ADP3404ARU Analog Devices, ADP3404ARU Datasheet

ADP3404ARU

Manufacturer Part Number

ADP3404ARU

Description

GSM Power Management System

Manufacturer

Analog Devices

Datasheet

1.ADP3404ARU.pdf (12 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

ADP3404ARU

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AMD

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GENERAL DESCRIPTION

The ADP3404 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 ADP3404 ideal for both single cell

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

of the ADP3404 has been optimized for maximum battery life,

featuring a ground current of only 230 µA 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

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 ADP3404, GSM proces-

sor, charger, and keypad. Furthermore, a reset circuit and a

thermal shutdown function have been implemented to support

reliable system design.

anyCAP is a registered trademark of Analog Devices, Inc.

architecture requires only very

GSM Power Management System

PWRONKEY

ANALOGON

PWRONIN

SIMPROG

RESETIN

RESCAP

SIMGND

SIMBAT

DATAIO

CHRON

SIMON

ROWX

CLKIN

CAP

CAP+

FUNCTIONAL BLOCK DIAGRAM

ADP3404

TRANSLATION

LOGIC LEVEL

CHARGE

PUMP

SEQUENCING

PROTECTION

POWER-UP

VBAT

LOGIC

AND

I/O

CLK

REF

RST

ADP3404

XTAL OSC

BUFFER

RTC LDO

ANALOG

DIGITAL

LDO

VCC

RESET

VRTC

VTCXO

VCCA

VSIM

REFOUT

DGND

AGND

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