Datasheet > AAT3119IJS-4.5-T1

AAT3119IJS-4.5-T1

更新时间： 2024-09-24 03:00:31

品牌	Logo	应用领域
ANALOGICTECH		泵
页数	文件大小	规格书
16页	481K
描述
High Efficiency 2X Charge Pump

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AAT3119

High Efficiency 2X Charge Pump

™

ChargePump

General Description

Features

The AAT3119 is a general purpose high efficiency

voltage regulated charge pump IC that can produce

output current levels up to 150mA. As a voltage

regulated output device, it may be used for general

voltage boost applications or to power white, RGB,

or flash type LEDs from a 2.7V to 5.5V input.

•

V_INRange: 2.7V to 5.5V

150mA of Output Current

— Peak Current up to 250mA

Regulated Output Voltage

1.2MHz Switching Frequency

Low Noise Constant Frequency Operation

<1.0µA of Shutdown Current

Automatic Soft Start

Small Application Circuit

Inductorless Boost

8-Pin SC70JW Package

-40°C to +85°C Temperature Range

•

The voltage doubling charge pump architecture of

the AAT3119 provides for a low external part count;

just three small ceramic capacitors are needed.

This makes the AAT3119 ideally suited for small

battery-powered applications. This device oper-

ates from a fixed high frequency 1.2MHz oscillator

which enables the use of very small external

capacitors, one 1µF flying capacitor, and two 1µF

bypass capacitors at IN and OUT.

Applications

The AAT3119 has built-in soft-start circuitry which

prevents excessive inrush current from the source

supply during startup. A low-current shutdown fea-

ture disconnects the load from V_INand reduces

quiescent current to less than 1.0µA when the

device is disabled. The AAT3119 is available in a

Pb-free, 8-pin SC70JW package and is rated over

the -40°C to +85°C temperature range.

•

Cellular Phones

Digital Cameras

Handheld Electronics

PDAs

White LED Backlighting

White LED Camera Flash

Typical Application

C_FLY

1µF

C+

C-

OUT

V_IN

V_OUT

C_OUT

1µF

C_IN

1µF

AAT3119

Enable

GND

3119.2005.08.1.1

12 3 4 5 6 7...16

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