Microchip — MIC28514/15: 75V Hyper Speed Control Synchronous Buck Regulators

The MIC28514/15 is a family of wide input range (4.5V to 75V) integrated FET, 5A switching regulators. The MIC28514/15 is leveraging the latest enhanced high voltage COT controllers co-packaged with a pair of low FOM power trench N-channel FETS with improved avalanche rating. The output voltage is adjustable down to 0.6V with ±1% accuracy. The MIC28515 offers a “mode” select pin allowing the user to choose in between hyper light load and hyper speed control operations. The MIC28514 offers the option of external “soft start” feature in place of “mode” select pin allowing the user the flexibility to adjust soft start using an external capacitor.


  • 4.5V to 75V input voltage range
  • 5A current capability
  • 0.6V internal reference
  • High voltage internal LDO for single supply operation
  • Supports start-up to pre-bias output
  • 0.6V to 32V (limited by duty cycle) adjustable output
  • Adaptive constant on time control
  • Adjustable 270KHZ to 800KHZ switching frequency
  • Operation with both internal and external VDD
  • Internal compensator for tight output regulation