AAT3112 Datasheet | Skyworks Solutions

DATA SHEET 500m A High Efficiency Charge Pump for White LED Flash Applications General Description The AAT3112 is a member of Skyworks’ 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 200m A output load current and up to 500m A of pulsed current. The 500m A 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. 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 start-up. A high charge pump switching frequency enables the use of very small external capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1μA. The AAT3112 is available in a Pb-free 16-pin 3x3mm QFN package and is rated over the -40°C to +85°C temperature range. Features - Input Voltage Range: - AAT3112-5.0: 2.7V to 5.0V - AAT3112-4.5: 2.7V to 4.5V - Up to 500m A Peak Output Current - 200m A 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 Typical Application VIN CIN Enable Light Enable Flash C1 = 1μF C2 = 1μF C1+ C1- C2+...