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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 A 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
Power Management for Mobiles (PM) AT73C202 Summary
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 compatible 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 consumption 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 supply 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 during 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 plugin, 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.
2740BS-PMGMT-12/03
Note: This is a summary document. A complete document 1 is available on our Web site at www.atmel.com.
Functional Diagram
Figure 1. AT73C202 Functional Diagram
D3 GATE-CHG D2 C3 C1 F5 E5 D4 G6 G5 B5 D5 C6 D6 ECO-MODE EN-ANA-B ON-OFF UP-ON-OFF DC-ON EN EN EN FLASH-LED BAT-VOLT AA-GND BB1 VIN-REG1 Reset Generator DC-DC Converter 1.8V/2.5V 300mA CHG-IN CHG Charger Controller VBAT LED-OUT D1 D-GND RES-B LX V-CORE GND-REG1 V-PAD I/O PAD LDO 2.8V/130mA A-VCC Analog LDO 2.7V/2.8V/130mA A-GND V-BCK BAT-RTC VIN > 2.6V C7 A3 B2 CREF VIN-RF EN-RF1 RF1 LDO 2.8V/130mA V-RF2 EN-RF2 VIN-VIB EN-VIB E6 C5 G1 G3 F4 E4 F3 G2 SIM-1V8/2V8 RESET-IN CLK-IN DATA-IO SIM Level Shifter BUZ-IN BUZ-GND D-VCC SIM-EN SIM LDO 1.8V/2.8V/10mA SIM-RST SIM-CLK SIM-IO F1 F2 E2 SIM-VCC A4 E3 VIBRATOR LDO 2.8V/130mA RF2 LDO 2.8V/130mA GND-RF V-VIB BUZ-OUT VREF EN 2.4V/2.7V/2mA V-RTC VCC-RTC 1.5V/0.5mA V-RF1 B7 E1 C2
F6 F7 G4 G7 B6
B4 A7 A6
A5
VIN-REG2
B1
A1 A2 E7
C4 D7
B3
2
AT73C202
2740BS-PMGMT-12/03
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2740BS-PMGMT-12/03 0M

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