General Description

The AAT3112 is a member of AnalogicTechs Total Power Management IC? (TPMIC?) family. It is a dual voltage doubling charge pump that provides a regulated output voltage. It operates with an input voltage range of 2.7 to 5.0 volts. The device can deliver a constant 200mA output load current and up to 500mA of pulsed current. The 500mA peak current capability of the AAT3112 makes it ideal for white LED flash applications. A low external parts count (two 1μF flying capacitors and two small capacitors at VIN and VOUT) makes the AAT3112 ideally suited for small battery-powered applications.

特性 Features

? Input Voltage Range:

— AAT3112-5.0: 2.7V to 5.0V

— AAT3112-4.5: 2.7V to 4.5V

? Up to 500mA Peak Output Current

? 200mA Continuous Output Current

? IQ <1μA in Shutdown

? Regulated 4.5V or 5.0V Output

? 26μA of Quiescent Current

? Small Application Circuit

? Automatic Soft Start

? No Inductors

? Short-Circuit/Over-Temperature Protection

? 16-Pin 3x3mm QFN Package

? Temperature Range: -40°C to +85°C

Applications

? General-Purpose High-Current Boost Supply

? White LED Backlighting

? White LED Photo Flash