**AMENDED AND RESTATED**
 **CERTIFICATE OF INCORPORATION**
 **OF**
 **VOLTERRA SEMICONDUCTOR CORPORATION**
 
 
 Jeffrey Staszak hereby certifies that:
 
 **ONE:** The original name of this corporation was Berkeley Integrated Technologies, Inc. and the date of filing of the original Certificate of Incorporation of this corporation with the Secretary of State of the State of Delaware was August 28, 1996.
 
 **TWO:** He **** is the duly elected and acting President of Volterra Semiconductor Corporation, a Delaware corporation.
 
 **THREE:** The Certificate of Incorporation of this corporation is hereby amended and restated to read as follows:
 
 **I.**
 
 The name of this corporation is Volterra Semiconductor Corporation.
 
 **II.**
 
 The address of the registered office of the corporation in the State of Delaware is 15 East North Street, City of Dover, County of Kent, and the name of the registered agent of the corporation in the State of Delaware at such address is Incorporating Services, Ltd.
 
 **III.**
 
 The purpose of this corporation is to engage in any lawful act or activity for which a corporation may be organized under the Delaware General Corporation Law ("DGCL").
 
 **IV.**
 
 **A.** This corporation is authorized to issue two classes of stock to be designated, respectively, "Common Stock" and "Preferred Stock." The total number of shares which the corporation is authorized to issue is two hundred five million (205,000,000) shares. Two hundred million (200,000,000) shares shall be Common Stock, each having a par value of one-tenth of one cent ($.001). Five million (5,000,000) shares shall be Preferred Stock, each having a par value of one-tenth of one cent ($.001).
 
 **B.** The Preferred Stock may be issued from time to time in one or more series. The Board of Directors is hereby expressly authorized to provide for the issue of all or any of the shares of the Preferred Stock in one or more series, and to fix the number of shares and to determine or alter for each such series, such voting powers, full or limited, or no voting powers, and such designation, preferences, and relative, participating, optional, or other rights and such qualifications, limitations, or restrictions thereof, as shall be stated and expressed in the resolution or resolutions adopted by the Board of Directors providing for the issuance of such shares and as m
ay be permitted by the DGCL. The Board of Directors is also expressly authorized to increase or decrease the number of shares of any series subsequent to the issuance of shares of that series, but not below the number of shares of such series then outstanding. In case the number of shares of any series shall be decreased in accordance with the foregoing sentence, the shares constituting such decrease shall resume the status that they had prior to the adoption of the resolution originally fixing the number of shares of such series.
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 **C.** Each outstanding share of Common Stock shall entitle the holder thereof to one vote on each matter properly submitted to the stockholders of the corporation for their vote; *provided, however* , that, except as otherwise required by law, holders of Common Stock shall not be entitled to vote on any amendment to this Certificate of Incorporation (including any certificate of designation filed with respect to any series of Preferred Stock) that relates solely to the terms of one
or more outstanding series of Preferred Stock if the holders of such affected series are entitled, either separately or together as a class with the holders of one or more other such series, to vote thereon by law or pursuant to this Certificate of Incorporation (including any certificate of designation filed with respect to any series of Preferred Stock).
 
 **V.**
 
 For the management of the business and for the conduct of the affairs of the corporation, and in further definition, limitation and regulation of the powers of the corporation, of its directors and of its stockholders or any class thereof, as the case may be, it is further provided that:
 
 **A.**
 
 **1.** **Management of the Business** . The management of the business and the conduct of the affairs of the corporation shall be vested in its Board of Directors. The number of directors that shall constitute the Board of Directors shall be fixed exclusively by resolutions adopted by a majority of the authorized number of directors constituting the Board of Directors.
 
