AS3603

Multi-Standard Power Management Unit

Fact Sheet

Copyright © 1997-2004, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe.

www.austriamicrosystems.com

Revision 2.0

1 - 2

1 General Description

The AS3603 is a highly-integrated

, ultra-flexible CMOS power

management device designed specifically for portable devices

such as any standard of mobile phones, PDAs, CD players,

digital cameras and other devices powered by 1-cell lithium-

based or 3- 4-cell nickel-based batteries.

The device incorporates low dropout regulators (LDOs),

DC/DC converters, a complete battery charger, and an

audio power amplifier onto one die.

The linear analog LDOs feature extremely high perfor-

mance regarding:

!

Noise – typ 30

!

Line/Load Regulation – < 1mV static and < 10mV tran-

sient

!

Power Supply Rejection – > 70dB @ 1kHz

The integrated Step Down DC/DC Converter does not

require an external Schottky diode yet provides very high

efficiency (up to 95%) throughout the whole operating

range. It can be either used as a stand-alone device or as a

pre-regulator for LDOs to increase overall device efficiency.

A Step Up DC/DC Converter is included to supply power for

white LEDs together with programmable current sources to

control LED brightness.

A low-distortion audio power amplifier (1 Watt @ 8

Ω) sup-

ports handsfree mobile phone operation and HiFi ring-

tones.

The device also features a chemistry-independent battery

charger including fuel gauge circuitry, automatic trickle

charging, programmable constant current, constant voltage

and pulse charging.

The AS3603 is controlled via a serial interface and inte-

grates all necessary system specific functions such as

Reset, Watchdog, and Power-On Detection.

Regulator output voltages are programmable by software.

Eight preset startup timings can be selected by an external

resistor.

This data sheet is applicable for device versions:

!

AS3603-FxC

!

AS3603-GxC

2 Key Features

!

Ten Programmable High Performance LDOs

- 2 Digital Low Power LDOs (0.75-2.5V, 200mA)

- 3 RF Low Noise LDOs (1.85 - 3.4V, 150mA)

- 2 RF Low Noise LDOs (1.85 - 3.4V, 75mA)

- 1 SIM Low Power LDO (3.0V, 20mA)

- 1 Periphery Low Noise LDO (2.5 - 3.2V, 150mA)

- 1 Low Power LDO (2.5V, 10mA)

!

Programmable High Efficiency DC/DC Converters

- Step Down: 1.0 - 3.0V, up to 500mA

- Step Up: 15V, 45mA, (for White LEDs)

!

Stereo Audio Power Amplifier

-0.5W @ 4

Ω -stereo

-1W @ 8

Ω -bridged

- Digital Volume Control, 3dB Steps

- Click- and Pop-Less Start-Up and Power-Down

!

Complete Chemistry-Independent Battery Charger

- Integrated Fuel Gauge

- Automatic Trickle Charging

- Programmable Constant Current Charging

- Programmable Constant Voltage Charging

- Programmable Pulse Charging

- Safety Functions (Low Battery Shutdown)

- Operation without Battery

- No-Battery detection

!

Four 8-Bit Programmable Current Sources

(0.625mA - 160mA) support:

- Buzzer

-Vibrator

-LEDs

!

Wide Battery Supply Range 3.0V - 5.5V

!

Four General Purpose Switches (1

Ω and 2Ω)

!

Four Programmable General Purpose I/O Pins

!

On-Chip Bandgap Tuning for High Accuracy (+/-1%)

!

Integrated Programmable Watchdog (7.5 - 1900ms)

!

Programmable Reset (10 - 110ms)

!

Shutdown Current typ 7

µA (2.5V Always On)

!

Overcurrent and Thermal Protection

!

0.35

µ CMOS Solution

!

48-pin, 6x6mm QFN Package (0.4mm pitch)

!

48-pin, 7x7mm QFN Package (0.5mm pitch)

!

3 Application

Multi-standard power management for mobile phones,

PDAs, and 1-cell Li+ or 3 to 4-cell Ni-Mh powered devices.