TPS650231_10 Datasheet, PDF (1/55 Pages) Texas Instruments – POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS

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TPS650231
SLVSAE3 – AUGUST 2010
POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS
Check for Samples: TPS650231
FEATURES
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•23 1.7 A, 90% Efficient Step-Down Converter for
Processor Core (VDCDC1)
• 1.2 A, Up to 95% Efficient Step-Down
Converter for System Voltage (VDCDC2)
• 0.8 A, 92% Efficient Step-Down Converter for
Memory Voltage (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-mA Quiescent Current
• Low Ripple PFM Mode
• Thermal Shutdown Protection
• 40 Pin, 5 mm × 5 mm QFN /RSB) Package or
• 49 Ball 3 mm x 3 mm WCSP (YFF) package
APPLICATIONS
• Smart phones
• Netbooks / MIDs
• Portable Media Players
DESCRIPTION
The TPS650231 is an integrated Power Management
IC for applications powered by one Li-Ion or
Li-Polymer cell, and which require multiple power
rails. The TPS650231 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 TPS650231 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 TPS650231 is
available in a 40-pin (RSB) QFN package or in a 49
ball 3mm x 3mm WCSP (YFF) package, and
operates over a free-air temperature of –40°C to
85°C.
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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.
PowerPAD is a trademark of Texas Instruments.
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I²C is a trademark of NXP Semiconductors.
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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 © 2010, Texas Instruments Incorporated