MC78M12ACT

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The MC78M12ACT is an adjustable linear voltage regulator that uses an externally adjustable series pass-transistor configuration. It provides a maximum output current of 1.5 A with an adjustable voltage output range of 1.2-37 V. This voltage regulator is designed to provide a stable output voltage in the presence of varying line and load conditions. It offers a wide range of features including current limiting, thermal shutdown and adjustable output voltage. The MC78M12ACT has wide application fields in low noise switch mode power supply, DC/DC converter, on-board power system and noise-sensitive equipment.

The basic working principle of the MC78M12ACT is similar to that of conventional series pass regulators. It uses an external transistor to regulate output voltage. The MC78M12ACT uses a voltage reference source as a reference for the output voltage. An error Amp senses the difference between the actual output voltage and the reference voltage. The error Amp controls the external series pass transistor to adjust the output voltage. The voltage regulating loop constantly adjusts the series pass transistor to maintain the output voltage at the desired level.

The MC78M12ACT includes several features to protect the circuit. The current limiting circuit prevents the output current from exceeding the predefined limit. The thermal shutdown circuit provides protection against abnormal operating temperatures and protects the circuit against damage. The integrated regulator also has an adjustable output voltage which allows users to set the output voltage to their required level.

The MC78M12ACT has a wide range of applications in low noise switch mode power supply, DC/DC converter, on-board power system, and noise-sensitive equipment. It can provide a stable and reliable output voltage in the presence of varying line and load conditions. The voltage regulator also offers protection features including current limiting, thermal shutdown and adjustable output voltage. The adjustable output voltage of the MC78M12ACT allows users to set the voltage according to their requirements. Therefore, the MC78M12ACT is an ideal solution for various applications that require adjustable and stable output voltage.

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