TPS65023 Datasheet, PDF (1/43 Pages) Texas Instruments – POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS

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TPS65023
SLVS670A – JUNE 2006 – REVISED JUNE 2006
POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS
FEATURES
• 1.5 A, 97% Efficient Step-Down Converter for
Processor Core (VDCDC1)
• 1.2 A, Up to 95% Efficient Step-Down
Converter for System Voltage (VDCDC2)
• 1.0 A, 90% Efficient Step-Down Converter for
Memory Voltage (VDCDC3)
• 30 mA LDO/Switch for Real Time Clock
(VRTC)
• 2 x 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
• Digital Media Players
• Internet Audio Player
• Digital Still Camera
• Digital Radio Player
• Supply DaVinci™ DSP Family Solutions
DESCRIPTION
The TPS65023 is an integrated Power Management
IC for applications powered by one Li-Ion or
Li-Polymer cell, and which require multiple power
rails. The TPS65023 provides three highly efficient,
step-down converters targeted at providing the core
voltage, peripheral, I/O and memory rails in a
processor based system. The core converter allows
for on-the-fly voltage changes via serial interface,
allowing the system to implement dynamic power
savings. 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 TPS65023 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 TPS65023
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.
DaVinci, PowerPAD are trademarks of Texas Instruments.
I2C is a trademark of Philips Electronics.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2006, Texas Instruments Incorporated