一个ADI GSM 方案的PUM

ADP3522 - GSM Power Management SystemGSM Power Management System ADP3522
FEATURES 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 APPLICATIONS GSM/GPRS Handsets
PWRONKEY ROWX

FUNCTIONAL BLOCK DIAGRAM
VBAT VBAT2 VRTCIN

POWER-UP SEQUENCING AND PROTECTION LOGIC

SIM LDO

VSIM SIMVSEL

DIGITAL CORE LDO

VCORE

GENERAL DESCRIPTION

PWRONIN ANALOG LDO TCXOEN SIMEN RESCAP MEMORY LDO RTC LDO REF BUFFER VMEM TCXO LDO VAN

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