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AAT3236

300mA CMOS High Performance LDO

Advanced Analogic Technologies 

General Description

AAT3236

300mA CMOS High Performance LDO

Features

PowerLinear™

The AAT3236 is a MicroPower low dropout (LDO)

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 (PSRR),

extended battery life, and small size are critical.

The AAT3236 features fast transient response and

low output self noise for powering sensitive RF cir-

cuitry. Other features include low quiescent cur-

rent, typically 100µA, and low dropout voltage, typ-

ically 300mV at full output load current. The device

has internal output short-circuit protection and ther-

mal 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 device reference

output to ground.

The AAT3236 is available in a Pb-free, space-sav-

ing SOT23-5 or SC70JW-8 package in nine facto-

ry-programmed voltages: 2.5V, 2.7V, 2.8V, 2.85V,

3.0V, 3.1V, 3.3V, 3.5V, or 3.6V.

• 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

— 70dB at 1kHz

— 50dB at 10kHz

• Very Low Self Noise: 45µVrms

• Noise Reduction Bypass Capacitor

• Short-Circuit Protection

• Over-Temperature Protection

• Shutdown Mode for Longer Battery Life

• Low Temperature Coefficient

• Nine Factory-Programmed Output Voltages

• SOT23 5-Pin or SC70JW 8-Pin Package

Applications

• Cellular Phones

• Notebook Computers

• Personal Portable Electronics

• Portable Communication Devices

Typical Application

VIN

VOUT

IN AAT3236 OUT

ON/OFF

EN

1μF

GND

BYP

10nF

2.2μF

GND

GND

3236.2007.03.1.4

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