Datasheet

TPS65021
www.ti.com
SLVS613C OCTOBER 2005 REVISED SEPTEMBER 2011
POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS
Check for Samples: TPS65021
1
FEATURES
DESCRIPTION
234
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
1 A, Up to 95% Efficient Step-Down Converter
Li-Polymer cell, and which require multiple power
for Memory Voltage (VDCDC2)
rails. The TPS65021 provides three highly efficient,
900 mA, 90% Efficient Step-Down Converter
step-down converters targeted at providing the core
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 (VRTC)
converters enter a low-power mode at light load for
2 × 200 mA General-Purpose LDO
maximum efficiency across the widest possible range
Dynamic Voltage Management for Processor
of load currents. The TPS65021 also integrates two
general-purpose 200 mA LDO voltage regulators,
Core
which are enabled with an external input pin. Each
Preselectable LDO Voltage Using Two Digital
LDO operates with an input voltage range between
Input Pins
1.5 V and 6.5 V, allowing them to be supplied from
Externally Adjustable Reset Delay Time
one of the step-down converters or directly from the
battery. The default output voltage of the LDOs can
Battery Backup Functionality
be digitally set to 4 different voltage combinations
Separate Enable Pins for Inductive Converters
using the DEFLDO1 and DEFLDO2 pins. The serial
I
2
C Compatible Serial Interface
interface can be used for dynamic voltage scaling,
masking interrupts, or for dis/enabling and setting the
85-μA Quiescent Current
LDO output voltages. The interface is compatible with
Low Ripple PFM Mode
the Fast/Standard mode I
2
C specification, allowing
Thermal Shutdown Protection
transfers at up to 400 kHz. The TPS65021 is
40-Pin 6 mm x 6 mm QFN Package
available in a 40-pin (RHA) QFN package, and
operates over a free-air temperature of -40°C to
85°C.
APPLICATIONS
PDA
Cellular/Smart Phone
Internet Audio Player
Digital Still Camera
Digital Radio Player
Split Supply TMS320 DSP Family and μP
Solutions:
OMAP1610, OMAP1710, OMAP330, XScale
Bulverde, Samsung ARM-Based Processors,
etc.
Intel
®
PXA270, etc.
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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.
2TMS320, OMAP, PowerPAD are trademarks of Texas Instruments.
3Intel is a registered trademark of Intel Corporation.
4I
2
C is a trademark of Philips Electronics.
PRODUCTION DATA information is current as of publication date.
Copyright © 20052011, 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.

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