Sept.2002
Page 1 of 1
General Description
The AS3601 is a highly integrated CMOS Power
Management Unit to supply multi-standard battery
powered handsets such as CDMA, WCDMA, GSM,
GPRS, EDGE, UMTS and Japanese Standards.
The device incorporates low dropout regulators, DC/DC
converters, a complete charger and an audio power
amplifier on one die. It is assembled into a 48-pin Micro
Lead Frame Package (MLF-QFN) with enhanced thermal
characteristics and small form factor.
The linear analog regulators feature extremely high
analog performance regarding noise (30
Vrms typ. from
100Hz to 100kHz), line/load regulation (<1mV static and
<20mV transient) and power supply rejection
(>70dB@1kHz).
The integrated step-down DC/DC converter does not
require an external schottky diode and provides a 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 the
overall efficiency.
To supply white LEDs an additional step-up DC/DC
converter is included together with programmable current
sources to control the brightness.
A low distortion audio power amplifier (1 Watt differential)
allows hands-free operation and high quality ringing
tones.
The device also features a chemistry independent charger
including automatic trickle charge, gas gauge and
programmable constant voltage and current charging.
The AS3601 is controlled via a serial interface and
integrates all necessary system specific functions such as
Reset, Watch Dog and On Detection.
Output voltages and start-up timings can be programmed
either on metal-mask level, by register or by an external
resistor.
Key Features
10 Programmable High Performance Regulators
-
2 Digital Low Power LDOs (0.75-2.5V, 200mA)
-
4 RF Low Noise LDOs (2.0-3.0V, 150mA)
-
1 SIM Low Power LDO (1.8-3.0V, 20mA)
-
1 BB Low Noise LDO (2.0-3.0V, 150mA)
-
1 Periphery Low Noise LDO (2.5-2.8V, 150mA)
-
1 Low Power LDO (2.5V, 20mA)
Programmable Highly Efficient DC/DC Converters
-
Step-down: 1.0-3.0V, 250mA
-
Step-up: 15V, 40mA e.g. for white LEDs
Stereo Audio Power Amplifier
-
Max. 0.5W@4Ohm
-
Digital Volume Control, 3dB steps
-
Click- and Pop-less start-up and power-down
Complete Chemistry Independent Charger
-
Integrated Gas Gauge
-
Automatic Trickle Charge
-
Prog. Constant Current Charging (0.1-1A)
-
Prog. Constant Voltage Pulse Charging
-
Safety Functions (Low Battery Shutdown)
-
Over and Under Temperature Charge Disable
4 Programmable Current Sources
-
Buzzer (64-127mA)
-
Vibrator (64-127mA)
-
LED1 (1-64mA)
-
LED2 (1-64mA)
-
Wide Battery Supply Range 3.0V 5.5V
-
Serial Control Control Interface
-
On Detect with Hardware Regulator Program
-
2 General Purpose Switches (2Ohm)
-
4 Programmable General Purpose I/Os
-
On-Chip Bandgap Tuning for High Accuracy
(+/-1%)
-
Integrated Programmable Watchdog
(1-1000ms)
-
Programmable Reset (10-500ms)
-
Shutdown Current <1uA
-
Overcurrent and Thermal Protection
-
0.35u CMOS Solution
-
48 Pin Micro Lead Frame Package (MLF-QFN)
-
2.2 Watt Power Disipation @ TAmbient =70C
Application
-
Multi-Standard Power Management for
Cellular Phones
PDAs
-
1 Cell Li+ or 3 Cell NiMH powered devices
Multi-Standard Power Management Unit
for Cellular Phones / PDAs and other Battery Powered Mobile Devices
AS3601 Data Sheet
(preliminary confidential)
austria
micro
systems
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