The MC7905BD2TR4G is a monolithic integrated circuit voltage regulator from ON Semiconductor. It is a negative 5V linear voltage regulator with a current rating of 1A, capable of providing a constant 5V output voltage over a wide range of input voltages. The device is packaged in a TO-220 package, and is part of the MC7900 series of regulators, which feature greater power dissipation and operating temperature range than their predecessors. It provides over-temperature protection, short-circuit protection, and reverse-voltage protection, and is well-suited for a variety of applications, including overvoltage protection, motor-control applications, and voltage monitoring.