GENERAL DESCRIPTION

The ADP3408 is a multifunction power system chip optimized for GSM handsets, especially those based on the Analog Devices AD20msp430 system solution. 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 signal when a Li-ion battery is being charged.

FEATURES

Handles All GSM Baseband Power Management

6 LDOs Optimized for Specific GSM Subsystems

Li-Ion and NiMH Battery Charge Function

Optimized for the AD20msp430 Baseband Chipset

APPLICATIONS

GSM/DCS/PCS/CDMA Handsets