700V, Non-Isolated, Offline Regulator,
Up to 60mA Output Current
with Improved EMI Performance
The MP171A is a primary-side regulator that
provides accurate constant voltage (CV)
regulation without an optocoupler. It supports
buck, boost, buck-boost, and flyback
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 MP171A 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 MP171A is available in TSOT23-5 and
Primary-Side CV Control
Supports Buck, Boost, Buck-Boost, and
Integrated 700V MOSFET and Current
Under 30mW No-Load Power Consumption
Up to 2W Output Power
Maximum DCM Output Current below
Maximum CCM Output Current below
Low VCC Operating Current
Limited Maximum Frequency
Peak Current Compression
Internally Biased VCC
TSD, UVLO, OLP, SCP, Open-Loop
Available in TSOT23-5 and SOIC-8
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”, the MPS logo, and “Simple, Easy Solutions” are
registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
MP171A Rev. 1.0
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