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ADP3502

Analog Devices
Part Number ADP3502
Manufacturer Analog Devices
Description CDMA Power Management System
Published May 21, 2005
Detailed Description a FEATURES 11 LDOs Optimized for Specific CDMA Subsystems 4 Backup LDOs for Standby Mode Operation Ultra Low Standby Sup...
Datasheet PDF File ADP3502 PDF File

ADP3502
ADP3502

Overview
a 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 CDMA Power Management System ADP3502 FUNCTIONAL BLOCK DIAGRAM LOGIC BLOCK POWER ON DELAY 10ms ANALOG BLOCK BATTERY CHARGER KEYPAD I/F INTERRUPT CONTROL LDO CONTROL REFERENCE GPIO LDO1 TO LDO11 SERIAL I/F RESET VOLTAGE DETECTOR 32kHz OUTPUT CONTROL RTC COUNTER GENERAL DESCRIPTION RESET OUTPUT ADP3502 STAY-ALIVE TIMER 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 significantly 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.
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.
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