ON Semiconductor MC78M12CDTRKG 12V 500mA Linear Voltage Regulator, TO-252-3

The ON Semiconductor MC78M12CDTRKG is a fixed, positive linear voltage regulator designed for efficient and reliable local, on-card voltage regulation. It functions identically to the popular MC7800 series but is specified for a maximum output current of 500mA, making it ideal for applications where space and power requirements are more moderate.

This robust three-terminal regulator incorporates several key protective features to ensure stable operation under demanding conditions. Internal current limiting safeguards the device against excessive current draw, while internal thermal overload protection automatically shuts down the regulator if temperatures become unsafe. Output transistor safe-area compensation further enhances its ruggedness, protecting the internal pass transistor. With a low output noise voltage of just 75μV and a dropout voltage of 2VDC, it provides a clean and stable 12V output from an input voltage ranging between 14V and 35V.

Key Features & Specifications

• Fixed Output Voltage: Provides a steady 12V output.
• Output Current: Maximum continuous output of 500mA with adequate heat sinking.
• Wide Input Range: Accepts input voltages from 14V to 35V.
• Integrated Protections: Includes thermal shutdown, short-circuit current limiting, and safe-area compensation.
• Low Noise: Output noise voltage is typically 75μV.
• Compact Package: Supplied in a surface-mount TO-252-3 (DPAK) package for space-efficient PCB design.
• Operating Temperature: Rated for a broad range from 0°C to 125°C.

As a member of the 12V 500mA Linear Voltage Regulators product range, this component requires no external components for basic operation, simplifying circuit design and reducing bill-of-materials cost. Its combination of reliability, built-in protection, and stable performance makes it a go-to choice for power management in various **com