The Future of Analog IC Technology
Offline Inductor-Less Regulator
For Low Power Applications
The MP103 provides an easy and low cost
ACDC solution for less than 1W applications. It
is an off-line linear regulator that delivers good
efficiency while generating little EMI noise. It
provides an easy solution to step down the AC
line voltage to a regulated DC voltage. This off-
line linear regulator replaces the conventional
switching regulator, not needing a transformer
or an inductor. Due to its simplicity, it offers an
overall low BOM cost.
MP103 delivers nearly two times the output
power than the MP100 or MP100L by charging
its VB capacitor with an external bipolar
transistor. MP103 maximizes efficiency by
minimizing the voltage drop between VB and
VOUT, while only charging VB when VIN is less
than approximately 32V. The MP103 enables
the overall system to meet standby power
MP103 offers rich protections, such as Thermal
Shutdown (TSD), Over Temperature Protection
(OTP), VB Over Voltage Protection (OVP), VB
Short to GND Protection, Over Load Protection
(OLP), Short Circuit Protection (SCP), MP103 is
available in the SOIC8E package.
• Universal AC Input (85Vac-305Vac)
• Less than 100mW standby power
• Excellent EMI Performance
• Lower BOM Cost
• Smart Control to Maximizes Efficiency
• Adjustable Output Voltage from 1.5V to 15V
• Good Line and Load Regulation
• Drives External BJT
• Short Circuit Protection
• External Programmable Over Temperature
• Wall switches and dimmers
• AC/DC Power Supply for Wireless System,
like ZigBee, Z-Wave
• Standby Power for General Off-Line
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
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MP103 Rev. 1.01
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