MC78M08ACT

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The MC78M08ACT is a series of positive adjustable voltage regulators specifically designed for industrial, commercial and automotive applications. These devices are particularly well suited for battery-powered systems, where the low current drain is a major advantage. They operate from an input voltage of up to 40 V and provide a minimum output of 1.25 V with a maximum of 8 V. This makes them extremely versatile and suitable for a wide variety of applications.

The MC78M08ACT has a wide range of features that make it well suited for voltage regulating and monitoring applications. It features a wide adjustment range, low quiescent current, low dropout voltage, high accuracy and stability and an input undervoltage lockout circuit. It also features a temperature compensation circuit and a current-limiting circuit to protect against over current or overload conditions.

The working principle of the MC78M08ACT is based on the classic three-terminal linear regulator. It features an error amplifier with a differential input clamping circuit to prevent input voltage excursions that could cause output voltage regulation failure. It also has a gain-adjustment circuit for fine tuning of the output voltage. It consists of a reference voltage source, a series-pass transistor, a current-limiting circuit, and a voltage divider between the output and ground.

The reference voltage from the thyristor is applied to an error amplifier which compares it to the output voltage and then adjusts the base bias of the series-pass transistor. This adjusts the current flow through the transistor and increases or decreases the output voltage accordingly. A voltage feedback loop keeps the output voltage in balance and a current-limiting circuit prevents excessive current drain.

The MC78M08ACT can be used in a variety of industrial, commercial and automotive applications. This includes voltage regulation and monitoring in battery-powered systems, regulated DC power supplies and electronic control systems. It is also suitable for use in portable and instrumentation equipment, telecommunications, medical equipment and other applications requiring precise output voltage regulation.

Due to its low quiescent current, the MC78M08ACT is ideal for use in low-voltage battery-powered systems, where the current drain requirements are very small. It is also very efficient, making it suitable for use in applications where heat dissipation requirements are low. The high accuracy and stability of the output voltage make it ideal for use in precision voltage regulation applications.

In summary, the MC78M08ACT is a versatile three-terminal linear regulator that can be used in a variety of applications. Its low quiescent current, wide adjustment range and accurate output voltage regulation make it well suited for use in battery-powered systems, regulated DC power supplies and other applications requiring precise voltage regulation.

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