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.

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