LP5550 datasheet(1/25 Pages) NSC

部件名	LP5550

功能描述	PowerWise Technology Compliant Energy Management Unit

PDF	25 Pages

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制造商	NSC [National Semiconductor (TI)]

网页	http://www.national.com

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LP5550

PowerWise™ Technology Compliant Energy

Management Unit

General Description

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.

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.

Features

n

Supports high-efficiency PowerWise Technology

Adaptive Voltage Scaling

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.

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

October 2005

DS201545

www.national.com

类似零件编号 - LP5550

制造商	部件名	数据表	功能描述
Texas Instruments	LP5550	475Kb / 28P	LP5550 PowerWise??Technology Compliant Energy Management Unit
	LP5550SQ/NOPB	475Kb / 28P	LP5550 PowerWise??Technology Compliant Energy Management Unit
	LP5550SQX/NOPB	475Kb / 28P	LP5550 PowerWise??Technology Compliant Energy Management Unit

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类似说明 - LP5550

制造商	部件名	数据表	功能描述
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