ADP3510

a FEATURES Handles All CDMA Baseband Power Management Six LDOs Optimized for Specific CDMA Subsystems Li-Ion and NiMH Battery Charge Function Ambient Temperature: ؊20 ؇C to +85 ؇ C TSSOP 28-Lead Package Optimized for LSI Logic Baseband Chipset APPLICATIONS CDMA Handsets CDMA Power Management System ADP3510 FUNCTIONAL BLOCK DIAGRAM VBAT VBAT2 RTC VIO LDO DIGITAL CORE LDO POWER-UP SEQUENCING AND PROTECTION LOGIC ANALOG LDO TCXO LDO MEMORY LDO REF BUFFER VTRC PWRONKEY VIO ROWX PWRONIN ALARM PDCAP VCORE VAN VTCXO VMEM TCXOEN GENERAL DESCRIPTION RESCAP REFOUT RESET The ADP3510 is a multifunction power system chip optimized for CDMA handset power management. It contains six specialized LDOs, one to power each of the critical CDMA subblocks. Sophisticated controls are available for power-up during battery charging, keypad interface, and RTC alarm. If a Li-Ion battery is being charged, the charge circuit maintains low current charging during the initial charge phase and provides an end of charge (EOC) signal when the cell has been fully charged. The ADP3510 is specified over the temperature range of –20∞C to +85∞C and is available in a narrow body TSSOP 28-Lead package. CHRDET EOC CHGEN GATEIN BATSNS ISENSE GATEDR CHRIN BATTERY CHARGE CONTROLLER BATTERY VOLTAGE DIVIDER MVBAT DGND ADP3510 AGND 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 inf...