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High Voltage Switching Regulator Controller

Product Announcement from MSK Products

The MSK 5055RH is a radiation hardened wide input voltage range step-down synchronous switching regulator controller. The wide input range, programmable output voltage and switching frequency, make these regulators suitable for a wide variety of medium to high power applications. The adjustable operating frequency provides the flexibility to keep the switching noise out of sensitive frequency bands, and when synchronized, can be ganged out of phase with other controllers for reduced noise and component size. The MSK 5055RH is hermetically sealed in a 16 pin flatpack, and is available with straight or gull wing leads.


  • Manufacturing using Qualified RH3845 Dice
  • Radiation Hardened to 100 Krad(Si) (Method 1019.7 Condition A)
  • High Voltage Operation: Up to 60V Input, and 36V Output
  • Programmable Frequency 100-50KHz, or Synchronizable to 600KHz
  • 10 µA Shutdown Supply Current
  • Antislope Compensation - Current Limit Unaffected by Duty Cycle
  • Reverse Inductor Current Inhibit - Improves Efficiency with Light Loads
  • External Compensation
  • Capable of Driving Standard Power MOSFETs
  • Contact MSK for MIL-PRF-38534 Qualification Status and Radiation Status


  • POL Applications
  • Intermediate Bus Converter
  • Satellite System Power Supply
  • Step Down Synchronous Regulator
  • High Efficiency Subsystem Supply