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AAT3236

300mA CMOS High Performance LDO

Analog Technology Inc 

AAT3236

300mA CMOS High Performance LDO

General Description

Features

PowerLinear™

The AAT3236 is a MicroPower™ Low Dropout

Linear Regulator designed to deliver a continuous

300mA output load current and is capable of han-

dling short duration current peaks up to 500mA.

With a very small footprint SOT23-5 package it is

ideally suited for portable applications where low

noise, high power supply ripple rejection, extended

battery life and small size are critical. The AAT3236

features fast transient response and low output self

noise for powering sensitive RF circuitry. Other fea-

tures include low quiescent current, typically

100µA, and low dropout voltage, typically 300mV at

full output load current. The device has internal out-

put short circuit protection and thermal shutdown to

prevent damage under extreme conditions.

The AAT3236 also features a low-power shutdown

mode for longer battery life. A bypass pin is pro-

vided to improve PSRR performance by connect-

ing an external capacitor from the AAT3236's refer-

ence output to ground.

The AAT3236 is available in a space saving

SOT23-5 or SC70JW-8 package in 7 factory pro-

grammed voltages of 2.5V, 2.7V, 2.8V, 2.85V, 3.0V,

3.3V, or 3.5V.

• 500mA Peak Output Current

• Low Dropout - Typically 300mV at 300mA

• Guaranteed 300mA Output

• High accuracy ±1.5%

• 100µA Quiescent Current

• High Power Supply Ripple Rejection

• 70 dB at 1kHz

• 50 dB at 10kHz

• Very low self noise 45µVrms/rtHz

• Noise reduction bypass capacitor

• Short circuit protection

• Over-Temperature protection

• Shutdown mode for longer battery life

• Low temperature coefficient

• 7 Factory programmed output voltages

• SOT-23 5-pin or SC70JW 8-pin package

Applications

• Cellular Phones

• Notebook Computers

• Portable Communication Devices

• Personal Portable Electronics

Typical Application

VIN

VOUT

IN AAT3236 OUT

ON/OFF

EN

1µF

GND

BYP

10nF

2.2µF

GND

GND

3236.2001.11.0.9

1

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