LP5551

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SNVS417B – DECEMBER 2006 – REVISED APRIL 2013

LP5551 PowerWise™ Technology Compliant Energy Management Unit

Check for Samples: LP5551

1

FEATURES

DESCRIPTION

The

LP5551

is

a

PWI

1.0

compliant

Energy

23

•

2 300 mA Buck Regulators Operate 180

Management

System

for

reducing

power

Degrees out of Phase for Reduced EMI

consumption of stand-alone mobile phone processors

•

1 MHz PWM Switching Frequency

such as base-band or applications processors.

•

4 Programmable LDOs Ideal for I/O (Two of

The

LP5551

contains

two

advanced,

digitally

These), PLL, and Memory Retention Supply

controlled switching regulators for supplying variable

Generation

voltage

to

processor

core

and

memory.

Two

•

Supports High-Efficiency PowerWise

regulators provide P- and N- well biasing for

Technology Adaptive Voltage Scaling

threshold

scaling

applications.

The

device

also

integrates

4

programmable

LDO-regulators

for

•

PWI Open Standard Interface for System

powering

I/O,

PLLs

and

maintaining

memory

Power Management

retention in shutdown-mode.

•

Digitally Controlled Intelligent Voltage Scaling

The device is controlled via the PWI open-standard

•

Auto or PWI Controlled PFM Mode Transition

interface. The LP5551 operates cooperatively with

•

Internal Soft Start/Startup Sequencing

PowerWise™ technology compatible processors to

optimize supply voltages adaptively over process and

•

Adjustable P- and N- Well Bias Supply for

temperature

variations

or

dynamically

using

Threshold Scaling

frequency/voltage pre-characterized look-up tables

•

Power OK Output

and provides P- and N-well biasing for threshold

scaling.

APPLICATIONS

•

Dual Core Processors

•

GSM/GPRS/EDGE & UMTS Cellular Handsets

•

Hand-Held Radios

•

PDAs

•

Battery Powered Devices

•

Portable Instruments

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerWise is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.