MC7812BDTRKG

Current - Output:	1A
Base Part Number:	MC7812
Supplier Device Package:	DPAK
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	60dB (1kHz)
Current - Quiescent (Iq):	8mA
Series:	--
Voltage Dropout (Max):	2V @ 1A (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MC7812BDTRKG Application Field and Working Principle

Introduction

The MC7812BDTRKG is an integrated, low-dropout, linear voltage regulator that is used in a wide variety of applications. It is an ideal choice for many entry-level and mid-range power systems, providing both voltage and current regulation with low noise and excellent efficiency. With a wide range of output current ratings available, the MC7812 is suitable for a variety of different power architectures and electrical loads.

Application Field

The MC7812 is one of the most popular and commonly used linear voltage regulators. It is often employed within consumer and industrial electronics, providing a regulated voltage rail for a variety of integrated and discrete circuits.The MC7812 is also suitable for use in applications where low-noise, high-efficiency and low-cost are important factors. Some of these include computer power, telecommunications, battery-powered systems and automotive electronics. In many cases, the MC7812 can be used to reduce or eliminate the use of output voltage-reducing elements, a move that can shrink design size and cost.

Working Principle

The main purpose of the MC7812 is to convert unregulated input voltage into a regulated output voltage. The MC7812 achieves this by employing a three-terminal configuration of an input pin, an output pin, and a ground pin. An internal voltage reference circuit is used to regulate the output voltage, while an error amplifier adjusts the reference voltage in order to correct any output voltage deviation. To control the current flow, an inner PNP transistor is used. After voltage is supplied to the input pin, it travels through the transistor’s emitter, the resistance connected to its base, and eventually reaches the output pin. Here, the voltage becomes stable and the regulator adjusts the voltage to maintain accuracy. An adjustment pin can also be used in some cases to provide additional control over the output voltage.

Conclusion

The MC7812BDTRKG is a three-terminal linear voltage regulator that is suitable for a variety of power systems. It can be used to convert a wide range of input voltages into a regulated output voltage with low noise and excellent efficiency. It is also available in a wide range of output current ratings, making it suitable for a variety of different power architectures and electrical loads. The MC7812 achieves this through a series of internal components, including an internal voltage reference circuit, an error amplifier, and a PNP transistor. The regulator can also be adjusted with an external pin in some cases, allowing the output voltage to be adjusted accordingly.

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