500mA High Efficiency Charge Pump for White LED Flash Applications

Manufacturer's part number :


Manufacturer Skyworks


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 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.

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    • 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

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Features Similar products
Typ. Active O/P Current (mA) 590  

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Output Voltage (V) 4.5  
Typ. Quiescent Current (µA) 26  
Input Voltage Range (V) 2.7 to 5  
Device Type Regulated  
Operating Temperature (°C) -40 to +85  
Package QFN33-16