LP3971数据手册集成电路（IC）的电源管理-专用规格书PDF

描述 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.

特性 Features

·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
Key Specifications ·Buck Regulators·Programmable VOUT 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
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