AAT3112 500mA High Efficiency Charge Pump for White LED Flash Applications

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 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. 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.

技术特性

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

订购信息 Ordering Information

AAT3112

应用领域 APPLICATION

General-Purpose High-Current Boost Supply
White LED Backlighting
White LED Photo Flash

功能框图 Functional Block Diagram

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT3112 数据资料DataSheet下载:pdf	Rev.V2	2 页