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AAT3238

300mA MicroPower™ High Performance LDO Linear Regulator

Advanced Analogic Technologies 

PowerLinearTM

PRODUCT DATASHEET

AAT3238

300mA MicroPowerTM High Performance LDO Linear Regulator

General Description

The AAT3238 MicroPower low dropout (LDO) linear regu-

lator is ideally suited for portable applications where

very fast transient response, extended battery life, and

small size are critical. The AAT3238 has been specifically

designed for high-speed turn-on and turn-off perfor-

mance, fast transient response, good power supply rip-

ple rejection (PSRR), and is reasonably low noise, mak-

ing it ideal for powering sensitive circuits with fast

switching requirements.

Other features include low quiescent current, typically

70µA, and low dropout voltage, typically less than

400mV at the maximum output current level of 300mA.

The device is output short-circuit protected and has a

thermal shutdown circuit for additional protection under

extreme operating conditions.

The AAT3238 also features a low-power shutdown mode

for extended battery life. A reference bypass pin has

been provided to improve PSRR performance and output

noise by connecting a small external capacitor from the

AAT3238’s reference output to ground.

The AAT3238 is available in a Pb-free, space-saving

6-pin SOT23 or 8-pin SC70JW package in factory-pro-

grammed voltages.

Features

• Low Dropout: 400mV at 300mA

• Guaranteed 300mA Output

• High Accuracy: ±1.5%

• 70µA Quiescent Current

• Fast Line and Load Transient Response

• High-Speed Device Turn-On and Shutdown

• High Power Supply Ripple Rejection

• Low Self Noise

• Short-Circuit Protection

• Over-Temperature Protection

• Uses Low Equivalent Series Resistance (ESR) Ceramic

Capacitors

• Noise Reduction Bypass Capacitor

• Shutdown Mode for Longer Battery Life

• Low Temperature Coefficient

• Factory-Programmed Output Voltages

• SOT23 6-Pin or SC70JW 8-Pin Package

Applications

• Cellular Phones

• Digital Cameras

• Notebook Computers

• Personal Portable Electronics

• Portable Communication Devices

Typical Application

VIN

IN

ON/OFF EN

1µF

AAT3238

GND

OUT

BYP

10nF

VOUT

2.2µF

GND

GND

3238.2008.05.1.7

www.analogictech.com

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