, Inc., Motorola, Inc. and Sony Ericsson. We sell through distributors and original design manufacturers, or ODMs, to other system designers, including Hewlett-Packard Company, Dell Inc.,
Lenovo Group Ltd., Quanta Computers Inc., HTC Corporation and Compal Electronics, Inc.

Our net revenue in the first quarter of 2007
increased 15 percent compared to the first quarter of 2006 primarily as a result of increased revenue from sale of our Display, Lighting Solutions, Voltage Regulation and DC/DC Conversion product families. Gross profit in the first quarter of 2007
declined eight percent compared to the first quarter of 2006 primarily due to unfavorable change in the product mix sold during the first quarter of 2007.

Cash, cash equivalent and short term investments as of March 31, 2007 remained flat at $108 million compared to December 31, 2006. We continue to be debt free as of March 31, 2007.

Critical Accounting Estimates

Our discussion and
analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation
of our financial statements requires us to make estimates and judgments that affect the reported amounts in our condensed consolidated financial statements. We evaluate our estimates on an on-going basis, including those related to our revenues,
inventories, asset impairments, and income taxes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances the results of which form the basis for making judgments about
the carrying values of assets and liabilities. Although actual results have historically been reasonably consistent with managements expectations, the actual results may differ from these estimates or our estimates may be affected by different
assumptions or conditions.

Management believes that there have been no significant changes during the three months ended March 31,
2007 to the items that we disclosed as our critical accounting policies and estimates in the Managements Discussion and Analysis of Financial Condition and Results of Operations section of our Annual Report on Form 10-K for the year ended
December 31, 2006.



15



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##### Table of Contents

Results of Operations

The following table sets forth our unaudited historical operating results, in dollar amounts and as a percentage of revenues for the periods indicated:



|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|------------------------------------------------ |  | --------------------------------- | - |  | ----- | - |  | ------ | - |  | ----- | -
|                                                 |  | Three Months Ended March 31,      |  
|                                                 |  | 2007                              |   |  | 2006  |  
|                                                 |  | (in thousands except percentages) |  
|Net revenue                                      |  | 21,108                            |   |  | 100.0 | % |  | 18,289 |   |  | 100.0 | %
|Cost of revenue                                  |  | 9,932                             |   |  | 47.1  |   |  | 7,134  |   |  | 39.0  |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|                                                 |  |                                   |   | 
|Gross profit                                     |  | 11,176                            |   |  | 52.9  |   |  | 11,155 |   |  | 61.0  |  
|Operating expenses:                              |  |                                   |   |  |       |   |  |        |   |  |       |  
|Research and development                         |  | 7,103                             |   |  | 33.7  |   |  | 6,055  |   |  | 33.1  |  
|Sales, general and administrative                |  | 6,202                             |   |  | 29.4  |   |  | 5,173  |   |  | 28.3  |  
|Patent litigation                                |  | 1,589                             |   |  | 7.5   |   |  | 383    |   |  | 2.1   |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|Total operating expenses                         |  | 14,894                            |   |  | 70.6  |   |  | 11,611 |   |  | 63.5  |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|                                                 |  |                                   |   | 
|Income (loss) from operations                    |  | (3,718                            | ) |  | (17.6 | ) |  | (456   | ) |  | (2.5  | )
|Interest and other income (expense), net:        |  |                                   |   |  |       |   |  |        |   |  |       |  
|Interest income                                  |  | 1,369                             |   |  | 6.5   |   |  | 1,234  |   |  | 6.7   |  
|Interest expense and other income (expense), net |  | (271                              | ) |  | (1.3  | ) |  | 14     |   |  | 0.1   |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|                                                 |  |                                   |   | 
|Total interest and other income, net             |  | 1,098                             |   |  | 5.2   |   |  | 1,248  |   |  | 6.8   |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|                                                 |  |                                   |   | 
|Income (loss) before income taxes                |  | (2,620                            | ) |  | (12.4 | ) |  | 792    |   |  | 4.3   |  
|Provision for income taxes                       |  | 131                               |   |  | 0.6   |   |  | 46     |   |  | 0.3   |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  
|                                                 |  |                                   |   | 
|Net income (loss)                                |  | (2,751                            | ) |  | (13   | ) |  | 746    |   |  | 4.0   |  
|                                                 |  |                                   |   |  |       |   |  |        |   |  |       |  

Comparison of Three Months ended March 31, 2007 and March 31, 2006

Revenues

The following table illustrates our
net revenue by principal product families:



|                                        |  |                               |        |                        |      |   |        |   |                        |  |     |  
|--------------------------------------- |  | ----------------------------- | ------ | ---------------------- | ---- | - | ------ | - | ---------------------- |  | --- | -
|                                        |  | Three Months Ended March 31,  |       
|                                        |  | 2007                          |        |                        | 2006 |  
|                                        |  | Amount                        |        | Percent of net revenue |      |   | Amount |   | Percent of net revenue | 
|                                        |  | (dollar amounts in thousands) |       
|Display and Lighting Solutions          |  | $                             | 11,901 |                        | 56   | % |        | $ | 10,466                 |  | 57  | %
|Interface and Power Management          |  |                               | 3,762  |                        | 18   | % |        |   | 4,366                  |  | 24  | %
|Voltage Regulation and DC/DC Conversion |  |                               | 5,055  |                        | 24   | % |        |   | 3,423                  |  | 19  | %
|Battery Management                      |  |                               | 390    |                        | 2    | % |        |   | 34                     |  | 0   | %
|                                        |  |                               |        |                        |      |   |        |   |                        |  |     |  
|Total                                   |  | $                             | 21,108 |                        | 100  | % |        | $ | 18,289                 |  | 100 | %
|                                        |  |                               |        |                        |      |   |        |   |                        |  |     |  



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##### Table of Contents

Our net revenue for the three months ended March 31, 2007 as compared to 2006 increased $2.8
million, or 15 percent. This growth was primarily attributable to our Display, Lighting Solutions, Voltage Regulation and DC/DC Conversion product families, as a result of increased demand.

Geographically, sales to China increased due to higher demand from several of our distributors while sales to Europe and Korea decreased slightly.

Gross Profit



|                               |  |                               |        |   |      |   |        |                     |  |   |       |    |  |      |  
|------------------------------ |  | ----------------------------- | ------ | - | ---- | - | ------ | ------------------- |  | - | ----- | -- |  | ---- | -
|                               |  | Three Months Ended March 31,  |        |   |      |   |        |                     | 
|                               |  | 2007                          |        |   | 2006 |   |        | Increase (Decrease) | 
|                               |  | (dollar amounts in thousands) |       
|Net revenue                    |  | $                             | 21,108 |   |      | $ | 18,289 |                     |  | $ | 2,819 |    |  | 15.4 | %
|Cost of revenue                |  |                               | 9,932  |   |      |   | 7,134  |                     |  |   | 2,798 |    |  | 39.2 | %
|                               |  |                               |        |   |      |   |        |                     |  |   |       |    |  |      |  
|Gross profit                   |  | $                             | 11,176 |   |      | $ | 11,155 |                     |  |   |       |    |  |      |  
|                               |  |                               |        |   |      |   |        |                     |  |   |       |    |  |      |  
|Gross profit margin percentage |  |                               | 52.9   | % |      |   | 61.0   | %                   |  |   | (8.0  | %) |  |      |  

Our gross margin was 52.9 percent for the three months ended March 31, 2007, compared to 61.0
percent for the three months ended March 31, 2006. This decrease was primarily due to an unfavorable change in product mix in the first quarter of 2007 as we sold more lower-margin products.

During the first quarter of 2007, our gross inventory write-down was approximately $1.1 million, offset by the sale of $1.0 million of previously written
down inventory. During the first quarter of 2006, our gross inventory write-down was approximately $0.6 million, offset by the sale of $0.6 million of previously written down inventory. The net effect of inventory write-down on our gross margin has
been flat.

