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| AT73C202 |
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 ATMEL
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1 2740BS–PMGMT–12/03 Features • 300mA/1.8V/2.5V Switching Regulator for Baseband Supply • 2.8V/80mA LDO for Baseband Pad Supply • Two 130mA/2.8V Low-noise, High PSRR RF LDO Voltage Regulators • 130mA/2.7V/2.8V Baseband Low-noise, High PSRR Analog LDO Regulator • Ultra Low-power RTC LDO Voltage Regulator • Backup Battery Charger • Li-Ion or Li-polymer Battery Charger Controller • Buzzer and Vibrator Drivers • Charging LED Driver • Power Management Start-up Controller and Reset Generation • SIM Level Shifters and SIM 10mA/1.8V/2.8V LDO Voltage Regulator • Ultra-low Sleep Mode Current Consumption (17 µA typ) • Over and Under Voltage Protections • Over Temperature Protection • Low-power Mode and Sleep Mode • Straight and Easy Interfacing to any Baseband Controller • Small 5x5mm, Forty-nine Ball FBGA Package Description The AT73C202 is a low-cost, ultra low-power, power and battery management IC designed to interface directly with state-of-the-art cellular phones, for example with 2.5G GSM phones. It includes all required power supplies tailored to be fully compati- ble with the sub-systems of recent mobile phone chipsets, including the RF, analog and digital (DSP, microcontroller, memories) sections. The AT73C202 integrates a step-down DC-DC converter that supplies 300 mA with internal switches and two levels of voltage programming for the baseband core (1.8V and 2.5V). A low-power mode is available in order to minimize standby current con- sumption during the “quiet” transmission periods. In addition, the AT73C202 includes a lowcost battery charger, using a simple external PNP transistor for Li-Ion or Li-Polymer batteries. Battery operating conditions are maintained within safe limits under hardware control during the start-up procedure (when the phone is turned on or a charger is plugged in). The battery pre-charge is also integrated and self-operated by the AT73C202. On completion the fast charge and end-of-charge procedure is transferred to the baseband software. The AT73C202 integrates 7 low-dropout linear regulators specifically designed to sup- ply RF (x2), analog, memories, etc. It also includes a back-up battery charger and an ultra low-power regulator dedicated to the baseband real-time clock (RTC) supply dur- ing sleep mode. The hardwired start-up mechanism (power management controller state machine) ensures safe telephone operation during the wake-up and shut-down procedures, and during the multiple real-life operating conditions of a mobile phone (such charger plug- in, plug-out, battery plug-in, plug-out, low or dead battery, etc.). The AT73C202 is packaged into a 49 ball (7x7 matrix), 0.65mm pitch, 5mm x 5mm outline FBGA package. Power Management for Mobiles (PM) AT73C202 Summary Note: This is a summary document. A complete document is available on our Web site at www.atmel.com. |
