Datasheet > LP3972_08

LP3972_08

更新时间： 2024-11-15 04:44:03

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
60页	1108K
描述
Power Management Unit for Advanced Application Processors

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LP3972_08 数据手册

January 11, 2008

LP3972

Power Management Unit for Advanced Application

Processors

General Description

The LP3972 is a multi-function, programmable Power Man-

100 mV (typ) dropout

■

Features

agement Unit, designed especially for advanced application

Compatible with advanced applications processors

■

processors. The LP3972 is optimized for low power handheld

applications and provides 6 low dropout, low noise linear reg-

ulators, 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.

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

Key Specifications

I²C compatible high speed serial interface

Software control of regulator functions and settings

Precision internal reference

■

Buck Regulators

Programmable V_OUTfrom 0.725 to 3.3V

■

Thermal overload protection

Up to 95% efficiency

Current overload protection

Up to 1.6A output current

Tiny 40-pin 5x5 mm LLP package

±3% output voltage accuracy

LDO’s

Applications

Programmable V_OUTof 1.0V–3.3V

■

PDA phones

■

±3% output voltage accuracy

Smart phones

150/300/400 mA output currents

Personal Media Players

LDO RTC 30 mA

LDO 1 300 mA

LDO 2 150 mA

LDO 3 150 mA

LDO 4 150 mA

LDO 5 400 mA

—

Digital cameras

Application processors

■

Marvell PXA

Freescale

Samsung

—

202076

www.national.com

12 3 4 5 6 7...60

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