AAT2552_08 Datasheet

IC型號(hào)：
AAT2552_08
PDF描述：
Total Power Solution for Portable Applications
文件大?。?/label>
824.48KB
PDF頁數(shù)：
31頁
芯片廠家：
ANALOGICTECH

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PRODUCT DATASHEET

AAT2552178

SystemPower

General Description

Total Power Solution for Portable Applications

Features

鈥?Battery Charger:

鈻?/div>

Input Voltage Range: 4V to 7.5V

鈻?/div>

Programmable Charging Current up to 500mA

鈻?/div>

Highly Integrated Battery Charger

鈥?Charging Device

鈥?Reverse Blocking Diode

鈥?Current Sensing

鈥?Step-Down Converter:

鈻?/div>

Input Voltage Range: 2.7V to 5.5V

鈻?/div>

Output Voltage Range: 0.6V to V

鈻?/div>

300mA Output Current

鈻?/div>

Up to 96% Efficiency

鈻?/div>

45渭A Quiescent Current

鈻?/div>

1.5MHz Switching Frequency

鈻?/div>

120渭s Start-Up Time

鈥?Linear Regulator:

鈻?/div>

300mA Output Current

鈻?/div>

Low Dropout: 400mV at 300mA

鈻?/div>

Fast Line and Load Transient Response

鈻?/div>

High Accuracy: 鹵1.5%

鈻?/div>

85渭A Quiescent Current

鈥?Short-Circuit, Over-Temperature, and Current Limit

Protection

鈥?TDFN34-16 Package

鈥?-40擄C to +85擄C Temperature Range

The AAT2552 is a fully integrated 500mA battery char-

ger, a 300mA step-down converter, and a 300mA low

dropout (LDO) linear regulator. The input voltage range

is 4V to 7.5V for the battery charger and 2.7V to 5.5V

for the step-down converter and linear regulator, making

it ideal for applications operating with single-cell lithium-

ion/polymer batteries.

The battery charger is a complete constant current/con-

stant voltage linear charger. It offers an integrated pass

device, reverse blocking protection, high accuracy cur-

rent and voltage regulation, charge status, and charge

termination. The charging current is programmable via

external resistor from 30mA to 500mA. In addition to

these standard features, the device offers over-voltage,

current limit, and thermal protection.

The step-down converter is a highly integrated converter

operating at a 1.5MHz switching frequency, minimizing

the size of external components while keeping switching

losses low. The output voltage ranges from 0.6V to the

input voltage.

The AAT2552 linear regulator is designed for high speed

turn-on and turn-off performance, fast transient response,

and good power supply ripple rejection. Delivering up to

300mA of load current, it includes short-circuit protec-

tion and thermal shutdown.

The AAT2552 is available in a Pb-free, thermally-

enhanced TDFN34-16 package and is rated over the

-40擄C to +85擄C temperature range.

Applications

鈥?/div>

Bluetooth鈩?Headsets

Cellular Phones

GPS

Handheld Instruments

MP3 and Portable Music Players

PDAs and Handheld Computers

Portable Media Players

Typical Application

Adapter/USB Input

Enable

OUTB

FBB1

OUTB

4.7渭F

FBB2

OUTA

FBA1

OUTA

FBA2

FBA

GND

FBB

OUTA

ADP

STAT

EN_BAT

INB

ENB

INA

ENA

AAT2552

MODE

BAT

ISET

System

BATT+

OUT

SET

Battery

Pack

BATT-

2552.2008.02.1.2

www.analogictech.com

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