MC7815ABD2TG

Current - Output:	1A
Base Part Number:	MC7815
Supplier Device Package:	D2PAK
Package / Case:	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	80dB (120Hz)
Current - Quiescent (Iq):	6mA
Series:	--
Voltage Dropout (Max):	2V @ 1A (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	15V
Voltage - Input (Max):	35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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MC7815ABD2TG Application Field and Working Principle

The MC7815ABD2TG is a three-terminal adjustable positive voltage regulator or voltage reference device, specifically developed as a linear voltage regulator or reference. It is a member of the popular MC7800 series of linear voltage regulators, which feature a low dropout voltage, low quiescent current and a high output current.

Application

The MC7815ABD2TG is suitable for a wide range of applications including 5V voltage references, switching power supplies, UPS systems, DC-DC converters, voltage regulators and other power management systems. It is designed for use in a wide range of current and voltage requirements and is able to maintain a regulated output voltage even when the input voltage and load current vary.

Features and Benefits

The MC7815ABD2TG has several features and benefits that make it attractive for use in a wide range of applications. These features include:- Low dropout voltage of 2.2V.- High current capability with up to 1.5A output.- High performance with a ripple rejection ratio of 80dB or better.- Adjustable output voltage ranging from 1.2V to 37V.- Adjustable current limit of up to 1.5A.- Short circuit protection with the addition of an external resistor.- Low quiescent current of only 18µA (typical).- Thermal and over-voltage protection.

Working Principle

The MC7815ABD2TG works on the simple principle of a voltage regulator, which is to maintain a regulated voltage output even when the input voltage and load current vary. The device contains an internal voltage reference, an error amplifier, a series pass element and current limiting circuitry. When the output voltage begins to drop, the error amplifier senses this drop in voltage, which in turn triggers the series pass element to increase the current passing through it. The increased current feeds back to the output voltage and restores it to the set point. The series pass element is a transistor structure that is operated in common emitter configuration and functions by controlling the current passing between the output and the input. When the output voltage rises, the error amplifier senses this rise in voltage and reduces the current flowing through the series pass element, thus drops the output back to the set point. The MC7815ABD2TG contains protection circuitry that is designed to protect the device from high current, thermal, and over-voltage situations. This protection circuitry is triggered if any of these conditions occur, which shuts down the device and produces a latch off state. Once the condition is removed, the device can be reset.

Conclusion

The MC7815ABD2TG is a three-terminal adjustable positive voltage regulator or voltage reference device, specifically developed as a linear voltage regulator or reference. It features a low dropout voltage, low quiescent current, and a high output current, making it suitable for a wide range of applications including 5V voltage references, switching power supplies, UPS systems, DC-DC converters and voltage regulators. The device works on the principle of a voltage regulator and contains an internal voltage reference, an error amplifier, a series pass element, current limiting circuitry and protection circuitry.

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