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High Voltage (40V, 1.25A) Step Down Switching Regulator Evaluation Module



  • Integrated 40 V, N-Channel Buck Switch
  • Integrated Start-up Regulator
  • Input Voltage Range: 8 V to 36 V
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Start-up
  • Adjustable Output Voltage
  • Valley Current Limit At 1.25 A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown


  • High Efficiency Point-Of-Load (POL) Regulator
  • Non-Isolated Telecommunication Buck Regulator
  • Secondary High Voltage Post Regulator


Texas Instruments  LM34910EVAL

The LM34910EVAL evaluation board provides the designengineer with a fully functional buck regulator, employing theconstant on-time (COT) operating principle. This evaluationboard provides a 5V output from an input range of 8V - 36V.The circuit provides load currents >1A, with the current limitset at 1.3A