MC78M08ABT

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MC78M08ABT Application Field and Working Principle

The MC78M08ABT is an 8-pin linear voltage regulator made by ON Semiconductor. It provides a regulated output voltage of either 5V, 8V or 9V from an unregulated source of 5V to 18V. It can provide maximum output current of up to one amp, and can be used to power up to three circuits simultaneously. The MC78M08ABT is used in a variety of applications, such as in automotive electronics, portable battery powered devices, and chargers.

Working Principle of MC78M08ABT

The MC78M08ABT is a linear regulator, which uses a series of transistors and resistors to control output voltage. It compares the output voltage to a fixed reference voltage and adjusts the wattage required to maintain the desired voltage. The output voltage is determined by the reference voltage and the voltage divider connected to the regulator\'s feedback pin. The feedback pin is connected to the output voltage and is used to adjust the amount of current flowing through the transistors and resistors.

The MC78M08ABT uses a low-noise design to reduce the amount of electrical noise in the output voltage. The regulator also includes over-voltage and over-current protection which shuts the unit off if the output voltage exceeds the rated voltage or if the current drawn from the source is too high. This helps to prevent damage to the device or other components connected to the regulator.

Application Fields for the MC78M08ABT

The MC78M08ABT is suitable for a wide range of applications, such as automotive electronics, portable devices, chargers and power distribution systems. In automotive applications, the regulator can provide power to front-of-dash or rear-of-dash units, or to instrument panel or lighting components.

The MC78M08ABT can also be used in single cell lithium ion or lead acid batteries. It is capable of providing up to 1A output current and is designed to increase battery life by limiting the maximum charging current. It also provides trickle charging functionality and can be used to charge Li-ion and LiFePO4 batteries.

Finally, the MC78M08ABT is used in modular power supplies. It can be used to provide stable power to multiple devices, such as optical transceivers, servers, routers and storage systems, from a single source. It also supports power-up sequencing and soft-start functionality for smooth power-up and power-down operations.

Conclusion

The MC78M08ABT is an 8-pin linear voltage regulator from ON Semiconductor. It is capable of providing up to one-amp output current and is suitable for a wide range of applications, including automotive electronics, battery charging systems, and modular power supplies. The regulator also includes over-voltage and over-current protection to ensure safe operation.

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