MC78T12CT

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MC78T12CT is a linear voltage regulator manufactured by ON Semiconductor. It is designed to provide a precise, low-cost solution for fixed output voltages ranging from 2.85V to 15V. The device is available in a wide range of packages, including SOT-223, TO-220 and more recently, SOT-23. The MC78T12CT is an ideal choice for applications requiring low noise and high precision, such as medical equipment, lighting control, battery charging and protection circuits, industrial automation and more.

The MC78T12CT is a monolithic integrated circuit that includes a voltage reference, an error amplifier, a current limit circuit, and a pass element. The voltage reference in the MC78T12CT is a bandgap reference. This type of circuit uses the temperature coefficient of a diode to provide a precise voltage reference without the need for an external voltage reference. The bandgap reference is precise and stable over temperature, reducing voltage drift and improving regulation.

The error amplifier is responsible for comparing the output voltage to the internal reference voltage. A voltage difference between the two is detected, and an output signal is generated that is proportional to the difference between the two levels. This signal is then used to adjust the pass element, which is capable of delivering up to 1A of current.

The current limit circuit is also an important feature in the MC78T12CT. This circuit monitors the output current and will shut down the device if the current reaches a predefined level. This ensures that the device does not become damaged in the event of an overload. The current limit can be configured to allow for a nominal current and then adjusted for a maximum current, overcurrent protection and thermal protection.

In addition to providing a precise, low-cost solution for fixed output voltages, the MC78T12CT also offers protection against line transient. This protection feature ensures that the output voltage is not affected by sudden high-voltage or low-voltage spikes, reducing the chance of damage to connected circuits. This feature is especially useful in applications such as medical, communication and automotive.

The MC78T12CT is an ideal choice for a variety of applications. It provides precise voltage regulation, low noise, excellent protection against line transient, and it is capable of providing current up to 1A. With its wide range of packages and its range of protection features, the MC78T12CT is an excellent choice for a wide range of voltage regulator applications.

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