TPS65020 Datasheet, PDF (1/44 Pages) Texas Instruments – POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS

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TPS65020
SLVS607 – SEPTEMBER 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)
• 20 mA LDO/Switch for Real Time Clock
(VRTC)
• 2 × 50 mA LDO for SRAM and PLL
• Dynamic Voltage Management for Processor
Core
• 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
• Push Button I/O
APPLICATIONS
• PDA
• Cellular/Smart Phone
• Internet Audio Player
• Digital Still Camera
• Digital Radio Player
• Split Supply DSP and µP Solutions:
OMAP1610, OMAP1710, OMAP330
• Intel PXA270, etc.
DESCRIPTION
The TPS65020 is an integrated Power Management
IC for applications powered by one Li-Ion or
Li-Polymer cell, and which require multiple power
rails. The TPS65020 provides three highly efficient,
step-down converters targeted at providing the core
voltage, peripheral, I/O and memory rails in a pro-
cessor 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 TPS65020 also integrates two 50 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 main battery. The two
50-mA LDO voltage regulators are intended for use
with the SDRAM and PLL power supply in a Intel
PXA270 based system. The serial interface is used
for dynamic voltage scaling of the core voltage,
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 TPS65020 incorporates a push button
debounced input and latched output for implemen-
tation of a push-button turn-on feature, typically
required in smartphones or wireless PDAs.
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