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AAT3112

AAT
Part Number AAT3112
Manufacturer AAT
Description High Efficiency Charge Pump
Published Apr 30, 2007
Detailed Description 500mA High Efficiency Charge Pump for White LED Flash Applications General Description The AAT3112 is a member of Analog...
Datasheet PDF File AAT3112 PDF File

AAT3112
AAT3112

Overview
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 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 Typical Application C1 = 1μF C1+ C1C2 = 1μF C2 + C2 VOUT1 VIN CIN VIN VOUT2 C OUT AAT3112 D1 Enable Light EN1 D2 D3 D4 Enable Flash EN2 GND RB 3112.
2007.
01.
1.
5 1 500mA High Efficiency Charge Pump for White LED Flash App...


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