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| Power Management Unit for Mobile Phones AS3653 General Description The AS3653 device is a highly integrated solution for power supply generation and monitoring, battery management including charging and SIM card communication. It is controlled via a serial control interface and integrates all necessary system specific functions such as clock, reset and interrupt generation, voltage and temperature monitoring, accessory detection and On/Off control. PRODUCT BRIEF * 2 General Purpose Pulse Width Modulator (PWM) Outputs with programmable frequency and duty cycle * 2 General Purpose LED Pattern Generator Outputs with programmable pattern and repetition period * 8 General Purpose Input / Output Pins * * * * * * Wide Battery Supply Range 3.0...5.5V Serial Control Interface On-Chip Bandgap Tuning for High Accuracy (1%) Excess Current and Thermal Protection 0.35m CMOS Solution QFN48 package Key Features Supply Voltage Generation * 1 Analogue High Current LDO (1.85...3.4V, 250mA) * 1 Analogue Low Noise LDO (1.85...3.4V, 150mA) * 1 Analogue Low Noise LDO (1.85...3.4V, 100mA) * 2 RF Low Noise LDOs (1.85...3.4V, 100mA) * 1 Analogue Low Noise LDO (1.85...3.4V, 10mA) * 3 Digital Low Power LDOs (150mA) * 1 SIM Card Supply LDO (1.8 / 3.0V, 20mA) * 1 Low Noise, High PSRR Microphone Bias Generator Complete Chemistry Independent Charger * Autonomous Trickle Charge Mode with 60min Timeout * Programmable Constant Current Charging * Programmable Constant Voltage / Pulse Charging * Integrated Gas Gauge * Overvoltage protection: Battery and Charger Voltage * Operation without battery * Battery presence indication * Programmable backup battery charger SIM Card Interface * Transparent SIM Card Interface with signal level translators and enhanced ESD protection System Control * Clock Generation including low power 32kHz crystal oscillator * RTC with Alarm Function * Programmable Reset Generation for System Controller * Programmable Interrupt Controller * Programmable Battery Voltage Monitor * Temperature Sensor to prevent failure of the device due to excess power dissipation * 2 programmable Accessory Recognition Input Pins * On/Off Control Module * Programmable Watchdog Module Applications * Power Management Unit for GSM Mobile Phones * 1 Cell Li+ or 3...4 Cell NiMH powered devices (c) 2004 austriamicrosystems AG. All rights reserved. March 20045 Page 1 of 2 AS3653 Product Brief 1 Block Diagram (c) 2004 austriamicrosystems AG. All rights reserved. March 20045 Page 2 of 2 |
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