Power Management Unit for Mobile Phones

AS3653

© 20 04 a ust ri amic rosyst ems AG. All ri ght s res e rve d.

March 20045

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PRODUCT BRIEF

General Description

The AS3653 device is a highly integrated solution for

power supply generation and monitoring, battery

management

including

charging

and

SIM

card

communication. It is controlled via a serial control interface

and integrates all necessary system specific functions such

as clock, reset and interrupt generation, voltage and

temperature monitoring, accessory detection and On/Off

control.

Key Features

Supply Voltage Generation

• 1 Analogue High Current LDO (1.85…3.4V, 250mA)

• 1 Analogue Low Noise LDO (1.85…3.4V, 150mA)

• 1 Analogue Low Noise LDO (1.85…3.4V, 100mA)

• 2 RF Low Noise LDOs (1.85…3.4V, 100mA)

• 1 Analogue Low Noise LDO (1.85…3.4V, 10mA)

• 3 Digital Low Power LDOs (150mA)

• 1 SIM Card Supply LDO (1.8 / 3.0V, 20mA)

• 1 Low Noise, High PSRR Microphone Bias Generator

Complete Chemistry Independent Charger

• Autonomous Trickle Charge Mode with 60min Timeout

• Programmable Constant Current Charging

• Programmable Constant Voltage / Pulse Charging

• Integrated Gas Gauge

• Overvoltage protection: Battery and Charger Voltage

• Operation without battery

• Battery presence indication

• Programmable backup battery charger

SIM Card Interface

• Transparent SIM Card Interface with signal level

translators and enhanced ESD protection

System Control

• Clock Generation including low power 32kHz crystal

oscillator

• RTC with Alarm Function

• Programmable Reset Generation for System Controller

• Programmable Interrupt Controller

• Programmable Battery Voltage Monitor

• Temperature Sensor to prevent failure of the device

due to excess power dissipation

• 2 programmable Accessory Recognition Input Pins

• On/Off Control Module

• Programmable Watchdog Module

• 2 General Purpose Pulse Width Modulator (PWM)

Outputs with programmable frequency and duty cycle

• 2 General Purpose LED Pattern Generator Outputs

with programmable pattern and repetition period

• 8 General Purpose Input / Output Pins

• Wide Battery Supply Range 3.0…5.5V

• Serial Control Interface

• On-Chip Bandgap Tuning for High Accuracy (±1%)

• Excess Current and Thermal Protection

• 0.35µm CMOS Solution

• QFN48 package

Applications

• Power Management Unit for GSM Mobile Phones

• 1 Cell Li+ or 3…4 Cell NiMH powered devices