ADP3502 Datasheet | Analog Devices

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 m A 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 32k Hz OUTPUT CONTROL RTC COUNTER GENERAL DESCRIPTION RESET OUTPUT 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 ponents, 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 patible with MSM51xx-based designs. The ADP3502 es 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. No license is...