austria
micro
systems
AS3603
Multi-Standard Power Management Unit
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 30µV
RMS
from 100Hz to 100kHz
!
Line/Load Regulation – < 1mV static and < 10mV tran-
sient
!
Power Supply Rejection – > 70dB @ 1kHz
!
!
Fact Sheet
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 @ 4Ω -stereo
- 1W @ 8Ω -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
!
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 @ 8Ω) 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.
!
!
Wide Battery Supply Range 3.0V - 5.5V
!
Four General Purpose Switches (1Ω 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 7µA (2.5V Always On)
!
Overcurrent and Thermal Protection
!
0.35µ CMOS Solution
!
48-pin, 6x6mm QFN Package (0.4mm pitch)
!
48-pin, 7x7mm QFN Package (0.5mm pitch)
!
2.1 Watt Power Dissipation @ T
AMBIENT
= 70ºC
!
3 Application
This data sheet is applicable for device versions:
AS3603-FxC
!
AS3603-GxC
!
Multi-standard power management for mobile phones,
PDAs, and 1-cell Li+ or 3 to 4-cell Ni-Mh powered devices.
Copyright © 1997-2004, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe.
www.austriamicrosystems.com
Revision 2.0
1-2
Analog electronics
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