 **2.** **Board of Directors** .
 
 **a.**  Subject to the rights of the holders of any series of Preferred Stock to elect additional directors under specified circumstances, immediately following the closing of the initial public offering pursuant to an effective registration statement under the Securities Act of 1933, as amended (the "1933 Act"), covering the offer and sale of Common Stock to the public (the "Initial Public Offering"), the directors shall be divided into three classes designated as Class I, Class II and Class III, respectively. At the first annual meeting of stockholders following the Initial Public Offering, the term of office of the Class I directors
 shall expire and Class I directors shall be elected for a full term of three years. At the second annual meeting of stockholders following the Initial Public Offering, the term of office of the Class II directors shall expire and Class II directors shall be elected for a full term of three years. At the third annual meeting of stockholders following the Initial Public Offering, the term of office of the Class III directors shall expire and Class III directors shall be elected for a full term of three years. At each succeeding annual meeting of stockholders, directors shall be elected for a full term of three years to succeed the directors of the class whose terms expire at such annual meeting.
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 **b.**  During such time or times that the corporation is subject to Section 2115(b) of the California General Corporation Law ("CGCL"), Section A.2.a. of this Article V shall not apply and all directors shall be elected at each annual meeting of stockholders to hold office until the next annual meeting.
 
 **c.**  No stockholder entitled to vote at an election for directors may cumulate votes to which such stockholder is entitled, unless, at the time of such election, the corporation is subject to Section 2115(b) of the CGCL. During such time or times that the corporation is subject to Section 2115(b) of the CGCL, every stockholder entitled to vote at an election for directors may cumulate such stockholders votes and give one candidate a number of votes equal to the number of directors to be elected multiplied by the number of votes to which such stockholders shares are otherwise entitled, or distribute the
stockholders votes on the same principle among as many candidates as such stockholder thinks fit. No stockholder, however, shall be entitled to so cumulate such stockholders votes unless (i) the names of such candidate or candidates have been placed in nomination prior to the voting and (ii) the stockholder has given notice at the meeting, prior to the voting, of such stockholders intention to cumulate such stockholders votes. If any stockholder has given proper notice to cumulate votes, all stockholders may cumulate their votes for any candidates who have been properly placed in nomination. Under cumulative voting, the candidates receiving the highest number of votes, up to the number of directors to be elected, are elected.
 
 Notwithstanding the foregoing provisions of this section, each director shall serve until his successor is duly elected and qualified or until his death, resignation or removal. No decrease in the number of directors constituting the Board of Directors shall shorten the term of any incumbent director.
 
 **3.** **Removal of Directors** .
 
 **a.**  During such time or times that the corporation is subject to Section 2115(b) of the CGCL, the Board of Directors or any individual director may be removed from office at any time without cause by the affirmative vote of the holders of at least a majority of the outstanding shares entitled to vote on such removal ; provided, however, that unless the entire Board is removed, no individual director may be removed when the votes cast against such directors removal, or not consenting in writing to such removal, would
be sufficient to elect that director if voted cumulatively at an election which the same total number of votes were cast (or, if such action is taken by written consent, all shares entitled to vote were voted) and the entire number of directors authorized at the time of such directors most recent election were then being elected.
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  **b.**  At any time or times that the corporation is not subject to Section 2115(b) of the CGCL and subject to any limitations imposed by law, Section A.3.a. above shall no longer apply and removal of directors shall be as provided in Section 141(k) of the DGCL.
 
 **4.**  **Vacancies** .
 
 **a.**  Except (i) as otherwise provided by applicable law, or (ii) as may be otherwise determined by the Board of Directors by resolution, and subject to the rights of the holders of any series of Preferred Stock, any vacancies on the Board of Directors resulting from death, resignation, disqualification, removal or other causes and any newly created directorships resulting from any increase in the number of directors, shall be filled only by the affirmative vote of a majority of the directors then in office, even though less than a quorum of the Board of Directors, and not by the stockholders. Except (i) as otherwise provided by
applicable law, or (ii) as may be otherwise determined by the Board of Directors by resolution, and subject to the rights of the holders of any series of Preferred Stock, any director elected in accordance with the preceding sentence shall hold office for the remainder of the full term of the director for which the vacancy was created or occurred and until such directors successor shall have been elected and qualified.
 
