MC78M15CT

Voltage - Input (Max):	35V
Voltage - Output (Min/Fixed):	15V
Voltage - Output (Max):	--
Voltage Dropout (Max):	--
Current - Output:	500mA
PSRR:	70dB (120Hz)
Control Features:	--
Protection Features:	Over Temperature, Short Circuit
Operating Temperature:	0°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	TO-220-3
Supplier Device Package:	TO-220AB
Base Part Number:	MC78M
Series:	--
Packaging:	Tube
Part Status:	Obsolete
Output Configuration:	Positive
Output Type:	Fixed
Number of Regulators:	1

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MC78M15CT Application Field and Working Principle

MC78M15CT is an Adjustable, Positive Voltage Regulator designed to provide 15 Volts output and a maximum load current of up to 1.5 Amps. It is a three-terminal device and a monolithic shunt regulator with an adjustable voltage reference. It belongs to the category of linear voltage regulators, which provides the regulated output voltage by maintaining a constant voltage drop across the series pass element.

Features

This device offers several features that are listed below:

• Low dropout voltage
• Current limit protection
• Output voltage adjustable from 1.2 V to 37 V
• Precision current limit and thermal overload protection circuitry
• Low quiescent current
• Fast Transient Response

Design

The MC78M15CT consists of three terminals, input voltage, ground and output voltage. It contains a series pass element and a shunt element to provide the regulated output voltage. The series pass element, or the internal power transistor, will conduct a current proportionate to the voltage drop and the output terminal voltage. When the series pass element is fully on, it conducts a fixed current to the output terminal, limited by the current limit circuit. The shunt element then initiates a feedback loop, which maintains the internal reference voltage at a constant level. This voltage is then compared to the input voltage to regulate the required output voltage.

Application Field

The MC78M15CT can be used in various applications where a regulated output voltage is required. Some of the most common applications include power supplies, DC-DC converters, battery chargers, computer peripherals, and telecom equipment. The low dropout voltage and wide input voltage range make it an ideal choice for cost-sensitive applications. The current limit protection and the thermal overload protection make it suitable for short-circuit or overload conditions.

Conclusion

The MC78M15CT is a reliable and cost-effective device that can be used in power supply applications. It offers several features such as low dropout voltage, current limit protection, wide input voltage range, and thermal overload protection, making it suitable for various applications.

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