SCLK

SPWI

FB

SW

VO1

VO2

VBAT

ENABLE

PWROK

RESETN

PLL

Embedded Memory

Advanced Power

Controller (APC)

LP5550

VO3

PWI

AVS

Hardware Performance

Monitor (HPM)

Processor Core

AVS/DVS domain

I/O Bus

Slave Power

Controller

(SPC)

LDO1

LDO2

LDO3

SW

SoC

LP5550

www.ti.com

SNVS378G – OCTOBER 2005 – REVISED APRIL 2013

LP5550 PowerWise™ Technology Compliant Energy Management Unit

Check for Samples: LP5550

1

FEATURES

DESCRIPTION

The

LP5550

is

a

PWI

1.0

compliant

Energy

2

•

Supports High-Efficiency PowerWise

Management

System

for

reducing

power

Technology Adaptive Voltage Scaling

consumption of stand-alone mobile phone processors

•

PWI Open Standard Interface for System

such as base-band or applications processors.

Power Management

The

LP5550

contains

an

advanced,

digitally

•

Digitally Controlled Intelligent Voltage Scaling

controlled switching regulator for supplying variable

•

1 MHz PWM Switching Frequency

voltage to processor core and memory. The device

also incorporates 3 programmable LDO-regulators for

•

Auto or PWI Controlled PFM Mode Transition

powering

I/O,

PLLs

and

maintaining

memory

•

Internal Soft Start/Startup Sequencing

retention in shutdown-mode.

•

3 Programmable LDOs for I/O, PLL, and

The device is controlled via the PWI open-standard

Memory Retention Supply Generation

interface. The LP5550 operates cooperatively with

•

Power OK Output

PowerWise technology compatible processors to

optimize supply voltages adaptively over process and

APPLICATIONS

temperature

variations

or

dynamically

using

frequency/voltage pre-characterized look-up tables.

•

GSM/GPRS/EDGE & UMTS Cellular Handsets

•

Hand-Held Radios

•

PDAs

•

Battery Powered Devices

•

Portable Instruments

System Diagram

Figure 1. System Diagram

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

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2013, 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.