Research and Development



|                          |  |                               |       |   |      |   |       |                     |  |   |       |   |  |      |  
|------------------------- |  | ----------------------------- | ----- | - | ---- | - | ----- | ------------------- |  | - | ----- | - |  | ---- | -
|                          |  | Three Months Ended March 31,  |       |   |      |   |       |                     | 
|                          |  | 2007                          |       |   | 2006 |   |       | Increase (Decrease) | 
|                          |  | (dollar amounts in thousands) |      
|Research and development  |  | $                             | 7,103 |   |      | $ | 6,055 |                     |  | $ | 1,048 |   |  | 17.3 | %
|                          |  |                               |       |   |      |   |       |                     |  |   |       |   |  |      |  
|Percentage of net revenue |  |                               | 33.7  | % |      |   | 33.1  | %                   |  |   | .6    | % |  |      |  

Research and development expenses for the three months ended March 31, 2007 increased as
compared to 2006 primarily due to a $0.6 million increase in payroll and benefit related expenses as a result of higher headcount, a $0.3 million increase in engineering expenses as we continue to develop new products and a $0.1 million increase in
travel expense and outside services.



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Sales, General and Administrative



|                                  |  |                               |       |   |      |   |       |                     |  |   |       |   |  |      |  
|--------------------------------- |  | ----------------------------- | ----- | - | ---- | - | ----- | ------------------- |  | - | ----- | - |  | ---- | -
|                                  |  | Three Months Ended March 31,  |       |   |      |   |       |                     | 
|                                  |  | 2007                          |       |   | 2006 |   |       | Increase (Decrease) | 
|                                  |  | (dollar amounts in thousands) |      
|Sales, general and administrative |  | $                             | 6,202 |   |      | $ | 5,173 |                     |  | $ | 1,029 |   |  | 19.9 | %
|                                  |  |                               |       |   |      |   |       |                     |  |   |       |   |  |      |  
|Percentage of net revenue         |  |                               | 29.4  | % |      |   | 28.3  | %                   |  |   | 1.1   | % |  |      |  

Sales, general and administrative expenses for the three months ended March 31, 2007
increased as compared to 2006 primarily due to a $0.7 million increase in payroll and benefit related expenses as a result of higher headcount and a $0.3 million increase in stock compensation expenses. Sales, general and administrative expense as a
percentage of net revenue increased one percent.

Patent Litigation



|                          |  |                               |       |   |      |   |     |                     |  |   |       |   |  |       |  
|------------------------- |  | ----------------------------- | ----- | - | ---- | - | --- | ------------------- |  | - | ----- | - |  | ----- | -
|                          |  | Three Months Ended March 31,  |       |   |      |  
|                          |  | 2007                          |       |   | 2006 |   |     | Increase (Decrease) | 
|                          |  | (dollar amounts in thousands) |      
|Patent litigation         |  | $                             | 1,589 |   |      | $ | 383 |                     |  | $ | 1,206 |   |  | 314.9 | %
|                          |  |                               |       |   |      |   |     |                     |  |   |       |   |  |       |  
|Percentage of net revenue |  |                               | 7.5   | % |      |   | 2.1 | %                   |  |   | 5.4   | % |  |       |  

Patent litigation expenses for the three months ended March 31, 2007 increased as compared to
2006 as we continue to defend our positions in litigation. We believe that we will incur additional litigation expenses in 2007 although at a lower rate than in 2006. For a description of litigation expenses please see Note 9, Legal Proceedings, to
the Consolidated Financial Statements for further details.

Interest and Investment Income

Interest and investment income was approximately $1.4 million in the first quarter of 2007 as compared to $1.2 million in the first quarter of 2006 due to
slightly higher average interest rates.

Interest and Other Expense

Other expense in the first quarter of 2007 was approximately $0.3 million, primarily consisting of a $0.3 million write-off of cumulative translation
adjustment loss as a result of the liquidation of our Sweden branch office.

Provision for Income Taxes

Our income tax provision was approximately $131,000 and $46,000 for the first quarters ended March 31, 2007 and 2006, respectively. The increase
is primarily due to adoption of SFAS 123(R). We account for income taxes under the provisions of SFAS No. 109, Accounting for Income Taxes. Under this method, we determine deferred tax assets and liabilities based upon the
differences between the financial statement and tax bases of our assets and liabilities using tax rates in effect for the year in which we expect the differences to affect taxable income. We adopted SFAS 123(R) as of January 1, 2006, and,
as a result, incurred significant stock-based compensation expense, most of which related to incentive stock options for which no corresponding tax benefit is recognized unless a disqualifying disposition occurs. Disqualifying dispositions
result in a reduction of income tax expense in the quarter when the disqualifying disposition occurs in an amount equal to the tax benefit relating to previously expensed stock compensation. During the three months ended March 31, 2007 and
March 31, 2006, tax expense was reduced by approximately $21,000 and $0.1 million respectively, as a result of disqualifying dispositions. As of March 31, 2007, we had not recorded tax



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benefits related to tax deductions in excess of previously expensed stock compensation because of our net operating loss carry forward. Due to the
termination of certain non statutory options, tax benefits recognized in prior periods from such stock compensation expense were reversed during the quarter ended March 31, 2006. During the three months ended March 31, 2007, tax expense
was increased by approximately $205,000 as a result of reversal of tax benefits recognized under SFAS 123(R).

The percentage tax rate
reflected in our results of operations is based on an estimate of net income for the fiscal year 2007 that we make at the end of each quarter. At March 31, 2007, without tax benefits realized through disqualifying dispositions and reversal of
tax benefit recognized under SFAS 123(R), our full year estimate of the 2007 effective tax rate was approximately (2)%. However, with tax benefits realized through disqualifying dispositions and reversal of tax benefit recognized under SFAS
123(R), the effective tax rate was approximately 5%.

Recently Issued Accounting Pronouncements

FIN 48

On
July 13, 2006, the FASB issued Interpretation No. 48, Accounting for Uncertainty in Income Taxes  An Interpretation of FASB Statement No. 109 (FIN 48). FIN 48 clarifies the accounting for uncertainty in
income taxes recognized in an entitys financial statements in accordance with FASB Statement No. 109, Accounting for Income Taxes and prescribes a recognition threshold and measurement attributes for financial statement
disclosure of tax positions taken or expected to be taken on a tax return. Under FIN 48, the impact of an uncertain income tax position on the income tax return must be recognized at the largest amount that is more likely than not to be sustained
upon audit by the relevant taxing authority. An uncertain income tax position will not be recognized if it has less than a 50% likelihood of being sustained. Additionally, FIN 48 provides guidance on derecognition, classification, interest and
penalties, accounting in interim periods, disclosure and transition. FIN 48 is effective for fiscal years beginning after December 15, 2006.

We adopted the provisions of FIN 48 on January 1, 2007. The total amount of unrecognized tax benefits as of the date of adoption was approximately $2,417,000. If such unrecognized tax benefits are recognized, the effective tax rate
would be affected. As a result of the implementation of FIN 48, we recognized approximately $550,000 of a net decrease in the liability for unrecognized tax benefits which was accounted for as follows:



|                                                  |  |   |          |  
|------------------------------------------------- |  | - | -------- | -
|Increase in Retained Earnings (cumulative effect) |  | $ | 848,000  |  
|Decrease in Retained Earnings (cumulative effect) |  | $ | (305,000 | )
|Reduction in Deferred Tax Assets                  |  | $ | 7,000    |  
|                                                  |  |   |          |  
|Decrease in Liability                             |  | $ | 550,000  |  
|                                                  |  |   |          |  

Included in the balance of unrecognized tax benefits at January 1, 2007, are approximately
$543,000 of tax benefits that, if recognized, would affect the effective tax rate. Also included in the balance of unrecognized tax benefits at January 1, 2007, are approximately $7,000 of tax benefits that, if recognized, would result in
adjustments to deferred tax assets.

We recognize interest and penalties accrued related to unrecognized tax benefits in income tax
expense. During the year ended December 31, 2006, we recognized approximately $16,000 in penalties and interest. During the years ended December 31, 2005 and 2004, no penalties and interest were recognized. There had been no payment of
interest and penalties accrued at December 31, 2006. Upon adoption of FIN 48 on January 1, 2007, we increased its accrual for interest and penalties to approximately $95,000.



