AIC1755B
30V, 200mA Low Dropout Voltage
Linear Regulator

 FEATURES DESCRIPTION

2.2μA Ground Current at no Load
 ±2% Output Accuracy
 200mA Output Current
 10nA Disable Current
 Wide Operating Input Voltage Range: 2V to30V Dropout Voltage: 0.15V at 100mA (VOUT=5V)
 Support Fixed Output Voltage 1.2V, 1.8V, 3.3V,5V, 9V, 12V
 Stable with Ceramic or Tantalum Capacitor
 Current Limit Protection
 Over-Temperature Protection
 SOT23-5 and DFN-4(1x1) Packages Available


The AIC1755B series are a group of low-dropout(LDO) voltage regulators offering the benefits ofwide input voltage range, low dropout voltage, lowpower consumption, and miniaturized packaging.
Quiescent current of only 2.2µA makes thesedevices ideal for powering the battery-powered,always-on systems that require very little idlestate power dissipation to a longer service life.
There is an option of shutdown mode by selecting
the parts with the EN pin and pulling it low. The
shutdown current in this mode goes down to only
10nA (typical).
The AIC1755B series of linear regulators arestable with the ceramic output capacitor over its
wide input range from 2V to 30V and the entire
range of output load current (0mA to 200mA).

 APPLICATIONS
Portable, Battery Powered Equipment
Low Power Microcontrollers
 Laptop, Palmtops and PDAs
 Wireless Communication Equipment
 Audio/Video Equipment
 Car Navigation Systems
 Industrial Controls
 Weighting Scales Meters
 Home Automation
 TYPICAL APPLICATION CIRCUIT
U112Vin

VIN
Cin
1μF

OFF ON

R1EN1kΩ

AIC1755B-33
VOUTENGND

3.3Vout
Cout1μF

AIC1755B Typical Application Circuit

Analog Integrations Corporation

Si-Soft Research Center

DS-1755BG-0220220915

st1A1, 1 Li-Hsin 1 Rd., Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500

FAX: 886-3-5772510

www.analog.com.tw1

AIC1755B

 ORDERING INFORMATION
AIC1755B-XXXXXX XXPIN CONFIGURATIONPACKING TYPE
TR: TAPE & REEL
BG: BAG

SOT23-5(U5)TOP VIEWPACKAGE TYPE
U5: SOT23-5
D4A: DFN-4(1x1)
G: GREEN PACKAGE
OUTPUT VOLTAGE
12: 1.2V
18: 1.8V
33: 3.3V
50: 5.0V
90: 9.0V
A1: 12.0V(Special Request: Any Voltage
between 1.2V and 12V underspecific business agreement)

1: VIN
2. GND
3. EN
4. NC
5. VOUT

51423DFN-4(1X1)
TOP VIEW
1: VOUT
2. GND
3. EN
4. VIN

EP

Note: The exposed pad should leave floating or tie to GND.

Example: AIC1755B-33GU5TR
 3.3V Version, in Green SOT23-5
Package and Tape & Reel PackingType ABSOLUTE MAXIMUM RATINGS
VIN Pin and EN Pin to GND Pin Voltage ............................................................................ -0.3V to 36V
VOUT Pin to GND Pin Voltage …….. .............................................................................. -0.3V to 14.0V
VOUT Pin to VIN Pin Voltage ............................................................................................. -36V to 0.3V
Storage Temperature Range ............................................................................................. -60ºC~150ºC
Lead Temperature (Soldering, 10 sec) ......................................................................................... 260ºC
Junction Temperature ................................................................................................................... 150ºC
Operating Ambient Temperature Range TA ......................................................................... -40ºC~85ºC
Thermal Resistance Junction to Case, RθJC

SOT23-5 .................................................... 115C/W
DFN-4(1x1) .................................................. 65C/W

Thermal Resistance Junction to Ambient, RθJA

SOT23-5 .................................................... 250C/W
DFN-4(1x1) ................................................ 195C/W(Assume no Ambient Airflow, no Heatsink)
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.

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AIC1755B

 ELECTRICAL CHARACTERISTICS(VIN=15V, VEN=5V, TA=25°C, unless otherwise specified) (Note 1)
PARAMETERTEST CONDITIONS

Supply Voltage
DC Output Voltage Accuracy

SYMBOLMIN.

VIN
ILOAD=0.1mA

TYP.

MAX.

UNIT

230

V

-22%

ILOAD=100mA, VOUT≥5V

VDROP

0.15

ILOAD=100mA, VOUT=3.3V

VDROP_3.3V

0.15

ILOAD=100mA, VOUT=1.8V

VDROP_1.8V

0.25

ILOAD=200mA, VOUT=1.8V

VDROP_1.8V

0.47

ILOAD=0mA, VOUT≤5V

IQ

2.2

ILOAD=0mA, 5V<VOUT≤12V

IQH

4.2

VEN=0V, VOUT=0V

ISD

0.01

EN Rising

VIH

EN Falling

VIL

EN Input Current

VEN=30V

IEN

10Line Regulation

ILOAD=1mA, 5V≤VIN≤30V

∆LINE

0.3%

Load Regulation

1mA≤ILOAD≤200mA

∆LOAD

0.1%

Output Current Limit

VOUT=0V

400mA

PSRR

70dB

Dropout Voltage

Dropout Voltage
Ground Current
Shutdown GND Current
Enable Threshold Voltage

Power Supply Rejection Ratio

VOUT=5V, ILOAD=1mA,
VIN=12V, f=100Hz

ILIM

VV
µA
0.5

2.0
0.6

201

100

µA
VnA

Thermal Shutdown Temperature

ILOAD=10mA

TSD

160℃

Thermal Shutdown Hysteresis

ILOAD=10mA

TSD

15℃

Note 1. Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).

