New Industry Products

Non-Isolated, Offline Regulator, Supplies up to 4W with Lower EMI

November 01, 2019 by Paul Shepard

The MP173A from Monolithic Power Systems, Inc. is a primary-side regulator that provides accurate constant voltage (CV) regulation without an optocoupler. It supports buck, boost, buck-boost, and flyback topologies.

The device's integrated 700V MOSFET simplifies the structure and reduces cost. This feature optimizes the device for offline, low-power applications, such as home appliances and standby power.

The MP173A is a green mode operation regulator. 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.

The MP173A is available in TSOT23-5 and SOIC-8 packages.

Product features include:

  • Primary-Side CV Control
  • Supporting Buck, Buck-Boost, Boost, and Flyback Topologies
  • Integrated 700V MOSFET and Current Source
  • Under 30mW No-Load Power Consumption
  • Up to 4W Output Power
  • Maximum DCM Output Current Below 180mA
  • Maximum CCM Output Current Below 280mA
  • Low VCC Operating Current
  • Frequency Foldback
  • Limited Maximum Frequency
  • Peak Current Compression
  • Internally Biased VCC
  • TSD, UVLO, OLP, SCP, and Open-Loop Detection
  • Available in TSOT23-5 and SOIC-8 Packages