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We are subject to taxation in the United States and various states and foreign jurisdictions. Our tax
years for 1997 through 2004 are subject to examination by the tax authorities. Currently, an estimate of the range of the reasonably possible change in unrecognized tax benefits in the next 12 months cannot be made. We are no longer subject to
foreign examinations by tax authorities for years before 2001.

SFAS 159

In February 2007, the FASB issued SFAS No. 159, The Fair Value Option for Financial Assets and Financial Liabilities (SFAS
159), which permits entities to choose to measure many financial instruments and certain other items at fair value. The objective is to improve financial reporting by providing entities with the opportunity to mitigate volatility in reported
earnings caused by measuring related assets and liabilities differently without having to apply complex hedge accounting provisions. SFAS 159 applies to all entities and is effective for fiscal years beginning after November 15, 2007. We do not
believe SFAS 159 will have any material impact on our financial statements.

Liquidity and Capital Resources



|                                                             |  |                               |        |   |      |   |       |                     |  |   |        |   |  |      |  
|------------------------------------------------------------ |  | ----------------------------- | ------ | - | ---- | - | ----- | ------------------- |  | - | ------ | - |  | ---- | -
|                                                             |  | Three Months Ended March 31,  |        |   |      |   |       |                     | 
|                                                             |  | 2007                          |        |   | 2006 |   |       | Increase (Decrease) | 
|                                                             |  | (dollar amounts in thousands) |       
|Net cash provided by operating activities                    |  | $                             | 795    |   |      | $ | 197   |                     |  | $ | 598    |   |  | 304  | %
|                                                             |  |                               |        |  
|Net cash used in investing activities                        |  |                               | (1,260 | ) |      |   | (571  | )                   |  |   | (689   | ) |  | 121  | %
|                                                             |  |                               |        |  
|Net cash provided by financing activities                    |  |                               | 227    |   |      |   | 1,710 |                     |  |   | (1,483 | ) |  | -87  | %
|Effect of exchange rate changes on cash and cash equivalents |  |                               | (44    | ) |      |   | (3    | )                   |  |   | (41    | ) |  | 1367 | %
|                                                             |  |                               |        |   |      |   |       |                     |  |   |        |   |  |      |  
|                                                             |  |                               |        |  
|Net increase (decrease) on cash and cash equivalents         |  | $                             | (282   | ) |      | $ | 1,333 |                     |  | $ | (1,615 | ) |  | -121 | %

Our cash, cash equivalents and short term investments were $107.8 million as of March 31,
2007 and $107.7 million as of December 31, 2006.

Net Cash Provided by Operating Activities

Net cash provided by operating activities was $0.8 million for the three months ended March 31, 2007. Net loss of $2.8 million was adjusted for
non-cash charges consisting primarily of $0.7 million of depreciation and amortization expense and $1.7 million of stock-based compensation expense. Accounts payable balance increased $3 million, offset by a decrease of $1.6 million in accrued
expenses. The net increase was primarily due to increased purchases of materials and production equipment to meet expected demand. Accounts receivable balance increased due to higher revenue during the period. Depreciation and amortization expense
increased mainly due to amortization of acquired intangible assets related to our acquisition of AP Semi during the fourth quarter of 2006.

Net cash provided by operating activities was $0.2 million for the three months ended March 31, 2006, which primarily consisted of net income of $0.7 million and an increase of $0.7 million in accounts payable, offset by decreases in
accrued liabilities of



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$0.9 million, increases in deferred tax assets of $0.8 million, increases in accounts receivable of $0.6 million, decreases in income taxes payable and
increases in inventory of approximately $0.2 million. In addition, we had an aggregate of $1.4 million of stock-based compensation expense, $0.4 million of depreciation and amortization expense and a net amount of $0.4 million attributable to tax
benefits from exercises of common stock options and warrants. Our accounts receivable balance increased due to the timing of sales during the fourth quarter of fiscal 2005, when we experienced greater sales during the beginning of the quarter
compared to the current quarter. Increases in our current assets are primarily attributable to increases in our current portion of our deferred tax assets.

Net Cash Used in Investing Activities

Net cash used in investing activities was $1.3 million in the
three months ended March 31, 2007, primarily as a result of $0.9 million used to purchase various equipment and to support our internal infrastructure growth and a net cash outflow of $0.4 million from purchases and maturities of our short-term
investments.

Net cash used in investing activities was $0.6 million in the three months ended March 31, 2006, primarily as a result
of cash used to purchase various engineering software and to support our internal infrastructure growth in the first quarter of 2006.

Net Cash Provided by Financing Activities

Net cash provided by financing activities was $0.2 million in the three months
ended March 31, 2007, primarily as a result of $0.3 million net proceeds from exercises of common stock options.

Net cash provided by
our financing activities was $1.7 million in the three months ended March 31, 2006, primarily as a result of net proceeds from exercises of common stock options and warrants and their related tax benefit.

Liquidity

We believe our existing
cash, cash equivalents and short-term investment balances, as well as cash expected to be generated from operating activities, will be sufficient to meet our anticipated cash needs for at least the next 12 months.

Our long-term future capital requirements will depend on many factors, including our level of revenue, the timing and extent of spending to support our
product development efforts, the expansion of sales and marketing activities, the timing of our introductions of new products, the costs to ensure access to adequate manufacturing capacity, our level of acquisition activity or other strategic
transactions, the continuing market acceptance of our products and the amount and intensity of our litigation activity. We could be required, or could elect, to seek additional funding through public or private equity or debt financing and
additional funds may not be available on terms acceptable to us or at all.

Off Balance Sheet Arrangements

We have not entered into any transactions with unconsolidated entities whereby we have financial guarantees, subordinated retained interests, derivative
instruments or other contingent arrangements that expose us to material continuing risks, contingent liabilities, or any other obligation under a variable interest in an unconsolidated entity that provides financing, liquidity, market risk or credit
risk support to us.



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Contractual Obligations

The following table describes our principal contractual cash obligations as of March 31, 2007:



|                                 |  |                |        |               |   |       |  |      |       |      |   |       |  |                 |     |  |   |     |  |   |      
|-------------------------------- |  | -------------- | ------ | ------------- | - | ----- |  | ---- | ----- | ---- | - | ----- |  | --------------- | --- |  | - | --- |  | - | -----
|                                 |  | Total          |        | Remaining2007 |   | 2008  |  | 2009 |       | 2010 |   | 2011  |  | 2012 and beyond
|                                 |  | (in thousands)
|Obligations under capital leases |  | $              | 296    |               | $ | 104   |  | $    | 151   |      | $ | 41    |  | $               |    |  | $ |    |  | $ |     
|                                 |  |                |        |               |   |       | 
|Operating leases                 |  |                | 4,979  |               |   | 932   |  |      | 483   |      |   | 426   |  |                 | 443 |  |   | 464 |  |   | 2,231
|Purchase commitments(1)          |  |                | 7,991  |               |   | 6,285 |  |      | 525   |      |   | 787   |  |                 | 394 |  |   |    |  |   |     
|                                 |  |                |        |               |   |       |  |      |       |      |   |       |  |                 |     |  |   |     |  |   |      
|Total contractual obligations    |  | $              | 13,266 |               | $ | 7,321 |  | $    | 1,159 |      | $ | 1,254 |  | $               | 837 |  | $ | 464 |  | $ | 2,231
|                                 |  |                |        |               |   |       |  |      |       |      |   |       |  |                 |     |  |   |     |  |   |      

---

|(1) | Purchase commitments consist primarily of our commitment to purchase wafers and technology licenses.
|--- | ----------------------------------------------------------------------------------------------------

In January 2007, we entered into a sublease for our future principal executive offices from September 2007 through
March 2016, occupying 42,174 square feet in Santa Clara, California. This facility will accommodate our principal engineering, technology, administrative and finance activities.



