MC78T12ACT

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The MC78T12ACT is a 3-terminal positive voltage regulator with a typical output current of 1.5A. It is part of the Linear Voltage Regulators category of Power Management Integrated Circuits (PMIC). The MC78T12ACT offers excellent regulation of output voltage and superior response to transients due to its very low output impedance and fast recovery time of the internal pass element. It is specifically designed for applications where a regulated output voltage is required with minimal external components.

The MC78T12ACT is highly configurable to meet a variety of application demands. Its output voltage range is between 5V and 20V, and its input voltage can be as low as 4.5V or as high as 50V. Its operating temperature range is between -40 to 105 degrees Celsius. It features overvoltage protection and current limiting, with a maximum power dissipation of 37W in a free air environment.

In terms of its application field, the MC78T12ACT is ideal for powering various devices. It can be used in automation, building automation, medical equipment, industrial control equipment, instrumentation, test and measurement systems, and automotive applications.

The MC78T12ACT also offers a range of features to make it easy to integrate into a wide variety of systems. Its thermal protection and current limiting features ensure proper operation over its full temperature range and maximum safe power dissipation. It also features an inactive supply pin to provide protection against false startup due to a no-load condition.

The working principle behind the MC78T12ACT is the same as that of all linear voltage regulators. It uses an internal pass element to regulate the output voltage. This element is usually a transistor, but can also be a transformer, a Zener diode, or a resistor.

The MC78T12ACT uses a three-terminal system for regulation. The input voltage is connected to the IN terminal, the ground or reference voltage is connected to the GND terminal, and the output voltage is connected to the OUT terminal. The output voltage is regulated by varying the amount of current flowing between the IN and GND terminals, thereby controlling the power dissipated in the internal pass element.

The MC78T12ACT also has several safety features to ensure reliable operation and protect the IC. It features built-in overvoltage protection, current limiting, and thermal shutdown features. These features help protect the IC and its surrounding components and ensure that the output voltage remains in its specified range.

Overall, the MC78T12ACT is a powerful, reliable and highly configurable regulator with excellent features and operating characteristics. Its wide input voltage range and versatility make it ideal for many applications. Its built-in safety features make it safe to use in any system and help ensure reliable operation over its full temperature range.

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