AT73C202 Summary - Mature

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