MP103 1.5-15V Higher Power Offline Inductor-Less Regulator For Low Power SOIC8E

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MP103 1.5-15V Higher Power Offline Inductor-Less Regulator For Low Power SOIC8E

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MPS Inductor SOIC8E Power Management AC/DC Power Conversion

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MP103 1.5-15V Higher Power Offline Inductor-Less Regulator For Low Power SOIC8E

The MPS MP103 is a Higher Power Offline Inductor-Less Regulator For Low Power. It operates from a 1.5 V to 15 V input. It is supplied in a SOIC8E package.

The MP103 provides an easy and low cost ACDC solution for less than 1W applications.

Key Specifications

Part Number	MP103
Function	Higher Power Offline Inductor-Less Regulator For Low Power
Input Voltage	1.5 V to 15 V
Package	SOIC8E
Ordering Codes	MP103

Features

Universal AC Input (85Vac-305Vac)
Inductor-less
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

Typical Application Circuit

Applications

Wall switches and dimmers
AC/DC Power Supply for Wireless System, like ZigBee, Z-Wave

Design Notes

The PFC inductor must support the maximum duty cycle at the lowest line voltage, which is where saturation risk peaks.
High-voltage startup and X-capacitor discharge paths dominate no-load standby loss; verify them against the efficiency target.
Leakage inductance and the RCD clamp set the turn-off loss — snubber values are a thermal trade-off, not a fixed recipe.
Synchronous rectification timing must track the primary switching; a mistimed SR FET conducts through its body diode and fails hot.