TPS65021 Datasheet, PDF (1/45 Pages) Texas Instruments – POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS

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TPS65021
SLVS613 – OCTOBER 2005
POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS
FEATURES
• 1.2 A, 97% Efficient Step-Down Converter for
System Voltage (VDCDC1)
• 1 A, Up to 95% Efficient Step-Down Converter
for Memory Voltage (VDCDC2)
• 800 mA, 90% Efficient Step-Down Converter
for Processor Core (VDCDC3)
• 30 mA LDO/Switch for Real Time Clock
(VRTC)
• 2 × 200 mA General-Purpose LDO
• Dynamic Voltage Management for Processor
Core
• Preselectable LDO Voltage Using Two Digital
Input Pins
• Externally Adjustable Reset Delay Time
• Battery Backup Functionality
• Separate Enable Pins for Inductive Converters
• I²C™ Compatible Serial Interface
• 85-µA Quiescent Current
• Low Ripple PFM Mode
• Thermal Shutdown Protection
• 40-Pin 6 mm x 6 mm QFN Package
APPLICATIONS
• 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.
DESCRIPTION
The TPS65021 is an integrated Power Management
IC for applications powered by one Li-Ion or
Li-Polymer cell, and which require multiple power
rails. The TPS65021 provides three highly efficient,
step-down converters targeted at providing the core
voltage, peripheral, I/O and memory rails in a
processor based system. All three step-down
converters enter a low-power mode at light load for
maximum efficiency across the widest possible range
of load currents. The TPS65021 also integrates two
general-purpose 200 mA LDO voltage regulators,
which are enabled with an external input pin. Each
LDO operates with an input voltage range between
1.5 V and 6.5 V, allowing them to be supplied from
one of the step-down converters or directly from the
battery. The default output voltage of the LDOs can
be digitally set to 4 different voltage combinations
using the DEFLDO1 and DEFLDO2 pins. The serial
interface can be used for dynamic voltage scaling,
masking interrupts, or for dis/enabling and setting the
LDO output voltages. The interface is compatible with
the Fast/Standard mode I²C specification, allowing
transfers at up to 400 kHz. The TPS65021 is
available in a 40-pin (RHA) QFN package, and
operates over a free-air temperature of -40°C to
85°C.
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.
I²C is a trademark of Philips Electronics.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated