ADP3402 Analog Devices, ADP3402 Datasheet

ADP3402

Manufacturer Part Number

ADP3402

Description

GSM Power Management System

Manufacturer

Analog Devices

Datasheet

1.ADP3402.pdf (12 pages)

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GENERAL DESCRIPTION

The ADP3402 is a multifunction power management system IC

optimized for GSM cell phones. The wide input voltage range of

3.0 V to 7.0 V makes the ADP3402 ideal for both single cell

Li-Ion and three cell NiMH designs. The current consumption of

the ADP3402 has been optimized for maximum battery life,

featuring a ground current of only 230 A when the phone is in

standby (digital LDO, analog LDO, and SIM card supply active).

An undervoltage lockout (UVLO) prevents the startup when

there is not enough energy in the battery. All four integrated

LDOs are optimized to power one of the critical sub-blocks of the

phone. Their novel anyCAP™ architecture requires only very

small output capacitors for stability, and the LDOs are insensitive

to the capacitors’ equivalent series resistance (ESR). This makes

them stable with any capacitor, including ceramic (MLCC) types

for space-restricted applications.

A step-up converter is implemented to supply both the SIM

module and the level translation circuitry to adapt logic signals

for 3 V and 5 V SIM modules. Sophisticated controls are avail-

able for power-up during battery charging, keypad interface and

charging of an auxiliary back-up capacitor for the real-time clock.

These allow an easy interface between ADP3402, GSM proces-

sor, charger, and keypad. The 28-lead TSSOP package has been

thermally enhanced to maximize power dissipation capability.

Furthermore, a reset circuit and a thermal shutdown function

have been implemented to support reliable system design.

anyCAP is a trademark of Analog Devices, Inc.

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

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

otherwise under any patent or patent rights of Analog Devices.

FEATURES

Handles all GSM Baseband Power Management

Four LDOs Optimized for Speciﬁc GSM Subsystems

Charges Back-Up Capacitor for Real-Time Clock

Charge Pump and Logic Level Translators for 3 V and 5 V

Thermally Enhanced 6.1 mm 28-Lead TSSOP Package

APPLICATIONS

GSM/DCS/PCS Handsets

TeleMatic Systems

ICO/Iridium Terminals

Functions

GSM SIM Modules

GSM Power Management System

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

Tel: 781/329-4700

Fax: 781/326-8703

PWRONKEY

ANALOGON

PWRONIN

SIMPROG

RESETIN

RESCAP

SIMGND

SIMBAT

DATAIO

CHRON

SIMON

ROWX

CLKIN

CAP

CAP+

FUNCTIONAL BLOCK DIAGRAM

ADP3402

TRANSLATION

LOGIC LEVEL

CHARGE

World Wide Web Site: http://www.analog.com

PUMP

SEQUENCING

PROTECTION

POWER-UP

LOGIC

VBAT

AND

I/O

CLK

REF

RST

ADP3402

XTAL OSC

RTC LDO

ANALOG

DIGITAL

BUFFER

LDO

VCC

RESET

VRTC

VTCXO

VCCA

VSIM

REFOUT

DGND

AGND

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