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|ITEM 3. | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
|------- | ----------------------------------------------------------

At March 31, 2007, we had cash and cash equivalents totaling $57.8 million, compared to $58.1 million at December 31, 2006. At March 31, 2007, we had $49.9 million in short-term investments as compared to $49.6 at
December 31, 2006. Cash equivalents have an original or remaining maturity when purchased of 90 days or less; short-term investments generally have an original or remaining maturity when purchased of greater than 90 days. The taxable equivalent
interest rates for the three months ended March 31, 2007, on those cash equivalents and short-term investments average approximately 5.4%. The primary objective of our investment activities is to preserve principal while maximizing income
without significantly increasing risk. Some of the securities in which we invest may be subject to market risk. This means that a change in prevailing interest rates may cause the principal amount of the investment to fluctuate. To minimize this
risk, we may maintain our portfolio of cash equivalents and short-term investments in a variety of securities, including commercial paper, money market funds, debt securities and certificates of deposit.

A hypothetical increase in market interest rates of 100 basis points from the market rates in effect at March 31, 2007 would cause the fair value of
these investments to decrease by an immaterial amount, which would not have significantly impacted our financial position or results of operations. Declines in interest rates over time will result in lower interest income. Based upon our analysis
the fair values did not change materially as our investments are of short duration.



|ITEM 4. | CONTROLS AND PROCEDURES
|------- | -----------------------

(a) Evaluation of Disclosure Controls
and Procedures

Our management evaluated, with the participation of our Chief Executive Officer and our Chief Financial Officer, the
effectiveness of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q. As of March 31, 2007 our management, with the participation of our Chief Executive Officer and our Chief
Financial Officer, concluded that our disclosure controls and procedures were effective to ensure that information that we are required to disclose in reports that we file or submit under the Securities Exchange Act of 1934 were recorded, processed,
summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms.

(b) Changes in Internal Controls Over
Financial Reporting

There was no change in our internal controls over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f)
under the Exchange Act) during the first quarter of 2007 covered by this Quarterly Report of Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal controls over financial reporting.



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PART II. OTHER INFORMATION



|ITEM 1. | LEGAL PROCEEDINGS
|------- | -----------------

In May 2003, we received a letter from Linear
Technology Corporation alleging that certain of our charge pump products infringed United States Patent No. 6,411,531 owned by Linear Technology. In August 2004, we received a letter from Linear Technology alleging that certain of our switching
regulator products infringed United States Patent Nos. 5,481,178, 6,304,066 and 6,580,258. In response to these letters, we contacted Linear Technology to convey our good faith belief that we do not infringe the patents in question. Subsequently, we
became aware of a marketing campaign conducted by Linear Technology in which they sought to disrupt our business relationships and sales by suggesting to our customers that our products infringe the same U.S. patents mentioned in their two letters
to us. As a result, in February 2006, we initiated a lawsuit against Linear Technology for unfair business practices, interference with existing and prospective customers and trade libel, as well as a declaration of patent invalidity and
non-infringement. This case is currently stayed pending the outcome of the United States International Trade Commission (USITC) investigation described in the following paragraph.

In March 2006, the USITC responded to a petition filed by Linear Technology by initiating an investigation to determine if certain of the our products infringe certain
patents owned by Linear Technology pursuant to Section 337 of the Tariff Act. The patents involved in this action are a subset of the patents involved in the lawsuit that we filed against Linear Technology. The accused products include charge
pumps and switching regulators and are similar to the products involved in our lawsuit with Linear Technology. We believe that none of our products infringe the Linear Technology patents in question. However, whether or not we prevail in this
investigation, we expect to incur significant legal expenses. If we are unsuccessful in this case, our business and our ability to compete in foreign markets could be harmed, and we and our customers could be enjoined from importing the accused
products into the United States, which could have a material adverse impact on our revenues, financial condition, results of operations and cash flows.

In
July 2006, we settled our on-going patent litigation initiated by Siliconix against us concerning several United States Patents owned by Siliconix. Under the terms of the settlement, we and Siliconix agreed to dismiss all claims and counterclaims in
the litigation. Both we and Siliconix will continue marketing our respective trench DMOS product lines. The settlement had no material impact on our financial statements.



|ITEM 1A. | RISK FACTORS
|-------- | ------------

Risks Related To Our Business

Our customers may cancel their orders, change production quantities or delay production, and if we fail to forecast demand for our products
accurately, we may incur product shortages, delays in product shipments or excess or insufficient product inventory.

We generally
do not obtain firm, long-term purchase commitments from our customers. Because production lead times often exceed the amount of time required to fulfill orders, we often must build in advance of orders, relying on an imperfect demand forecast to
project volumes and product mix. Our demand forecast accuracy can be adversely affected by a number of factors, including inaccurate forecasting by our customers, changes in market conditions, new part introductions by our competitors that lead to
our loss of previous design wins, adverse changes in our product order mix and demand for our customers products or models. China, in particular, is an emerging market where forecasting by our distributors is not accurate, and there can be
rapid changes in the distribution system and market conditions. Even after an order is received, our customers may cancel these orders or request a decrease in production quantities. Any such cancellation or decrease subjects us to a number of
risks, most notably that our projected



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sales will not materialize on schedule or at all, leading to unanticipated revenue shortfalls and excess or obsolete inventory which we may be unable to sell
to other customers. Alternatively, if we are unable to project customer requirements accurately, we may not build enough products, which could lead to delays in product shipments and lost sales opportunities in the near term, as well as force our
customers to identify alternative sources, which could affect our ongoing relationships with these customers. We have in the past had customers dramatically increase their requested production quantities with little or no advance notice and after
they had submitted their original order. We have on occasion been unable to fulfill these revised orders within the time period requested. Either underestimating or overestimating demand would lead to excess, obsolete or insufficient inventory,
which could harm our operating results, cash flow and financial condition, as well as our relationships with our customers.

We
receive a substantial portion of our revenues from a small number of customers, and the loss of, or a significant reduction in, orders from those customers or our other largest customers would adversely affect our operations and financial condition.

We receive a substantial portion of our revenues from two of our customers, LG Electronics Inc. of South Korea and Samsung of South
Korea. We received an aggregate of approximately 24% and 14% of our revenue from LG and Samsung for the first quarter of 2007 and 35% and 10% in the first quarter of 2006, respectively. We anticipate that we will continue to be dependent on LG and
Samsung for a significant portion of our revenue in the immediate future; however, we do not have long-term contractual purchase commitments from LG and Samsung, and we cannot assure you that LG and Samsung will continue to be our customers.

We received an aggregate of approximately 80% of our revenues from our ten largest customers for the first quarter of 2007. Any action by
LG and Samsung or any of our other largest customers that affects our orders, product pricing or vendor status could significantly reduce our revenues and harm our financial results. In the future, our sales to LG and Samsung or our other large
customers will continue to be susceptible to this type of quarterly fluctuation as our customers manage their inventories, principally for seasonal variations. In particular, our customers increase in inventory of our products in advance of
this peak buying season for wireless handsets often leads to sequentially lower sales of our products in the first calendar quarter and, potentially, late in the fourth calendar quarter. Because our largest customers account for such a significant
part of our business, the loss of, or a decline in sales to, any of our major customers would negatively impact our business.

Our
operating results have fluctuated in the past and we expect our operating results to continue to fluctuate.

Our revenues are
difficult to predict and have varied significantly in the past from period to period. We expect our revenues and expense levels to continue to vary in the future, making it difficult to predict our future operating results. In particular, we
experience seasonality and variability in demand for our products as our customers manage their inventories. Our customers tend to increase inventory of our products in anticipation of the peak fourth quarter buying season for the mobile consumer
electronic devices in which our products are used, which often leads to sequentially lower sales of our products in the first calendar quarter and, potentially, late in the fourth calendar quarter.

