ADP3408

Features:

Handles all GSM Baseband Power Management
Six LDOs Optimized for Specific GSM Subsystems
Li-Ion and NiMH Battery Charge Function
Optimized for the AD20msp430 Baseband Chipset


Application

GSM /DCS/ PCS/ CDMA  Handsets


Pinout




Specifications

Voltage on any pin with respect to
any GND Pin . . . . . . . . . . . . . . . . . . . . . . . . ...-0.3 V to +10V
Voltage on any pin may not exceed VBAT, with the following
   exceptions: CHRIN, GATEDR, ISENSE
Storage Temperature Range . . . . . . . . . .  ...-65 to +150
Operating Ambient Temperature Range . . . ...-20 to +85
Maximum Junction Temperature . . . . . . . . . . . . . . . . ...125
_JA, Thermal Impedance (TSSOP-28)
   4-Layer PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68/W
   1-Layer PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98/W
Lead Temperature Range (Soldering, 60 sec.) . . . . .. .300

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 sub-blocks. 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.

The ADP3408 is specified over the temperature range of -20 to +85 and is available in narrow body TSSOP-28 pin package.