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TPS40197RGYR-TPS40197RGYT
4.5V To 14V Input Synchronous Buck Controller With 4-Bit Vid Interface And Power Good
VID3
BOOT
VID0
REF
TPS40197 11LDRVCOMP 16 10BPVDD
VID1 VID2 9
PGOOD GND
VID3
VID2
VID1
VID0
VIN
UDG-08100
TPS40197
www.ti.com SLUS886A –NOVEMBER 2008–REVISED JULY 2012
SYNCHRONOUS BUCK CONTROLLER WITH 4-BIT VID INTERFACE
FOR SMART-REFLEX™ DSPs
1FEATURES CONTENTS Input Voltage Range: 4.5Vto14V Device Ratings 2
• 4-Bit Dynamic VID-On-The-Fly Support Electrical Characteristics 4
VID Programmable Output Voltage with Typical Characteristics 6
Programmable Transition Rate Device Information 10
Fixed Switching Frequencyof 520 kHz Application Information 12
Selectable Low-Side (Three Settings) and Design Example 18
Fixed High-Side Thermally Compensated Additional References 20
Overcurrent Protection Power Good Indicator DESCRIPTION Internal 5-V Regulator The TPS40197isa synchronous buck controller that
operates from 4.5Vto 14V input supply nominally.
• Voltage Mode ControlThe controller implements voltage-mode control
• Internally Fixed 5.5-ms Soft-Start Time architecture with the switching frequency fixed at
• Pre-Bias Output Safe 520 kHz. The higher switching frequency facilitates
Thermal Shutdownat 140°C the useof smaller inductor and output capacitors,
thereby providinga compact power-supply solution.
• 16-Pin QFN Package An adaptive anti-cross conduction schemeis usedto
prevent shoot through currentin the power FETs.
APPLICATIONSThe TPS40197 integrates the PWM control and 4-bit
• Smart-Reflex™ DSPs VID interfaceina single chipto allow seamless on-
• POL Modules the-fly VID changes with programmable transition
Telecom rate.It providesa simple power solution for Smart-
Reflex™ DSP cores.
TYPICAL APPLICATION CIRCUIT
