TPS40400 PMBus Synchronous Buck Controller



Texas Instruments' cost-optimized flexible 3.0 V to 20 V PMBus synchronous buck controller

Texas Instruments TPS40400 PMBus Synchronous Buck Controller Texas Instruments' TPS40400 is a cost-optimized flexible synchronous buck controller that operates from a nominal 3 V to 20 V supply. This controller is an analog PWM controller that allows programming and monitoring via the PMBus interface. Flexible features found on this device include programmable soft-start time, programmable short circuit limit and programmable undervoltage lockout (UVLO).

An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Gate drive voltage is 6 V to better enhance the power FETs for reduced losses. Short circuit detection is done by sensing the voltage drop across the inductor or across a resistor placed in series with the inductor.   TPS40400 Datasheet

  Features   Applications
  • Input operating voltage range: 3 V to 20 V
  • PMBus enabled analog controller
  • Reference 600 mV ±1%
  • Remote voltage sense amplifier
  • Internal 6 V regulator and 6 V gate drive
  • Programmable overcurrent protection
  • Inductor resistance or series resistance used for current sensing
  • Programmable switching frequency: 200 kHz to 2 MHz
  • Powergood indicator
  • Thermal shutdown
  • Programmable soft-start
  • Internal bootstrap diode
  • Telecom
  • Storage
  • Base station
  • Server
  • DSP and FPGA POL applications
  • Powering TI’s processors (DM816x, C6A816x) or any processors
    that require AVS

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Texas Instruments
Part Number
Digi-Key
Part Number
Packaging Voltage - Supply Package  
TPS40400RHLT 296-29478-2-ND Tape & Reel (250) 3 V ~ 20 V 24-QFN TPS40400 Datasheet
296-29478-1-ND Cut Tape
296-29478-6-ND Digi-Reel®