AS3604 Datasheet, PDF (1/4 Pages) ams AG – Momentary Power Loss Detection, synchronous DCDC and increased driving capability of the LDOs

AS3604
Preliminary Product Brief and AS3603/04 Delta Sheet, Confidential
austriamicrosystems
Preliminary Product Brief and AS3603/04 Delta Sheet, Confidential
AS3604
AS3603 with Momentary Power Loss Detection, synchronous DCDC
and increased driving capability of the LDOs
General Description
The AS3604 is based on the architecture of the
AS3603. It has additional functions like momentary
power loss detection, a synchronous DCDC buck
converter, charger resume operation and increased
driving capability of the LDOs.
Key Features
The AS3604 features all the functions of the
AS3603 with the following additions (marked with
boldface italcs):
Momentary Power Loss Detection
− Detect a short interruption (<200ms) of
the battery supply (e.g. due to a dropped
phone)
Ten Programmable High Performance LDOs
− Two Digital Low-Power LDOs (0.75 to 2.5V,
200mA; 250mA up to 1.4V)
− Three RF Low-Noise LDOs (1.85 to 3.4V,
200mA)
− Two RF Low-Noise LDOs (1.85 to 3.4V,
150mA)
− One SIM Low-Power LDO (3.0V, 20mA)
− One Periphery Low-Noise LDO (2.5 to
3.2V, 200mA)
− One Low-Power LDO (2.5V, 10mA)
Programmable High Efficiency DC/DC
Converters
− Step-down: 0.8V-3.4V, up to 500mA with
2.2MHz operating frequency and small
external coil (2.2uH))
− 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
− Can regulate the current through the
battery or from the charger
− Charger Input Overvoltage protection
(6V)
− Shutdown even with connected charger
− Charger Resume operation
− Charger Interrupts (Inserted, Removed,
Overvoltage, Resume)
Four 8-Bit Programmable Current Sources
(0.625mA to 160mA) support:
− Buzzer
− Vibrator
− LEDs
Wide Battery Supply Range 3.0 to 5.5V
Four General Purpose Switches (1Ω and 2Ω)
Three Programmable General Purpose I/O Pins
On-Chip Bandgap Tuning for High Accuracy
(±1%)
Integrated Programmable Watchdog (7.5 to
1900ms)
Programmable Reset (10 to 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)
2.1 Watt Power Dissipation @ TAMBIENT = 70ºC
Almost Pin Compatible to AS3603 (only one
pin changed)
Application
Multi-standard power management for mobile
phones, PDAs, and 1-cell Li+ or 3 to 4-cell Ni-MH
powered devices.
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Revision 1.0 / 20060505
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