AS3603 AMSCO | Alldatasheet
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Technical content
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 30µVRMS from 100Hz to 100kHz ! 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 @ 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. 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 @ 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 ! 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 @ TAMBIENT = 70ºC
3 Application
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.
4 Block Diagram
Figure 1. AS3603 Block Diagram. Option: Audio Amplifier In Differential Mode, Step Down DC/DC Converter as