Additional factors that could cause our results to fluctuate include:



| |  |  | the forecasting, scheduling, rescheduling or cancellation of orders by our customers, particularly in China and other emerging markets;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------



| |  |  | costs associated with litigation, especially related to intellectual property;
| | - |  | ------------------------------------------------------------------------------



| |  |  | liquidity and cash flow of our distributors and end-market customers;
| | - |  | ---------------------------------------------------------------------



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| |  |  | changes in manufacturing costs, including wafer, test and assembly costs, and manufacturing yields, product quality and reliability;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the timing and availability of adequate manufacturing capacity from our manufacturing suppliers;
| | - |  | ------------------------------------------------------------------------------------------------



| |  |  | our ability to successfully define, design and release new products in a timely manner that meet our customers needs;
| | - |  | ----------------------------------------------------------------------------------------------------------------------



| |  |  | the timing, performance and pricing of new product introductions by us and by our competitors;
| | - |  | ----------------------------------------------------------------------------------------------



| |  |  | general economic conditions in the countries where we operate or our products are used;
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | changes in exchange rates, interest rates, tax rates and tax withholding;
| | - |  | -------------------------------------------------------------------------



| |  |  | geopolitical stability, especially affecting China, Taiwan and Asia in general; and
| | - |  | -----------------------------------------------------------------------------------



| |  |  | changes in domestic and international tax laws.
| | - |  | -----------------------------------------------

Unfavorable changes in any of the above factors, most of which are beyond our control, could significantly harm our business and results of operations.

We may be unsuccessful in developing and selling new products or in penetrating new markets.

We operate in a dynamic environment characterized by rapidly changing technologies and industry standards and technological obsolescence. Our
competitiveness and future success depends on our ability to design, develop, manufacture, assemble, test, market and support new products and enhancements on a timely and cost-effective basis. A fundamental shift in technologies in any of our
product markets could harm our competitive position within these markets. Our failure to anticipate these shifts, to develop new technologies or to react to changes in existing technologies could materially delay our development of new products,
which could result in product obsolescence, decreased revenues and a loss of design wins to our competitors. The success of a new product depends on accurate forecasts of long-term market demand and future technological developments, as well as on a
variety of specific implementation factors, including:



| |  |  | effective marketing, sales and service;
| | - |  | ---------------------------------------



| |  |  | timely and efficient completion of process design and device structure improvements and implementation of manufacturing, assembly and test processes; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the quality, performance and reliability of the product.
| | - |  | --------------------------------------------------------

If we fail to introduce new products or penetrate new markets, our revenues will likely decrease over time and our financial condition could suffer.

Due to defects and failures that may occur, our products may not meet specifications, which may cause customers to return or stop buying our
products and may expose us to product liability claims.

Our customers generally establish demanding specifications for quality,
performance and reliability that our products must meet. Integrated circuits, or ICs, as complex as ours often encounter development delays and may contain undetected defects or failures when first introduced or after commencement of commercial
shipments, which might require product replacement or recall. For example, in 2003 one of our low-dropout linear regulator products that we had been shipping for two years developed unacceptably high failure rates, which caused us to direct our
engineering personnel from other priorities to redesign the product. If defects and



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failures occur in our products during the design phase or after, we could experience lost revenues, increased costs, including warranty expense and costs
associated with customer support, delays in or cancellations or rescheduling of orders or shipments, or product returns or discounts, any of which would harm our operating results. We cannot assure you that we will have sufficient resources,
including any available insurance, to satisfy any asserted claims.

The nature of the design process requires us to incur expenses
prior to earning revenues associated with those expenses, and we will have difficulty selling our products if system designers do not design our products into their electronic systems.

We devote significant time and resources in working with our customers system designers to understand their future needs and to provide products
that we believe will meet those needs. If a customers system designer initially chooses a competitors product for a particular electronic system, it becomes significantly more difficult for us to sell our products for use in that
electronic system because changing suppliers can involve significant cost, time, effort and risk for our customers.

We often incur
significant expenditures in the development of a new product without any assurance that our customers system designers will select our product for use in their electronic systems. We often are required to anticipate which product designs will
generate demand in advance of our customers expressly indicating a need for that particular design. In some cases, there is minimal or no demand for our products in our anticipated target applications. Even if our products are selected by our
customers system designers, a substantial period of time will elapse before we generate revenues related to the significant expenses we have incurred. The reasons for this delay generally include the following elements of our product sales and
development cycle timeline and related influences:



| |  |  | our customers usually require a comprehensive technical evaluation of our products before they incorporate them into their electronic systems;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | it can take up to 12 months from the time our products are selected to complete the design process;
| | - |  | ---------------------------------------------------------------------------------------------------



| |  |  | it can take an additional nine to 12 months or longer to complete commercial introduction of the electronic systems that use our products, if they are introduced at
all;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | original equipment manufacturers typically limit the initial release of their electronic systems to evaluate performance and consumer demand; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The development and commercial introduction of products incorporating new technology are frequently delayed.
| | - |  | ------------------------------------------------------------------------------------------------------------

We estimate that the overall sales and development cycle timeline of an average product is approximately 16 months.

Additionally, even if system designers use our products in their electronic systems, we cannot assure you that these systems will be commercially
successful. As a result, we are unable to accurately forecast the volume and timing of our orders and revenues associated with any new product introductions.

Any increase in the manufacturing cost of our products could reduce our gross margins and operating profit.

The semiconductor business exhibits ongoing competitive pricing pressure from customers and competitors. Accordingly, any increase in the cost of our products, whether by adverse purchase price variances or adverse
manufacturing cost variances, will reduce our gross margins and operating profit. For example, if we do not incorporate the partially fabricated wafers held for us by our suppliers into our products in a timely fashion, we may still become obligated
to purchase these materials, which may reduce our



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gross margins. We do not have many long-term supply agreements with our manufacturing suppliers and, consequently, we may not be able to obtain price
reductions or anticipate or prevent future price increases from our suppliers.

The average selling price of our products may
decline, or a change in the mix of product orders may occur, either of which could reduce our gross margins.

During a power
management products life, its selling price tends to decrease for a particular application. As a result, to maintain gross margins on our products, we must continue to identify new applications for our products, reduce manufacturing costs for
our existing products and introduce new products. If we are unable to identify new, high gross margin applications for our existing products, reduce our production costs or sell new, high gross margin products, our gross margins will suffer. A
sustained reduction in our gross margins could harm our future operating results, cash flow and financial condition, which could lead to a significant drop in the price of our common stock.

Because we receive a substantial portion of our revenues through distributors, their financial viability and ability to access the capital markets
could impact our ability to continue to do business with them and could result in lower revenues, which could adversely affect our operating results and our customer relationships.

We obtain a portion of our revenues through sales to distributors located in Asia who act as our fulfillment representatives. Sales to distributors
accounted for 39% and 33% of our revenues for the first quarters of 2007 and 2006, respectively. In the normal course of their operation as fulfillment representatives, these distributors typically perform functions such as order scheduling,
shipment coordination, inventory stocking, payment and collections and, when applicable, currency exchange between purchasers of our products and these distributors. Our distributors compensation for these functions is reflected in the price
of the products we sell to these distributors. Many of our current distributors also serve as our sales representatives procuring orders for us to fill directly. If these distributors are unable to pay us in a timely manner or if we anticipate that
they will not pay us, we may elect to withhold future shipments, which could adversely affect our operating results. If one of our distributors experiences severe financial difficulties, becomes insolvent or declares bankruptcy, we could lose
product inventory held by that distributor and we could be required to write off the value of any receivables owed to us by that distributor. We could also be required to record bad debt expense in excess of our reserves. In the future, we may not
be successful in recognizing these indications or in finding replacement distributors in a timely manner, or at all, which could harm our operating results, cash flow and financial condition.

Our distributor arrangements often require us to accept product returns and to provide price protection and if we fail to properly estimate our
product returns and price protection reserves, this may adversely impact our reported financial information.

A substantial portion
of our sales are made through third-party distribution arrangements, which include stock rotation rights that generally permit the return of up to 5% of the previous six months purchases. We generally accept these returns in the second and
fourth quarter of each annual period. Our arrangements with our distributors typically also include price protection provisions if we reduce our list prices. We record estimated returns at the time of shipment, and we record reserves for price
protection at the time we decide to reduce our list prices. In the future, we could receive returns or claims that are in excess of our estimates and reserves, which could harm our operating results.



