MC78M18CTG

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The MC78M18CTG is a Three-Terminal Positive Linear Voltage Regulator. It is part of the NCP and SC Series Regulators manufactured by ON Semiconductor. This regulator operates with an input voltage of up to 18 Volts and offers an output current of up to 1.8 Amperes. The MC78M18CTG offers both protection against overvoltage and current limiting.

The MC78M18CTG is designed for a variety of general applications, such as portable/desktop computers, telecommunications equipment, audio/video systems, toys and industrial controls. It is also used in automotive applications such as sensors and actuators.

The MC78M18CTG is constructed with a PNP-type output transistor and a zener diode for providing a safe voltage reset. This device has a built-in thermal shutdown circuit that prevents device damage caused by over-temperature. The device also features active current limiting and reverse-battery protection.

The MC78M18CTG has a wide operating temperature range of -40°C to +125°C. This regulator is available in three different pin configurations: 8 2,5x5mm SMD, 6 TO-252-5 and 8 TO-220-5. It has an output voltage range of 7V to 18V.

In operation, the MC78M18CTG is designed to maintain a constant output voltage. An input voltage is applied to the device\'s input terminal and this voltage is regulated down to a specified level at the output terminal based on the device\'s feedback circuit. An external resistive feedback network is connected between the output and the device\'s Timing Capacitor (C T ) terminal to set the output voltage level. A resistor divider network is connected between the output and the device\'s feedback terminal to determine the device\'s regulation band. The device\'s internal feedback voltage is then compared to the external feedback voltage to control the output voltage level. The device also has Internal Soft-Start circuitry to protect against inrush currents due to capacitors charging.

In addition, the device can be used to convert an unregulated input voltage to a regulated output voltage. This is done by connecting a resistor and capacitor to the device\'s Compensating Input (C P ) terminal and setting the device\'s output voltage to the desired level. Connecting these components provides compensation to the device to regulate the voltage output.

The MC78M18CTG is a commonly used regulator that provides a reliable and cost effective solution for voltage regulation. Its wide input voltage range, constant output voltage, and low quiescent current make it an ideal choice for many portable, automotive, and industrial applications.

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