Power Management Unit For Advanced Application Processors Evaluation Board

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. 

Compatible with Advanced Applications Processors Requiring DVM (Dynamic Voltage Management)

Three Buck Regulators for Powering High Current Processor Functions or I/O"s

6 LDO"s for Powering RTC, Peripherals, and I/O"s

Backup Battery Charger with Automatic Switch for Lithium-Manganese Coin Cell Batteries and Super Capacitors

I²C Compatible High Speed Serial Interface

Software Control of Regulator Functions and Settings

Precision Internal Reference

Thermal Overload Protection

Current Overload Protection

Tiny 40-pin 5x5 mm WQFN Package

Buck Regulators

• Programmable V_OUT from 0.725 to 3.3V
• Up to 95% Efficiency
• Up to 1.6A Output Current
• ±3% Output Voltage Accuracy

LDO’s

• Programmable VOUT of 1.0V–3.3V
• ±3% output voltage accuracy
• 150/300/370 mA output currentsLDO RTC 30 mALDO 1 300mALDO 2 150 mALDO 3 150 mALDO 4 150mALDO 5 370 mA
• 100 mV (typ) dropout