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AIC1755B

 TYPICAL PERFORMANCE CHARACTERISTICS

Fig. 1 Output Voltage vs. Temperature

Fig. 2 Output Voltage vs. Input Voltage

Fig. 3 Output Voltage vs. Load Current

Fig. 4 Enable vs. Input Voltage

Fig. 5 Ground Current vs. Temperature

Fig. 6 Ground Current vs. Input Voltage

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AIC1755B

 TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

Fig. 7 Load Transient Response

Fig. 8 Current Limit Response

Fig. 9 VOUT Turn on by VIN Quick Power Up

Fig. 10 Line Transient ResponseFig. 11 VOUT Turn on by EN

Fig. 12 VOUT Turn off by EN

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AIC1755B

 BLOCK DIAGRAM

Functional Block Diagram of AIC1755B

 PIN DESCRIPTIONVIN
GND VOUT EN
NC-Input of Supply Voltage.
Ground.
Output of the Regulator.
Enable Control Input.
No Internal Connection.

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AIC1755B

 APPLICATION INFORMATION
theINPUT-OUTPUT CAPACITOR REQUIREMENTS
The external input and output capacitors of AIC1755B
series must be properly selected for stability andjunction

temperature

cools

downbyapproximately 15°C, the regulator will automaticallyresume operation.

performance. Use a 1μF or larger input capacitor andTHERMAL APPLICATION

place it close to the IC's VIN and GND pins. Any

For continuous operation, do not exceed the absoluteoutput capacitor meeting the minimum 1mΩ ESR

maximum junction temperature. The maximum power(Equivalenteffectivedissipation depends on the thermal resistance of thecapacitance between 1μF and 22μF requirement may

IC package, PCB layout, rate of surrounding airflow,

be used. Place the output capacitor close to the IC'sandVOUT and GND pins. Increasing capacitance andtemperature. The maximum power dissipation can be

decreasing ESR can improve the circuit's PSRR andcalculated as below:

line transient response.

PD(MAX) = (TJ(MAX)−TA) / (RJA)

SeriesResistance)

anddifference

betweenjunctionandambient

Where TJ(MAX) is the maximum allowable junction

CURRENT LIMITThe AIC1755B series contain the current limiter ofoutput power transistor, which monitors and controls
the transistor, limiting the output current to 400mA(typical). The output can be shorted to groundindefinitely without damaging the part.

temperature, and TA is the ambient temperature
suitable in application.
Power dissipation (PD) is equal to the product of theoutput current and the voltage drop across the output
pass element, as shown in the equation below:
PD = (VIN – VOUT) × IOUT.

DROPOUT VOLTAGE
The AIC1755B series use a PMOS pass transistor toachieve low dropout. When (VIN – VOUT) is less thanthe dropout voltage (VDROP), the PMOS pass device isin the linear region of operation and the input-tooutput resistance is the RDS(ON) of the PMOS passelement. VDROP scales approximately with the outputcurrent because the PMOS device behaves as aresistor in dropout condition.
As any linear regulator, PSRR and transient response
are degraded as (VIN – VOUT) approaches dropoutcondition.
OTP (OVER TEMPERATURE PROTECTION)
The

over

temperature

protection

function

LAYOUT CONSIDERATION
By placing input and output capacitors on the sameside of the PCB as the LDO, and placing them as
close as is practical to the package can achieve thebest performance. The ground connections for input
and output capacitors must be back to the AIC1755B
ground pin using as wide and as short of a copper
trace as is practical.
Connections using long trace lengths, narrow trace
widths, and/or connections through via must beavoided.

Theseaddparasitic

resistancethatresults

ininductances

worseandperformance

especially during transient conditions.
ofAIC1755B series will turn off the P-MOSFET when
the junction temperature exceeds 160°C (typ.). Once

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AIC1755B

 PHYSICAL DIMENSIONS SOT23-5

AAE

E1Dee1SEE VIEW B

WITH PLATING

cA

A2b

SECTION A-A0.25

A1BASE METALGAUGE PLANESEATING PLANE

L1θLVIEW B

Note : 1. Refer to JEDEC MO-178AA.
2. Dimension "D" does not include mold flash, protrusions
or gate burrs. Mold flash, protrusion or gate burrs shall not
exceed 10 mil per side.
3. Dimension "E1" does not include inter-lead flash or protrusions.
4. Controlling dimension is millimeter, converted inch
dimensions are not necessarily exact.

SOT23-5

SYM
B
OL

MIN.

MAX.

A

0.95

1.45

A1

0.00

0.15

A2

0.90

1.30

b0.30

0.50

c

0.08

0.22

D

2.80

3.00

E

2.60

3.00

E1

1.50

1.70MILLIMETERS

e0.95 BSC

e1

1.90 BSC

L0.30

θ

0.60
0.60 REF

L10°8°8AIC1755B
 DFN-4(1x1x0.37-0.65mm)

Note:
Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other thancircuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We
reserve the right to change the circuitry and specifications without notice.
Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems aredevices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, whenproperly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to theuser.

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