MC78M12ABT 12V 500mA Voltage Regulator
Description Marked "MC78M12ABT" on the package, this is ON Semiconductor's MC78M12ABT (from the MC78M00A series), a 3-terminal positive linear voltage regulator. It is engineered to provide a fixed $12\text{ V}$ output with a high accuracy...
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Description Marked "MC78M12ABT" on the package, this is ON Semiconductor's MC78M12ABT (from the MC78M00A series), a 3-terminal positive linear voltage regulator. It is engineered to provide a fixed $12\text{ V}$ output with a high accuracy tolerance ( $\pm 2\%$ ) and deliver up to $500\text{ mA}$ of continuous output current when paired with adequate heat sinking. The MC78M12 incorporates built-in thermal overload protection, internal short-circuit current limiting, and output transistor safe-area compensation, making it robust against electrical faults and load fluctuations. Key Specifications Type: Positive Fixed Linear Voltage Regulator Manufacturer: ON Semiconductor (onsemi) Package Marking: MC78M12ABT Package: TO-220 (3-pin through-hole) Output Voltage ( $V_{OUT}$ ): $12\text{ V}$ (Fixed, $\pm 2\%$ tolerance) Input Voltage Max ( $V_{IN}$ ): $35\text{ V}$ Output Current ( $I_{OUT}$ ): $500\text{ mA}$ ( $0.5\text{ A}$ ) max Dropout Voltage ( $V_{IN} - V_{OUT}$ ): $2.0\text{ V}$ typical Ripple Rejection (PSRR): $80\text{ dB}$ at $120\text{ Hz}$ Quiescent Current ( $I_B$ ): $3.2\text{ mA}$ typical Operating Temperature Range: $-40^\circ\text{C}$ to $+125^\circ\text{C}$ Common Applications Local on-card voltage regulation for embedded systems Power distribution networks and industrial control boards Post-regulator for switching power supplies to reduce voltage ripple Power supply modules for sensors, microcontrollers, and operational amplifiers Package Includes 1 x ON Semiconductor MC78M12ABT 12V 500mA Voltage Regulator (TO-220)
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