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Our distributor arrangements often require us to accept returns of unsold products if contractual
arrangements with a distributor are terminated, which could harm our operating results or, if we fail to take steps, could harm our relationship with these distributors and lead to a loss of revenues

If our relationship with any of our distributors deteriorates or terminates, it could lead to a temporary or permanent loss of revenues until a
replacement sales channel can be established to service the affected end-user customers, as well as inventory write-offs or accounts receivable write-offs. We may not be successful in finding suitable alternative distributors and this could
adversely affect our ability to sell in certain locations or to certain end-user customers. We also may be obligated to repurchase unsold products from a distributor if we decide to terminate our relationship with that distributor.

Our current backlog may not be indicative of future sales.

Due to the nature of our business, in which order lead times may vary, and the fact that customers are generally allowed to reschedule or cancel orders on short notice, we believe that our backlog is not necessarily a
good indicator of our future sales. Our quarterly revenues also depend on orders booked and shipped in that quarter. Because our lead times for the manufacturing of our products generally take six to ten weeks, we often must build in advance of
orders. This exposes us to certain risks, most notably the possibility that expected sales will not occur, which may lead to excess inventory, and we may not be able to sell this inventory to other customers. In addition, we supply LG, our largest
customer, through its central hub and we do not record backlog with respect to the products we ship to the hub. Therefore, our backlog may not be a reliable indicator of future sales.

If consumer demand for mobile consumer electronic devices declines, our revenues will decrease.

Our products are used primarily in the mobile consumer electronic devices market. For the foreseeable future, we expect to see the significant majority of
our revenues continue to come from this market, especially in wireless handsets. If consumer demand for these products declines, our revenues will decrease. If we are unsuccessful in identifying alternative markets for our products in a timely
manner, our operating results will suffer dramatically.

Substantially all of our manufacturing suppliers, customers and operations
are located in Asia, which subjects us to additional risks, including regional economic influences, logistical complexity, political instability, natural disasters including earthquakes and currency fluctuations.

We conduct, and expect to continue to conduct, almost all of our business with companies that are located outside the United States. Based on ship-to
locations, we derived approximately 97% and 98% of our revenues from customers outside of the United States in the first quarters of 2007 and 2006, respectively. Approximately 95% and 94% of our revenues came from customers in Asia, particularly
South Korea, Taiwan, China and Japan, in the first quarters of 2007 and 2006, respectively. A vast majority of our contract manufacturing operations are located in South Korea, Taiwan, Malaysia and China. In addition, we have a design center in
Shanghai with 30 employees as of March 31, 2007. As a result of our international focus, we face several challenges, including:



| |  |  | increased complexity and costs of managing international operations;
| | - |  | --------------------------------------------------------------------



| |  |  | longer and more difficult collection of receivables;
| | - |  | ----------------------------------------------------



| |  |  | political and economic instability;
| | - |  | -----------------------------------



| |  |  | limited protection of our intellectual property;
| | - |  | ------------------------------------------------



| |  |  | unanticipated changes in local regulations, including tax regulations;
| | - |  | ----------------------------------------------------------------------



| |  |  | timing and availability of import and export licenses; and
| | - |  | ----------------------------------------------------------



| |  |  | foreign currency exchange fluctuations relating to our international operating activities.
| | - |  | ------------------------------------------------------------------------------------------



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Our corporate headquarters in Sunnyvale, California, our operations office in Chupei, Taiwan, and the
production facilities of one of our wafer fabrication suppliers and several of our assembly and test suppliers in Hsinchu and across Taiwan are located near seismically active regions and are subject to periodic earthquakes. We do not maintain
earthquake insurance and our business could be damaged in the event of a major earthquake or other natural disaster.

In addition to risks
in our operations from natural disasters, our customers are also subject to these risks. Any disaster impacting our customers could result in loss of orders, delay of business and temporary regional economic recessions.

We are also more susceptible to the regional economic impact of health crises. Because we anticipate that we will continue to rely heavily on foreign
companies or U.S. companies operating in Asia for our future growth, the above risks and issues that we do not currently anticipate could adversely affect our ability to conduct business and our results of operations.

We outsource our wafer fabrication, testing, packaging, warehousing and shipping operations to third parties, and rely on these parties to produce
and deliver our products according to requested demands in specification, quantity, cost and time.

We rely on third parties for
substantially all of our manufacturing operations, including wafer fabrication, wafer probe, wafer thinning, assembly, final test, warehousing and shipping. We depend on these parties to supply us with material of a requested quantity in a timely
manner that meets our standards for yield, cost and manufacturing quality. Any problems with our manufacturing supply chain could adversely impact our ability to ship our products to our customers on time and in the quantity required, which in turn
could cause an unanticipated decline in our sales and possibly damage our customer relationships.

Our products are manufactured at a
limited number of locations. If we experience manufacturing problems at a particular location, we would be required to transfer manufacturing to a backup supplier. Converting or transferring manufacturing from a primary supplier to a backup
fabrication facility could be expensive and could take as long as six to 12 months. During such a transition, we would be required to meet customer demand from our then-existing inventory, as well as any partially finished goods that can be modified
to the required product specifications. We do not seek to maintain sufficient inventory to address a lengthy transition period because we believe it is uneconomical to keep more than minimal inventory on hand. As a result, we may not be able to meet
customer needs during such a transition, which could delay shipments, cause a production delay or stoppage for our customers, result in a decline in our sales and damage our customer relationships.

In addition, a significant portion of our sales is to customers that practice just-in-time order management from their suppliers, which gives us a very
limited amount of time in which to process and complete these orders. As a result, delays in our production or shipping by the parties to whom we outsource these functions could reduce our sales, damage our customer relationships and damage our
reputation in the marketplace, any of which could harm our business, results of operations and financial condition.

The loss of any
of our key personnel could seriously harm our business, and our failure to attract or retain specialized technical and management talent could impair our ability to grow our business.

The loss of services of one or more of our key personnel could seriously harm our business. In particular, our ability to define and design new products,
gain new customers and grow our business depends on the continued contributions of Richard K. Williams, our President, Chief Executive Officer and Chief Technical Officer, as well as our senior level sales, operations, technology and engineering
personnel. Our future growth will also depend significantly on our ability to recruit and retain qualified and talented managers and engineers, along with key manufacturing, quality, sales and marketing staff members. There remains intense



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competition for these individuals in our industry, especially those with power and analog semiconductor design and applications expertise. We cannot assure
you we will be successful in finding, hiring and retaining these individuals. If we are unable to recruit and retain such talent, our product and technology development, manufacturing, marketing and sales efforts could be impaired.

We compete against companies with substantially greater financial and other resources, and our market share or gross margins may be reduced if we
are unable to respond to competitive challenges effectively.

The analog, mixed-signal, or analog with digital, and power management
semiconductor industry in which we operate is highly competitive and dynamic, and we expect it to remain so. Our ability to compete effectively depends on defining, designing and regularly introducing new products that meet or anticipate the power
management needs of our customers next-generation products and applications. We compete with numerous domestic and international semiconductor companies, many of which have greater financial and other resources with which to pursue marketing,
technology development, product design, manufacturing, quality, sales and distribution of their products.

We consider our primary
competitors to be Maxim Integrated Products, Inc., Linear Technology Corporation, Texas Instruments Incorporated, Semtech Corporation and National Semiconductor Corporation. We expect continued competition from existing suppliers as well as from new
entrants into the power management semiconductor market. Our ability to compete depends on a number of factors, including:



| |  |  | our success in identifying new and emerging markets, applications and technologies, and developing power management solutions for these markets;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our products performance and cost effectiveness relative to that of our competitors products;
| | - |  | -----------------------------------------------------------------------------------------------



| |  |  | our ability to deliver products in large volume on a timely basis at a competitive price;
| | - |  | -----------------------------------------------------------------------------------------



| |  |  | our success in utilizing new and proprietary technologies to offer products and features previously not available in the marketplace;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to recruit application engineers and designers; and
| | - |  | ---------------------------------------------------------------



| |  |  | our ability to protect our intellectual property.
| | - |  | -------------------------------------------------

We cannot assure you that our products will compete favorably or that we will be successful in the face of increasing competition from new products and enhancements introduced by our existing competitors or new
companies entering this market.

