LP3970

LP3970 Power Management Unit for Advanced Application Processors ADVANCE INFORMATION January 2005 LP3970 Power Management Unit for Advanced Application Processors General 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 Compatible 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 mA 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 mA output current n 100 mV (typ) Dropout Applications n n n n PDA phones Smart phones Personal Media Players Digital Cameras Simplified Application Circuit 20137101 © 2005 National Semiconductor Corporation DS201371 www.national.com 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 www.national.com. LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.