Datasheet > AAT2556

AAT2556

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		转换器电池便携式
页数	文件大小	规格书
29页	745K
描述
Battery Charger and Step-Down Converter for Portable Applications

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AAT2556 数据手册

AAT2556

Battery Charger and Step-Down

Converter for Portable Applications

™

SystemPower

General Description

Features

The AAT2556 is a member of AnalogicTech's Total

Power Management IC™ (TPMIC™) product fam-

ily. It is a fully integrated 500mA battery charger

plus a 250mA step-down converter. The input volt-

age range is 4V to 6.5V for the battery charger and

2.7V to 5.5V for the step-down converter, making it

ideal for single-cell lithium-ion/polymer battery-

powered applications.

•

Battery Charger:

— Input Voltage Range: 4V to 6.5V

— Programmable Charging Current up to

500mA

— Highly Integrated Battery Charger

— Charging Device

— Reverse Blocking Diode

Step-Down Converter:

•

— Input Voltage Range: 2.7V to 5.5V

— Output Voltage Range: 0.6V to V_IN

— 250mA Output Current

— Up to 96% Efficiency

— 30µA Quiescent Current

— 1.5MHz Switching Frequency

— 100µs Start-Up Time

Short-Circuit, Over-Temperature, and Current

Limit Protection

TDFN33-12 Package

The battery charger is a complete constant current/

constant voltage linear charger. It offers an inte-

grated pass device, reverse blocking protection,

high current accuracy and voltage regulation,

charge status, and charge termination. The charg-

ing current is programmable via external resistor

from 15mA to 500mA. In addition to standard fea-

tures, the device offers over-voltage, current limit,

and thermal protection.

•

The step-down converter is a highly integrated

converter operating at 1.5MHz of switching fre-

quency, minimizing the size of external compo-

nents while keeping switching losses low. It has

independent input and enable pins. The output

voltage ranges from 0.6V to the input voltage. The

feedback and control deliver excellent load regula-

tion and transient response with a small output

inductor and capacitor.

-40°C to +85°C Temperature Range

Applications

•

Bluetooth™ Headsets

Cellular Phones

Handheld Instruments

MP3 and Portable Music Players

PDAs and Handheld Computers

Portable Media Players

The AAT2556 is available in a Pb-free, thermally-

enhanced TDFN33-12 package and is rated over

the -40°C to +85°C temperature range.

Typical Application

Adapter / USB Input

ADP

VIN

EN_BUCK

BAT

STAT

BATT +

Enable

EN_BAT

V_OUT

L= 3.3µH

R_FB1

BATT -

ISET

C_OUT

R_SET

R_FB2

GND

2556.2006.05.1.0

12 3 4 5 6 7...29

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