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Analog Devices - CDMA Power Management System

Numéro de référence ADP3502
Description CDMA Power Management System
Fabricant Analog Devices 
Logo Analog Devices 





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ADP3502 fiche technique
a
CDMA Power Management System
ADP3502
FEATURES
11 LDOs Optimized for Specific CDMA Subsystems
4 Backup LDOs for Standby Mode Operation
Ultra Low Standby Supply Current
High Accuracy Battery Charger (0.7%)
3 Li-Ion Battery Charge Modes
5 mA Precharge
Low Current Charge
Full Current Charge
Integrated RTC
Ambient Temperature: –30؇C to +85؇C
64-Lead 7 mm ؋ 7 mm ؋ 1 mm TQFP Package
APPLICATIONS
CDMA/CDMA2000/PCS Handsets
GENERAL DESCRIPTION
The ADP3502 is a multifunction chip optimized for CDMA-1x
cell phone power management. It offers a total power solution
for the handset baseband and RF section, including LDOs to
power 11 subsystems. Also integrated are a real-time clock
(RTC), serial bus interface, and charging control for Li-Ion/
Li-Polymer batteries. Sophisticated controls are available for
power-up during battery charging, keypad interface, GPIO/INT
function, and RTC function.
The ADP3502 is optimized for CDMA handsets powered by
single-cell Li-Ion batteries. Its high level of integration sig-
nificantly reduces the design effort, number of discrete
components, and solution size/cost. The main-sub LDO
structure reduces the standby current consumption, and as a
result, greatly extends the standby time of the phone. System
operation has been proven to be fully compatible with
MSM51xx-based designs.
The ADP3502 comes in a 64-lead 7 mm × 7 mm × 1 mm
TQFP package and is specified over a wide temperature range of
–30°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
LOGIC
BLOCK
POWER ON
DELAY 10ms
KEYPAD I/F
GPIO
INTERRUPT
CONTROL
LDO
CONTROL
SERIAL I/F
RESET
32kHz OUTPUT
CONTROL
RESET
OUTPUT
RTC
COUNTER
STAY-ALIVE
TIMER
ANALOG
BLOCK
BATTERY
CHARGER
REFERENCE
LDO1 TO LDO11
VOLTAGE
DETECTOR
ADP3502
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.

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