The Future of Analog IC Technology
Power Solution with Ultra-Low Standby
Power, Integrated Switching Regulator,
Linear Regulator, and Relay Driver
The MP161 integrates a 700V switching
regulator, a low-dropout linear regulator, and
two channel relay drivers. The MP161 also has
a special standby mode to minimize standby
power. The MP161 is designed for home
automation, industrial automation, and any
other applications that adopt relays and MCUs.
The 700V switching regulator adopts constant
voltage (CV) regulation with internal loop
compensation. Light-load efficiency is optimized
by proper modulation of the switching frequency
and peak current. Various protections are also
included to guarantee reliable operation.
The integrated low-dropout linear regulator is
able to operate with an input up to 30V. The
output voltage is fixed at either 5V or 3.3V. The
MP161 also has over-temperature protection
Built-in relay drivers are intended to drive up to
two relays using the switching regulator output.
Freewheeling diodes are integrated to cut down
When standby mode enabled, the switching
regulator output voltage is lowered to reduce
The MP161 is available in a SOIC-16 package.
* Parts are under development. All following descriptions and data
related to these parts are subject to change.
700V Switching Regulator
Integrated 700V MOSFET and Current
Constant Voltage (CV) Regulation with
Internal Loop Compensation
Optimized Light-Load Efficiency by
Anti-Audible Noise Operation by Peak
Adjustable or Fixed 12V Output
Low Operating Current
Over-Temperature Protection (OTP), Short-
Circuit Protection (SCP), Overload
Protection (OLP), and Over-Voltage
Low-Dropout Linear Regulator
Up to 30V Input Voltage
Fixed Output, with 3.3V and 5V Options
Over-Temperature Protection (OTP)
2Ω On State Resistance
Rail Voltage up to 30V
Integrated Freewheeling Diode
Nominal Off Driver
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.
MP161 Rev. 1.0
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