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FEATURES Handles all GSM Baseband Power Management Functions Four LDOs Optimized for Specific GSM Subsystems Charges Back-Up Capacitor for Real-Time Clock Charge Pump and Logic Level Translators for 3 V and 5 V GSM SIM Modules Narrow Body 4.
4 mm 28-Lead TSSOP Package APPLICATIONS GSM/DCS/PCS Handsets TeleMatic Systems ICO/Iridium Terminals
GSM Power Management System ADP3404
FUNCTIONAL BLOCK DIAGRAM
VBAT
ADP3404
DIGITAL LDO VCC
RESET PWRONKEY ROWX POWER-UP SEQUENCING AND PROTECTION LOGIC
RTC LDO
VRTC
PWRONIN ANALOGON RESCAP
XTAL OSC LDO
VTCXO
GENERAL DESCRIPTION
The ADP3404 is a multifunction power management system IC optimized for GSM cell phones.
The wide input
voltage range of...