AAT2554IRN-CAQ-T1 Advanced Analogic Technologies, Inc., AAT2554IRN-CAQ-T1 Datasheet

AAT2554IRN-CAQ-T1

Manufacturer Part Number

AAT2554IRN-CAQ-T1

Description

Manufacturer

Advanced Analogic Technologies, Inc.

Datasheets

1.AAT2554IRN-CAP-T1.pdf (33 pages)

2.AAT2554IRN-CAQ-T1.pdf (33 pages)

3.AAT2554IRN-CAQ-T1.pdf (31 pages)

4.AAT2554IRN-CAQ-T1.pdf (29 pages)

Specifications of AAT2554IRN-CAQ-T1

Date_code

06+

Packing_info

TDFN34-16

Current page: 1 of 33
Download datasheet (2Mb)

General Description

The AAT2554 is a fully integrated 500mA battery

charger, a 250mA step-down converter, 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 step-down con-

verter and linear regulator, making it ideal for

applications operating with single-cell lithium-

ion/polymer batteries.

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.

The step-down converter is a highly integrated

converter operating at a 1.5MHz 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 AAT2554 linear regulator is designed for fast

transient response and good power supply ripple

rejection. Designed for 300mA of load current,

it includes short-circuit protection and thermal

shutdown.

The AAT2554 is available in a Pb-free, thermally-

enhanced TDFN34-16 package and is rated over

the -40°C to +85°C temperature range.

Typical Application

2554.2007.01.1.2

Adapter/USB Input

Enable

OUTB

FB1

FB2

Total Power Solution for Portable Applications

OUTA

L= 3.0µH

OUTA

ADP

STAT

EN_BAT

OUTA

AAT2554

GND

Features

•

Applications

•

VINB

VINA

ISET

ENB

ENA

BAT

Battery Charger:

— Input Voltage Range: 4V to 6.5V

— Programmable Charging Current up to

— Highly Integrated Battery Charger

Step-Down Converter:

— Input Voltage Range: 2.7V to 5.5V

— Output Voltage Range: 0.6V to V

— 250mA Output Current

— Up to 96% Efficiency

— 30µA Quiescent Current

— 1.5MHz Switching Frequency

— 100µs Start-Up Time

Linear Regulator:

— 300mA Output Current

— Low Dropout: 400mV at 300mA

— Fast Line and Load Transient Response

— High Accuracy: ±1.5%

— 70µA Quiescent Current

Short-Circuit, Over-Temperature, and Current

Limit Protection

TDFN34-16 Package

-40°C to +85°C Temperature Range

Bluetooth

Cellular Phones

Handheld Instruments

MP3 and Portable Music Players

PDAs and Handheld Computers

Portable Media Players

500mA

•

SET

Charging Device

Reverse Blocking Diode

Headsets

OUT

BATT+

BATT-

SystemPower

Battery

Pack

AAT2554

™

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