Assertions by third parties of infringement by us of their intellectual property rights could result
in significant costs, reduce sales of our products and cause our operating results to suffer.

The semiconductor industry is
characterized by vigorous protection and pursuit of intellectual property rights and positions, which has resulted in protracted and expensive litigation for many companies. We have in the past received, and expect that in the future we may receive,
communications from various industry participants alleging our infringement of their patents, trade secrets or other intellectual property rights. Any lawsuits resulting from such allegations could subject us to significant liability for damages and
invalidate our proprietary rights. Any potential intellectual property litigation also could force us to do one or more of the following:



| |  |  | stop selling products or using technology that contain the allegedly infringing intellectual property;
| | - |  | ------------------------------------------------------------------------------------------------------



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| |  |  | incur significant legal expenses;
| | - |  | ---------------------------------



| |  |  | pay damages to the party claiming infringement;
| | - |  | -----------------------------------------------



| |  |  | redesign those products that contain the allegedly infringing intellectual property; and
| | - |  | ----------------------------------------------------------------------------------------



| |  |  | attempt to obtain a license to the relevant intellectual property from third parties, which may not be available on reasonable terms or at all.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------

We initiated a lawsuit against Linear Technology Corporation in February 2006 for unfair business practices,
interference with existing and prospective customers and trade libel, as well as a declaration of patent invalidity and non-infringement. In this case, we are seeking to prevent Linear Technology from continuing a marketing campaign designed to
disrupt our business relationships and sales by suggesting to our customers that our products infringe several U.S. patents owned by Linear Technology. As we informed Linear Technology in 2003 and 2004, and as discussed in our prior public filings,
we believe that none of our products infringe the patents in question. However, whether or not we prevail in this lawsuit, we expect to incur significant legal expenses related to this case. If we are unsuccessful in this case, our business and our
ability to compete in foreign markets could be harmed, and we could be enjoined from selling the accused products in the United States, either directly or indirectly, which could have a material adverse impact on our revenues, financial condition,
results of operations and cash flows.

In February 2006, in a related action, Linear Technology petitioned the United States International
Trade Commission (USITC) requesting that the USITC initiate an investigation to determine if certain of our products infringe certain patents owned by Linear Technology under Section 337 of the Tariff Act. The patents involved in
this action are a subset of the patents involved in the lawsuit that we filed against Linear Technology. The accused products include charge pumps and switching regulators and are similar to the products involved in our lawsuit with Linear
Technology. As with any litigated matter, we expect to incur expenses defending this action. If we are unsuccessful in this case, our business and our ability to compete in foreign markets could be harmed, and we could be enjoined from selling the
accused products in the United States, either directly or indirectly, which could have a material adverse impact on our revenues, financial condition, results of operations and cash flows.

Uncertainty over the outcome of our litigation with Linear Technology may cause our customers or potential customers to elect not to include our products
that are the subject of this litigation into the design of their systems. Once a customers system designer initially chooses a competitors product for a particular electronic system, it becomes significantly more difficult for us to sell
our products for use in that electronic system, because changing suppliers can involve significant cost, time, effort and risk for our customers. As a result, our litigation with Linear Technology or any similar future litigation may reduce both our
current and future revenues.

Our failure to protect our intellectual property rights adequately could impair our ability to compete
effectively or to defend ourselves from litigation, which could harm our business, financial condition and results of operations.

We rely primarily on patent, copyright, trademark and trade secret laws, as well as confidentiality and non-disclosure agreements to protect our proprietary technologies and know-how. While we have approximately 50 patents issued or allowed
in the United States or foreign countries and a larger number of pending applications, the rights granted to us may not be meaningful or provide us with any commercial advantage. For example, these patents could be challenged or circumvented by our
competitors or be declared invalid or unenforceable in judicial or administrative proceedings. The failure of our patents to adequately protect our technology might make it easier for our competitors to offer similar products or technologies. Our
foreign patent protection is



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generally not as comprehensive as our U.S. patent protection and may not protect our intellectual property in some countries where our products are sold or
may be sold in the future. Even if foreign patents are granted, effective enforcement in foreign countries may not be available. Many U.S.-based companies have encountered substantial intellectual property infringement in foreign countries,
including countries where we sell products.

Monitoring unauthorized use of our intellectual property is difficult and costly. It is
possible that unauthorized use of our intellectual property may occur without our knowledge. We cannot assure you that the steps we have taken will prevent unauthorized use of our intellectual property. Our failure to effectively protect our
intellectual property could reduce the value of our technology in licensing arrangements or in cross-licensing negotiations, and could harm our business, results of operations and financial condition. We may in the future need to initiate
infringement claims or litigation. Litigation, whether we are a plaintiff or a defendant, can be expensive, time-consuming and may divert the efforts of our technical staff and managerial personnel, which could harm our business, whether or not such
litigation results in a determination favorable to us.

We do not expect to sustain our recent growth rate, and we may not be able to
manage any future growth effectively.

We have experienced significant growth in a short period of time. Our revenues have increased
from approximately $1.0 million in 2001 to $81.2 million in 2006. We do not expect to achieve similar growth rates in future periods. You should not rely on our operating results for any prior quarterly or annual periods as an indication of our
future operating performance. If we are unable to maintain adequate revenue growth, our financial results could suffer and our stock price could decline.

We have also grown from 110 employees on January 1, 2004 to 262 employees on March 31, 2007, with many located in regional and international offices. Our international growth may subject us to income and
transaction taxes in the United States and in multiple foreign locations. Our future effective tax rates could be affected by changes in our U.S. and foreign tax estimates and liabilities, or changes in tax laws or the interpretation of such tax
laws. If additional taxes are assessed against us, our operating results or financial condition could be materially affected.

Our
expansion has placed a significant strain on our management, personnel, systems and resources. Any future expansion is likely to result in additional strain on our managerial infrastructure. To manage our growth successfully and handle the
responsibilities of being a public company, we believe we must effectively:



| |  |  | recruit, hire, train and manage additional qualified engineers for our research and development activities, especially in the positions of design engineering,
product and test engineering, and applications engineering;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | continue to implement and improve adequate administrative, financial and operational systems, procedures and controls; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------



| |  |  | enhance our information technology support for enterprise resource planning and design engineering by adapting and expanding our systems and tool capabilities, and
properly training new hires as to their use.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

If we are unable to manage our growth effectively, we may not be able to
take advantage of market opportunities or develop new products, our introduction of derivative products may be delayed and we may fail to satisfy customer requirements, maintain product quality, execute our business plan or respond to competitive
pressures.



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Any acquisitions we make could disrupt our business, result in integration difficulties or fail to
realize anticipated benefits, which could adversely affect our financial condition and operating results.

We may choose to acquire
companies, technologies, assets and personnel that are complementary to our business, including for the purpose of expanding our new product design capacity, introducing new design, market or application skills or enhancing and expanding our
existing product lines. On October 31, 2006, we acquired Analog Power Semiconductor Corporation (AP Semi) and related assets and personnel, primarily located in Shanghai, China. Acquisitions involve numerous risks, including the
following:



| |  |  | difficulties in integrating the operations, systems, technologies, products and personnel of the acquired companies;
| | - |  | --------------------------------------------------------------------------------------------------------------------



| |  |  | diversion of managements attention from normal daily operations of the business and the challenges of managing larger and more widespread operations resulting
from acquisitions;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | difficulties in entering markets in which we may have no or limited direct prior experience and where competitors may have stronger market positions;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the potential loss of key employees, customers, distributors, suppliers and other business partners of the companies we acquire following and continuing after
announcement of acquisition plans;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | improving and expanding our management information systems to accommodate expanded operations;
| | - |  | ----------------------------------------------------------------------------------------------



| |  |  | insufficient revenue to offset increased expenses associated with acquisitions; and
| | - |  | -----------------------------------------------------------------------------------



| |  |  | addressing unforeseen liabilities of acquired businesses.
| | - |  | ---------------------------------------------------------

Acquisitions may also cause us to:



| |  |  | issue capital stock that would dilute our current stockholders percentage ownership;
| | - |  | -------------------------------------------------------------------------------------



| |  |  | use a substantial portion of our cash resources or incur debt;
| | - |  | --------------------------------------------------------------



| |  |  | assume liabilities;
| | - |  | -------------------



| |  |  | record goodwill or incur amortization expenses related to certain intangible assets; and
| | - |  | ----------------------------------------------------------------------------------------



| |  |  | incur large and immediate write-offs and other related expenses.
| | - |  | ----------------------------------------------------------------

Any of these factors could prevent us from realizing the anticipated benefits of an acquisition, and our failure to realize these benefits could adversely affect our business. In addition, we may not be successful in
identifying future acquisition opportunities or in consummating any acquisitions that we may pursue on favorable terms, if at all. Any transactions that we complete may impair stockholder value or otherwise adversely affect our business and the
market price of our stock. Failure to manage and successfully integrate acquisitions could materially harm our financial condition and operating results.