 **b.**  At any time or times that the corporation is subject to Section 2115(b) of the CGCL, if, after the filling of any vacancy, the directors then in office who have been elected by stockholders shall constitute less than a majority of the directors then in office, then
 
 **(i)**  Any holder or holders of an aggregate of five percent (5%) or more of the total number of shares at the time outstanding having the right to vote for those directors may call a special meeting of stockholders; or
 
 **(ii)**  The Superior Court of the proper county shall, upon application of such stockholder or stockholders, summarily order a special meeting of stockholders, to be held to elect the entire board, all in accordance with Section 305(c) of the CGCL. The term of office of any director shall terminate upon that election of a successor.
 
 **B.**
 
 **1.**  **Bylaw Amendments** . The Board of Directors is expressly empowered to adopt, amend or repeal the Bylaws of the corporation. **** The stockholders shall also have power to adopt, amend or repeal the Bylaws of the corporation; provided, however, that, in addition to any vote of the holders of any class or series of stock of the
corporation required by law or by this Certificate of Incorporation, such action by stockholders shall require the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-?%) of the voting power of all of the then-outstanding shares of the capital stock of the corporation entitled to vote generally in the election of directors, voting together as a single class.
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 **2.**  **Ballots** . The directors of the corporation need not be elected by written ballot unless the Bylaws so provide.
 
 **3.**  **Action by Stockholders** . No action shall be taken by the stockholders of the corporation except at an annual or special meeting of stockholders called in accordance with the Bylaws or, prior to the Initial Public Offering, by written consent or electronic transmission of stockholders in accordance with the Bylaws, and following the Initial Public Offering no action shall be taken by the stockholders by written consent or electronic transmission.
 
 **4.**  **Advance Notice** . Advance notice of stockholder nominations for the election of directors and of business to be brought by stockholders before any meeting of the stockholders of the corporation shall be given in the manner provided in the Bylaws of the corporation.
 
 **VI.**
 
 **A.**  The liability of the directors for monetary damages shall be eliminated to the fullest extent under applicable law. If the DGCL is amended to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of a director of the corporation shall be eliminated to the fullest extent permitted by the DGCL, as so amended.
 
 **B.**  This corporation is authorized to provide indemnification of agents (as defined in Section 317 of the CGCL) for breach of duty to the corporation and its shareholders through bylaw provisions or through agreements with the agents, or through shareholder resolutions, or otherwise, in excess of the indemnification otherwise permitted by Section 317 of the CGCL, subject, at any time or times the corporation is subject to Section 2115(b) to the limits on such excess indemnification set forth in Section 204 of the CGCL.
 
 **C.**  Any repeal or modification of this Article VI shall be prospective and shall not affect the rights under this Article VI in effect at the time of the alleged occurrence of any act or omission to act giving rise to liability or indemnification.
 
 **VII.**
 
 **A.**  The corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, except as provided in paragraph B of this Article VII, and all rights conferred upon the stockholders herein are granted subject to this reservation.
 
 **B.**  Notwithstanding any other provisions of this Certificate of Incorporation or any provision of law which might otherwise permit a lesser vote or no vote, but in addition to any affirmative vote of the holders of any particular class or series of the corporation required by law or by this Certificate of Incorporation or any certificate of designation filed with respect to a series of Preferred Stock, the affirmative vote of the holders of at least sixty-six and two-thirds percent (66-?%) of the voting power of all of the then-outstanding shares of capital stock of the corporation entitled to vote generally in the election of
directors, voting together as a single class, shall be required to alter, amend or repeal Articles V, VI, and VII.
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 **FOUR:** This Amended and Restated Certificate of Incorporation has been duly approved by the Board of Directors of the Company.
 
 **FIVE:** This Amended and Restated Certificate of Incorporation was approved by the holders of the requisite number of shares of said corporation in accordance with Section 228 of the DGCL. This Amended and Restated Certificate of Incorporation has been duly adopted in accordance with the provisions of Sections 242 and 245 of the DGCL by the stockholders of the Company.
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 **In Witness Whereof** , Volterra Semiconductor Corporation has caused this Amended and Restated Certificate of Incorporation to be signed by its President this 3rd day of August 2004.
  **Volterra Semiconductor Corporation**By:
/s/ Jeffrey StaszakJeffrey StaszakPresident ****
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