REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© 2003 Analog Devices, Inc. All rights reserved.

ADP3522

GSM Power Management System

FEATURES

Handles all GSM Baseband Power Management

6 LDOs Optimized for Specific GSM Subsystems

Li-Ion Battery Charge Function

Optimized for the AD20msp430 Baseband Chipset

Reduced Package Size: 5 mm

5 mm LFCSP-32

APPLICATIONS

GSM/GPRS Handsets

FUNCTIONAL BLOCK DIAGRAM

PWRONKEY

PWRONIN

TCXOEN

CHRDET

EOC

BATSNS

VRTCIN

ROWX

CHGEN

ISENSE

CHRIN

RESCAP

VBAT VBAT2

POWER-UP

SEQUENCING

AND

PROTECTION

LOGIC

SIMEN

SIMVSEL

DGND

VCORE

AGND

MVBAT

VTCXO

VAN

VMEM

VRTC

REFOUT

VSIM

GATEDR

GATEIN

RESET

ADP3522

SIM

LDO

DIGITAL

CORE LDO

ANALOG

LDO

TCXO

LDO

MEMORY

LDO

RTC

LDO

REF

BUFFER

BATTERY

VOLTAGE

DIVIDER

BATTERY

CHARGE

CONTROLLER

GENERAL DESCRIPTION

The ADP3522 is a multifunction power system chip optimized

for GSM/GPRS handsets, especially those based on the Analog

Devices AD20msp430 system solution with 1.8 V digital

baseband processors, such as the AD6525, AD6526, and

AD6528. It contains six LDOs, one to power each of the critical

GSM subblocks. Sophisticated controls are available for power-

up during battery charging, keypad interface, and RTC alarm.

The charge circuit maintains low current charging during the

initial charge phase and provides an end of charge (EOC) signal

when a Li-Ion battery is being charged. This product also meets

the market trend of reduced size with a new LFCSP package.

Its footprint is only 5 mm

5 mm and yet offers excellent ther-

mal performance due to the exposed die attached paddle.

The ADP3522 is specified over the temperature range of

–20

°C to +85°C.