LM78L12ACZXA

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Output Configuration:	Positive
Output Type:	Fixed
Number of Regulators:	1
Voltage - Input (Max):	35V
Voltage - Output (Min/Fixed):	12V
Voltage - Output (Max):	--
Voltage Dropout (Max):	--
Current - Output:	100mA
Current - Quiescent (Iq):	6mA
PSRR:	65dB (120Hz)
Control Features:	--
Protection Features:	Over Temperature, Short Circuit
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Supplier Device Package:	TO-92-3
Base Part Number:	LM78L12

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Introduction： LM78L12ACZXA

The LM78L12ACZXA is a three-terminal voltage regulator intended for use in linear regulators in applications such as computers, office equipment, and industrial or consumer electronics. Its adjustable output voltage makes it suitable for operation in a wide range of applications. It is capable of providing up to 4 Amps of output current, making it suitable for a variety of designs. It also includes a range of protection features, such as short circuit protection, overcurrent protection, and thermal overload protection, which help to ensure the reliability of the regulator.

Application Field

The LM78L12ACZXA is a versatile linear regulator with a wide range of applications, including computers, office equipment, and industrial or consumer electronics. It is suitable for use in HTPCs, media players, and similar devices, where it can form the core of a power supply, providing the necessary voltage to run other components and ensuring a stable power supply. It can also be used in applications such as surveillance systems, security systems, and other systems that require precise voltage regulation.

Working Principle

The LM78L12ACZXA is a three-terminal linear regulator, comprising an input terminal, an output terminal, and an adjust terminal. It operates by comparing the voltage at the output terminal to that at the adjust terminal. When the voltage at the output terminal is higher than at the adjust terminal, the regulator increases the amount of current entering the output terminal and decreases the amount of current entering the input terminal. The result is that the regulator reduces the voltage at the output terminal, bringing it back to the desired level.The output voltage of the regulator can be adjusted by varying the voltage at the adjust terminal. This is accomplished by means of a pair of resistors, one connected between the adjust terminal and the output terminal, and the other connected between the adjust terminal and ground. By varying the ratio of these two resistors, the output voltage of the regulator can be adjusted.The LM78L12ACZXA also includes protection features, such as overcurrent protection, short circuit protection, and thermal overload protection. These features help to ensure the reliability of the regulator and protect against unexpected faults in the system.

Conclusion

The LM78L12ACZXA is a versatile three-terminal voltage regulator intended for use in linear regulators. Its adjustable output voltage make it suitable for a wide range of applications, such as computers, office equipment, and industrial or consumer electronics. It is capable of providing up to 4 Amps of output current, making it suitable for a variety of designs. It also includes a range of protection features, such as short circuit protection, overcurrent protection, and thermal overload protection, which help to ensure the reliability of the regulator.

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