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FEATURES

DESCRIPTION

APPLICATIONS

TPS65021

SLVS613 – OCTOBER 2005

POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS

•

1.2 A, 97% Efficient Step-Down Converter for

The TPS65021 is an integrated Power Management

System Voltage (VDCDC1)

IC

for

applications

powered

by

one

Li-Ion

or

Li-Polymer cell, and which require multiple power

•

1 A, Up to 95% Efficient Step-Down Converter

rails. The TPS65021 provides three highly efficient,

for Memory Voltage (VDCDC2)

step-down converters targeted at providing the core

•

800 mA, 90% Efficient Step-Down Converter

voltage, peripheral, I/O and memory rails in a

for Processor Core (VDCDC3)

processor

based

system.

All

three

step-down

•

30 mA LDO/Switch for Real Time Clock

converters enter a low-power mode at light load for

maximum efficiency across the widest possible range

(VRTC)

of load currents. The TPS65021 also integrates two

•

2

× 200 mA General-Purpose LDO

general-purpose 200 mA LDO voltage regulators,

•

Dynamic Voltage Management for Processor

which are enabled with an external input pin. Each

Core

LDO operates with an input voltage range between

1.5 V and 6.5 V, allowing them to be supplied from

•

Preselectable LDO Voltage Using Two Digital

one of the step-down converters or directly from the

Input Pins

battery. The default output voltage of the LDOs can

•

Externally Adjustable Reset Delay Time

be digitally set to 4 different voltage combinations

•

Battery Backup Functionality

using the DEFLDO1 and DEFLDO2 pins. The serial

interface can be used for dynamic voltage scaling,

•

Separate Enable Pins for Inductive Converters

masking interrupts, or for dis/enabling and setting the

•

LDO output voltages. The interface is compatible with

•

85-

µA Quiescent Current

transfers at up to 400 kHz. The TPS65021 is

•

Low Ripple PFM Mode

available in a 40-pin (RHA) QFN package, and

•

Thermal Shutdown Protection

operates over a free-air temperature of -40

°C to

•

40-Pin 6 mm x 6 mm QFN Package

85

°C.

•

PDA

•

Cellular/Smart Phone

•

Internet Audio Player

•

Digital Still Camera

•

Digital Radio Player

•

Split Supply DSP and

µP Solutions:

OMAP1610, OMAP1710, OMAP330, XScale

Bulverde, Samsung ARM-Based Processors,

etc.

•

Intel PXA270, etc.

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.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005, 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.