AAT3682

DATA SHEET

Li-Ion/Polymer Linear Battery Charger

1

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012

General Description

The AAT3682 is a lithium-ion/polymer linear battery

charger. It is designed for compact portable applications

with a single-cell battery. The AAT3682 precisely regu-

lates battery charge voltage and charge current, and

offers an integrated pass device, minimizing the number

of external components required.

The AAT3682 charges the battery in three different

phases: preconditioning, constant current, and constant

voltage. In preconditioning mode, the charge current has

two different levels and is controlled by one external pin.

Battery charge temperature and charge state are care-

fully monitored for fault conditions. A battery charge

stable monitor output pin is provided to indicate the bat-

tery charge status through a display LED or interface to

a system controller. The AAT3682 has a sleep mode

option for when the input supply is removed. In this

mode, it draws only 2.0μA of typical current.

The AAT3682 is available in a Pb-free, 16-pin QFN44

package and is specified over the -20°C to +70°C tem-

perature range.

Features

• Low Quiescent Current, Typically 0.5mA

• 1% Accurate Preset Voltage

• Up to 1A of Charging Current

• Integrated Pass Device

• Battery Temperature Monitoring

• Fast Trickle Charge Option

• Deep Discharge Cell Conditioning

• LED Charge Status Output or System Microcontroller

Serial Interface

• Power-On Reset

• Lower Power Sleep Mode

• Status Outputs for LED or System Interface Indicates

Charge and Fault Conditions

• Temperature Range: -20°C to +70°C

• 16-Pin QFN44 Package

Applications

• Cellular Telephones

• Digital Still Cameras

• Hand-Held PCs

• MP3 Players

• Personal Data Assistants (PDAs)

Typical Application

VP

Gate

DRV

CSI

VCC

VSS

BAT

T2X

BSENSE

TS

STAT

R

SENSE

C

C

LED 1

R

BATT+

BATT-

R

T1

VP

R

T2

TEMP

Adapter

R

4

R

3