LP3970

OBSOLETE LP3970 www.ti.com SNVS348F – JANUARY 2005 – REVISED AUGUST 2007 Power Management Unit for Advanced Application Processor Check for Samples: LP3970 FEATURES 1 2 Compatible with Advanced Applications Processors Requiring Dynamic Voltage Management (DVM) Two Buck Regulator for Powering High Current Processor Functions or Peripheral Devices Eleven LDO's for Powering Internal Processor Functions and I/O's Backup Battery Charger with Automatic Switching for Lithium and Lithium-Manganese Coin Cell Batteries I2C Compatible High Speed Serial Interface Software Control of Regulator Functions and Settings Thermal Overload Protection Current Overload Protection Tiny 48-Pin WQFN Package APPLICATIONS PDA Phones Smart Phones Personal Media Players Digital Cameras KEY SPECIFICATIONS Buck Regulators – Programmable VOUT from 0.8 to 3.3V – Up to 95% efficiency – 650 mA output current – ±3% output voltage accuracy LDO’s – Programmable VOUT of 1.5-3.3V – ±3% output voltage accuracy – 50 mA to 300 mA output current – 100 mV dropout DESCRIPTION The LP3970 is a multi-function, programmable Power Management Unit, designed especially for advanced application processors. The LP3970 is optimized for low power handheld PMU applications and 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 we...