Datasheet > AAT3112_07

AAT3112_07

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		闪光灯泵
页数	文件大小	规格书
16页	516K
描述
500mA High Efficiency Charge Pump for White LED Flash Applications

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AAT3112_07 数据手册

AAT3112

500mA High Efficiency Charge Pump

for White LED Flash Applications

™

ChargePump

General Description

Features

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 cur-

rent 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 V_INand V_OUT) makes the AAT3112 ide-

ally suited for small battery-powered applications.

•

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

I_Q<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

•

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 circuit-

ry 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 V_INand 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.

Applications

•

General-Purpose High-Current Boost Supply

White LED Backlighting

White LED Photo Flash

Typical Application

C1 = 1μF

C2 = 1μF

C1⁺

VIN

C1^-

C2⁺C2^-

VOUT1

V_IN

C_IN

C_OUT

VOUT2

AAT3112

EN1

EN2

Enable Light

Enable Flash

R_B

GND

3112.2007.01.1.5

12 3 4 5 6 7...16

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