LP3971

LP3971 Power Management Unit for Advanced Application Processors January 2006 LP3971 Power Management Unit for Advanced Application Processors General Description The LP3971 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3971 is optimized for low power handheld applications and provides 6 low dropout, low noise linear regulators, three DC/DC magnetic buck regulators, a back-up battery charger and two GPIO’s. A high speed serial interface is included to program individual regulator output voltages as well as on/off control. www.DataSheet4U.com Features n Compatible with advanced applications processors requiring DVM (Dynamic Voltage Management) n Three buck regulators for powering high current processor functions or I/O’s n 6 LDO’s for powering RTC, peripherals, and I/O’s n Backup battery charger with automatic switch for lithium-manganese coin cell batteries and Super capacitors n I2C compatible high speed serial interface n Software control of regulator functions and settings n Precision internal reference n Thermal overload protection n Current overload protection n Tiny 40-pin 5x5 mm LLP package Key Specifications Buck Regulators n Programmable VOUT from 0.8 to 3.3V n Up to 95% efficiency n Up to 1.6A output current n ± 3% output voltage accuracy LDO’s n Programmable VOUT of 1.0V–3.3V n ± 3% output voltage accuracy n 150/300/370 mA output currents — LDO RTC 30 mA — LDO 1 300 mA — LDO 2 150 mA — LD...