General Description

The AAT3236 is a MicroPower low dropout (LDO) linear regulator designed to deliver a continuous 300mA output load current and is capable of handling 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 circuitry. Other features include low quiescent current, typically 100µA, and low dropout voltage, typically 300mV at full output load current. The device has internal output short-circuit protection and thermal shutdown to prevent damage under extreme conditions.

Features

• 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