MP158

Small, Energy-Efficient, Off-line Regulator

30mW No-Load Power Consumption

MP158 Rev. 1.0

www.MonolithicPower.com

1

10/17/2014

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© 2014 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

MP158 is a primary-side regulator that provides

accurate constant voltage (CV) regulation

without opto-coupler. It supports Buck, Buck-

Boost, Boost and Flyback topologies. It has an

integrated 500V MOSFET to simplify the

structure and reduce costs. These features

make it an ideal regulator for off-line low power

applications, such as home appliances and

standby power.

MP158 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, thus

improving the overall average efficiency.

MP158 features various protections, including

thermal shutdown (TSD), VCC under-voltage

lockout (UVLO), overload protection (OLP),

short-circuit protection (SCP), and open loop

protection.

MP158 is available in small TSOT23-5 package

and SOIC8 package.

FEATURES

• Primary-side constant voltage (CV) control,

supporting Buck, Buck-Boost, Boost and

Flyback topologies

• Integrated 500V MOSFET and current

source

• <30mW no-load power consumption

• Up to 2W output power

• Maximum DCM output current less than

40mA

• Maximum CCM output current less than

70mA

• Low VCC Operating Current

• Frequency foldback

• Limited maximum frequency

• Peak-current compression

• Internally biased VCC

• Thermal shutdown (auto restart)

• VCC under voltage lockout with hysteresis

• Timer based over-load protection.

• Short-circuit protection

• Open-loop protection

APPLICATIONS

•

Home appliances, white goods and

consumer electronics

•

Industrial controls

•

Standby power

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic Power

Systems, Inc.

TYPICAL APPLICATION