GSM Power Management System
Handles all GSM Baseband Power Management
6 LDOs Optimized for Specific GSM Subsystems
Li-Ion Battery Charge Function
Optimized for the AD20msp430 Baseband Chipset
Reduced Package Size: 5 mm ؋ 5 mm LFCSP-32
The ADP3522 is a multifunction power system chip optimized
for GSM/GPRS handsets, especially those based on the Analog
Devices AD20msp430 system solution with 1.8 V digital
baseband processors, such as the AD6525, AD6526, and
AD6528. It contains six LDOs, one to power each of the critical
GSM subblocks. Sophisticated controls are available for power-
up during battery charging, keypad interface, and RTC alarm.
The charge circuit maintains low current charging during the
initial charge phase and provides an end of charge (EOC) signal
when a Li-Ion battery is being charged. This product also meets
the market trend of reduced size with a new LFCSP package.
Its footprint is only 5 mm ϫ 5 mm and yet offers excellent ther-
mal performance due to the exposed die attached paddle.
The ADP3522 is specified over the temperature range of
–20°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
VBAT VBAT2 VRTCIN
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