MP17xA Non-Isolated Offline Regulators

MP17xA Non-Isolated Offline Regulators

MPS’ MP17xA series non-isolated offline regulators feature an integrated 700 V MOSFET and offer up to 280 mA output current with improved EMI performance

Monolithic Power Systems’ MP17xA series are primary-side regulators that provide accurate constant voltage (CV) regulation without an optocoupler. These devices support buck, boost, buck-boost, and flyback topologies. The devices’ integrated 700 V MOSFET simplifies the structure and reduces cost. This feature optimizes the devices for offline, low-power applications, such as home appliances and standby power. The MP17xA series are green mode operation regulators. Both the peak current and switching frequency lower as the load decreases. This feature provides excellent efficiency at light load and improves the overall efficiency. Protection features include thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), and open-loop detection. These devices are available in TSOT23-5 and SOIC-8 packages.


  • Primary-side CV control
  • Support buck, buck-boost, boost, and flyback topologies
  • Integrated 700 V MOSFET and current source
  • Under 30 mW no-load power consumption
  • Up to 4 W output power
  • Max. DCM output current below 180 mA
  • Max. CCM output current below 280 mA
  • Low VCC operating current
  • Frequency foldback
  • Limited max. frequency
  • Peak current compression
  • Internally biased VCC
  • TSD, UVLO, OLP, SCP, and open-loop detection
  • Available in TSOT23-5 and SOIC-8 packages

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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