MP172A Non-Isolated Offline Regulator Monolithic Power Systems (MPS) MP172A Non-Isolated Offline Regulator 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.