Power Management Unit for Mobile Phones PRODUCT BRIEF 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. 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 • 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 0.35µm CMOS Solution QFN48 package Applications • Power Management Unit for GSM Mobile Phones • 1 Cell Li+ or 3…4 Cell NiMH powered devices 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 © 2004 austriamicrosystems AG. All rights reserved. March 20045 Page 1 of 2 AS3653 Product Brief 1 Block Diagram © 2004 austriamicrosystems AG. All rights reserved. March 20045 Page 2 of 2