Datasheet > AAT2557

AAT2557

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		稳压器电池便携式
页数	文件大小	规格书
22页	460K
描述
500mA Battery Charger and 300mA LDO Regulator for Portable Systems

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AAT2557 数据手册

AAT2557

500mA Battery Charger and 300mA

LDO Regulator for Portable Systems

™

SystemPower

General Description

Features

The AAT2557 is a fully integrated 500mA battery

charger and a 300mA low dropout (LDO) linear

regulator. The input voltage range is 4V to 6.5V for

the battery charger and 2.7V to 5.5V for the linear

regulator, making it ideal for applications operating

with single-cell lithium-ion/polymer batteries.

•

Battery Charger:

— Input Voltage Range: 4V to 6.5V

— Programmable Charging Current up to

500mA

— Highly Integrated Battery Charger

•

Charging Device

Reverse Blocking Diode

The battery charger is a complete constant cur-

rent/constant voltage linear charger. It offers an

integrated pass device, reverse blocking protec-

tion, high accuracy current and voltage regulation,

charge status, and charge termination. The charg-

ing current is programmable via external resistor

from 15mA to 500mA. In addition to these stan-

dard features, the device offers over-voltage, cur-

rent limit, and thermal protection.

•

Linear Regulator:

— 300mA Output Current

— Low Dropout: 400mV at 300mA

— Fast Line and Load Transient Response

— High Accuracy: 1.5ꢀ

— 70µA Quiescent Current

Short-Circuit, Over-Temperature, and Current

Limit Protection

TSOPJW-14 Package

-40°C to +85°C Temperature Range

•

The linear regulator is designed for fast transient

response and good power supply ripple rejection.

Capable of up to 300mA load current, it includes

short-circuit protection and thermal shutdown.

The AAT2557 is available in a Pb-free, thermally-

enhanced TSOPJW-14 package and is rated over

the -40°C to +85°C temperature range.

Applications

•

Bluetooth Headsets

Cellular and DECT Phones

Handheld Instruments

MP3 and Portable Music Players

PDAs and Handheld Computers

Portable Media Players

Typical Application

Adapter/USB Input

ADP

INLDO

STAT

C_INLDO

EN_BAT

Charger Enable

AAT2557

BATT+

BATT-

BAT

ENLDO

LDO Enable

V_OUTLDO

OUTLDO

BYP

C_BAT

ISET

C_OUTLDO

R_SET

C_BYP

GND

Battery

Pack

2557.2007.06.1.0

12 3 4 5 6 7...22

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