TPS40400 PMBus Synchronous Buck Controller

By Texas Instruments 48

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.

  • 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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