The cyclical nature of the semiconductor industry, which has historically demonstrated significant and prolonged downturns, could impact our operating results, financial condition and cash flows.

The semiconductor industry has historically exhibited cyclical behavior which at various times has included significant downturns
in customer demand. These conditions have caused significant variations in product orders and production capacity utilization, as well as price erosion. Because a significant portion of our expenses is fixed in the near term or is incurred in
advance of anticipated sales, we may not be able to decrease our expenses rapidly enough to offset any unanticipated shortfall in revenues. If this situation were to occur, it could adversely affect our operating results, cash flow and financial
condition.



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Our business may be adversely impacted if our end customers cannot obtain sufficient supplies of
other components in their products to meet their production projections and target quantities.

Our power management products are
used by our customers in conjunction with a number of other components such as digital integrated circuits, baseband processors, microcontrollers and digital signal processors. If for any reason our customers incur a shortage of any component, their
ability to produce the forecasted quantity of their end product or model may be adversely affected and our product sales would decline until such shortage is remedied. Such a situation could harm our operating results, cash flow and financial
condition.

A failure of our information systems would adversely impact our ability to process orders for and manufacture products.

We operate a multinational business enterprise with manufacturing, administration and sales groups located in Asia, Europe and the
United States. These disparate groups are connected by a virtual private network-based enterprise resource planning system, where daily manufacturing operations and order entry functions rely on maintaining a reliable network among locations. Any
failure of our computer network or our enterprise resource planning system would impede our ability to schedule orders, monitor production work in process and ship and bill our finished goods to our customers.

A failure to maintain our international structure may adversely affect our tax rate, financial condition and operating results.

During 2005, we realigned certain areas of our operations in connection with the implementation of an international structure. This realignment
required us to transfer certain functions previously handled in our Sunnyvale, California headquarters to offices in foreign jurisdictions, primarily Macau. If we fail to maintain our realigned operations, our operating results may be adversely
affected. Additionally, our international structure results in an increased volume of transactions and accounting for those transactions may require us to increase our headcount either domestically or internationally. A failure to process those
transactions in an accurate and timely manner could be indicative of a material weakness in our internal controls over financial reporting. Our international structure requires that we understand complex tax laws and regulations in various domestic
and international jurisdictions. If we are unable to comply with domestic and international tax laws, our tax rate and our financial condition may be adversely impacted. Further, the domestic and international tax laws governing our structure are
subject to change, which could adversely affect our operations and financial results.

Changes in effective tax rates or adverse
outcomes resulting from examination of our income tax returns could adversely affect our results.

Our future effective tax rates
could be adversely affected by earnings being lower than anticipated in countries where we have lower statutory rates and higher than anticipated in countries where we have higher statutory rates, by changes in the valuation of our deferred tax
assets and liabilities, or by changes in tax laws, regulations, accounting principles or interpretations thereof. Further, as a result of certain ongoing employment and capital investment commitments made by us, our income in certain countries is
subject to reduced tax rates, and in some cases is wholly exempt from tax. Our failure to meet such commitments could adversely impact our effective tax rate. In addition, we are subject to the continuous examination of our income tax returns by the
Internal Revenue Service and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. There can be no assurance that the outcomes
from these continuous examinations will not have an adverse effect on our operating results and financial condition.



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The requirement that we expense employee stock options has significantly reduced our net income and
will continue to do so in future periods.

We adopted SFAS 123(R) effective January 1, 2006, which requires the measurement of
all share-based payments to employees, including grants of employee stock options, using a fair-value-based method and the recording of such expense in our consolidated statements of operations. As a result of adopting SFAS 123(R), we now have
additional stock compensation expense associated with grants after April 4, 2005, the date of our initial filing of our registration statement in connection with our initial public offering, based on the grant date fair value. The ultimate
amount of future stock compensation expense will depend upon the number of grants, the estimated grant date fair value, which depends upon significant assumptions including stock volatility and estimated term, the assumed forfeiture rate and the
requisite service period for future grants. This expense has had a significant impact on our results of operations since 2006. We have recorded approximately $1.7 million and $1.4 million of stock based compensation expense under SFAS 123(R) for the
quarters ended March 31, 2007 and 2006, respectively. We believe that this will continue to have a significant impact on our future operating results.

If we fail to maintain an effective system of internal controls, we may not be able to accurately report our financial results, our business could be harmed and our stock price could decline.

Effective internal controls are critical for us to provide reliable and accurate financial reports and prevent fraud. We have devoted significant
resources in order to comply with the internal control over financial reporting requirements under the Sarbanes-Oxley Act of 2002.

Our
compliance with the Sarbanes-Oxley Act of 2002 in the future will depend on the effectiveness of our financial reporting, integrity of the data, and effective controls across our operating subsidiaries. Part of our growth strategy has been, and may
continue to be, growth through the acquisition of complementary businesses. We expect the controls over the mergers and acquisitions and integration processes to be complex and thus increase difficulty and costs in managing and enforcing the
controls over the acquired businesses. Any failure to implement the required controls on the acquired businesses could cause it to fail to meet our financial reporting requirements. Inferior internal controls could also cause investors to lose
confidence in our reported financial information and could have a negative impact on the trading price of our stock. In addition, because of the uncertainty of the recent SEC and Public Company Accounting Oversight Board proposals regarding
Section 404, we cannot be certain that the controls we designed, implemented and maintained are effective to meet the new and future measures.



|ITEM 2. | UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
|------- | -----------------------------------------------------------

Not
applicable.



|ITEM 3. | DEFAULTS UPON SENIOR SECURITIES
|------- | -------------------------------

Not applicable.



|ITEM 4. | SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
|------- | ---------------------------------------------------

Not
applicable.



|ITEM 5. | OTHER INFORMATION
|------- | -----------------

Not applicable.



36



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##### Table of Contents

|ITEM 6. | EXHIBITS
|------- | --------



|      |  |                                                                                                                                                                                  
|----- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|31.1  |  | Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.
|      | 
|31.2  |  | Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.
|      | 
|32.1* |  | Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.   

---

|* | This exhibit shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section,
nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any
filings.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



37



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##### Table of Contents

ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED

SIGNATURE

Pursuant to the
requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.



|                   |  |                                             |  |                                                                           
|------------------ |  | ------------------------------------------- |  | --------------------------------------------------------------------------
|                   |  | ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED
|                   |  |                                            
|Dated: May 1, 2007 |  | By:                                         |  | /s/ Brian R. McDonald                                                     
|                   |  |                                             |  | Brian R. McDonald                                                         
|                   |  |                                             |  | Chief Financial Officer, Vice President of Worldwide
Finance and Secretary



38



---

##### Table of Contents

EXHIBIT INDEX



|      |  |                                                                                                                                                                                  
|----- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|31.1  |  | Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.
|      | 
|31.2  |  | Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.
|      | 
|32.1* |  | Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.   

---

|* | This exhibit shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section,
nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any
filings.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



39