Datasheet > LP5550

LP5550

更新时间： 2024-09-22 21:53:55

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
25页	1051K
描述
PowerWise Technology Compliant Energy Management Unit

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LP5550 数据手册

October 2005

LP5550

™

PowerWise Technology Compliant Energy

Management Unit

General Description

Features

n Supports high-efficiency PowerWise Technology

Adaptive Voltage Scaling

The LP5550 is a PWI 1.0 compliant Energy Management

System for reducing power consumption of stand-alone mo-

bile phone processors such as base-band or applications

processors.

n PWI open standard interface for system power

management

n Digitally controlled intelligent voltage scaling

n 1 MHz PWM switching frequency

n Auto or PWI controlled PFM mode transition

n Internal soft start/startup sequencing.

n 3 programmable LDOs for I/O, PLL, and memory

retention supply generation.

The LP5550 contains an advanced, digitally controlled

switching regulator for supplying variable voltage to proces-

sor core and memory. The device also incorporates 3 pro-

grammable LDO-regulators for powering I/O, PLLs and

maintaining memory retention in shutdown-mode.

The device is controlled via the PWI open-standard inter-

face. The LP5550 operates cooperatively with PowerWise

technology compatible processors to optimize supply volt-

ages adaptively over process and temperature variations or

dynamically using frequency/voltage pre-characterized

look-up tables.

n Power OK output.

Applications

n GSM/GPRS/EDGE & UMTS cellular handsets

n Hand-held radios

n PDAs

n Battery powered devices

n Portable instruments

System Diagram

20154563

FIGURE 1. System Diagram

DS201545

www.national.com

12 3 4 5 6 7...25

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与LP5550相关器件

型号	品牌	获取价格	描述	数据表
LP5550SQ	NSC	获取价格	PowerWise Technology Compliant Energy Management Unit
LP5550SQ/NOPB	TI	获取价格	PowerWise Technology Compliant Energy Power Management IC (PMIC) 16-WQFN -40 to 125
LP5550SQX	NSC	获取价格	PowerWise Technology Compliant Energy Management Unit
LP5550SQX/NOPB	TI	获取价格	PowerWise Technology Compliant Energy Power Management IC (PMIC) 16-WQFN -40 to 125
LP5551	NSC	获取价格	PowerWise⑩ Technology Compliant Energy Manage
LP5551SQ	NSC	获取价格	PowerWise⑩ Technology Compliant Energy Manage
LP5551SQX	NSC	获取价格	PowerWise⑩ Technology Compliant Energy Manage
LP5552	NSC	获取价格	PWI 2.0 and PowerWise⑩ Technology Compliant E
LP5552_08	NSC	获取价格	PWI 2.0 and PowerWise Technology Compliant Energy Management Unit
LP5552TL/NOPB	NSC	获取价格	PWI 2.0 and PowerWise Technology Compliant Energy Management Unit