AAT3112

500mA High Efficiency Charge Pump for White LED Flash Applications General Description The AAT3112 is a member of AnalogicTech's 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. AAT3112 Features ChargePump™ The AAT3112 has a thermal management system to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry prevents excessive inrush current during startup. A high charge pump switching frequency Applications enables the use of very small external capacitors. A low current shutdown feature disconnects the General-Purpose High-Current Boost Supply load from VIN and reduces quiescent current to less White LED Backlighting than 1μA. The AAT3112 is available in a Pb-free White LED Photo Flash 16-pin 3x3mm QFN package and is rated overwww.DataSheet4U.com the -40°C to +85°C temperature range. 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 200...