LP3970 Datasheet | National Semiconductor

Description The LP3970 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3970 has been optimized for low power handheld applications PMU provides 11 low dropout, low noise linear regulators, two DC/DC magnetic buck regulators, a back-up battery charger and 4 GPO’s. A high speed serial interface is included to program individual regulator output voltages as well on/off control. Features n patible with advanced applications processors n Additional buck regulator for powering high current peripheral devices n 11 LDOs for powering Internal processor functions and I/O’s n Backup battery charger for Lithium and Lithium-Manganese coin cell batteries n Automatic switching to backup battery n High speed serial interface for independent control of device functions and settings n Precision internal reference n Thermal overload protection n Current overload protection n 48-lead 7x7x0.8 mm LLP package n Software Programmable Low Noise LDO’s Key Specifications Buck regulators n Programmable VOUT from 0.8 to 3.5 V n Up to 95% Efficiency n 600 m A output current n +3% output voltage accuracy LDO’s n Programmable VOUT of 1.5-3.3 V n +3% output voltage accuracy n 100/150/300 m A output current n 100 m V (typ) Dropout Applications n n n n PDA phones Smart phones Personal Media Players Digital Cameras Simplified Application Circuit © 2005 National Semiconductor Corporation DS201371 .national. LP3970 Power Management Unit for Advanced Application Processors Notes National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at .national.. LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL PONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN...