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


Application

GSM/GPRS Handsets


Specifications

Voltage on Any Pin with Respect to Any GND Pin . . . .. 0.3 V to +10 V
Voltage on Any Pin May Not Exceed VBAT, with the Following Exceptions: CHRIN, BASE, ISENSE
Storage Temperature Range . . . . . . . . . . . .......... ..... 65^OC to +150^OC
Operating Ambient Temperature Range . . . ............. . 20^OC to +85^OC
Maximum Junction Temperature . . . . . . . . . . . . . . . . .. 125^OC
JA, Thermal Impedance (LFCSP 5 mm * 5 mm)
4-Layer JEDEC PCB . . . . . . . . . . . . . . . . . ... . . . . . . . . 32^OC/W
2-Layer SEMI PCB . . . . . . . . . . . . . . . . . . . . ..... . . . . . 108^OC/W
Lead Temperature Range (Soldering, 60 sec.) . . . . . . . . 300^OC


Description

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.  contains six LDOs, one to power each of the critical GSM subblocks. Sophisticated controls are available for powerup 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
5 mm and yet offers excellent thermal performance due to the exposed die attached paddle.

The ADP3522 is specified over the temperature range of 20°C to +85°C.