The Future of Analog IC Technology
700 V Non-Isolated Off-Line Regulator
Up to 280 mA Output Current
MP173 is a primary-side regulator that provides
accurate constant voltage (CV) regulation
without an opto-coupler. It supports buck, boost,
buck-boost, and flyback topologies. It has an
integrated 700 V MOSFET to simplify the
structure and reduce cost. These features make
it an ideal regulator for offline, low-power
applications, such as home appliances and
MP173 is a green-mode-operation regulator.
Both the peak current and switching frequency
decrease as the load decreases. This feature
provides excellent efficiency at light load and
improves the overall average efficiency.
MP173 has various protection features
including thermal shutdown (TSD), VCC under-
voltage lockout (UVLO), overload protection
(OLP), short-circuit protection (SCP), and open-
MP173 is available in a small TSOT23-5
package and SOIC-8 package.
Primary-Side CV Control, Supporting Buck,
Boost, Buck-Boost, and Flyback Topologies
Integrated 700 V MOSFET and Current
< 30 mW No-Load Power Consumption
Up to 4 W Output Power
Maximum DCM Output Current Less than
Maximum CCM Output Current Less than
Low VCC Operating Current
Limited Maximum Frequency
Internally Biased VCC
TSD, UVLO, OLP, SCP, Open-Loop
Home Appliances, White Goods, and
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For
MPS green status, please visit the MPS website under Quality Assurance. “MPS”
and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
MP173 Rev. 1.0
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