LM2575-12YN

Voltage - Output (Min/Fixed):	12V
Base Part Number:	LM2575-12
Supplier Device Package:	16-DIP
Package / Case:	16-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	52kHz
Current - Output:	1A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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LM2575-12YN Applications and Working Principle

The LM2575-12YN is a switching regulator available in TO-220 or DD-Pak packages. It is part of National Semiconductor\'s SwitchingVoltage Regulators\' catalog, and is considered a DC-DC step-down regulator. It is made to operate from input voltages of 4.5V to 40 V and delivers an output voltage of 3.3V as a standard. It is a monolithic integrated circuit, capable of delivering different regulated voltages depending on the specific application.The LM2575-12YN switching regulator has a wide range of uses, for commercial, industrial and consumer applications. It can be found in car stereos, cellular phones, printers, other consumer electronics, and in industrial equipment, such as electronic measuring instruments, inverters and medical equipment. The main advantage of using a switching regulator instead of an ordinary linear regulator is that it can provide higher output current and efficiency at the same cost.The working principle of the LM2575-12YN involves two main steps. First, it uses an internal oscillator to generate a high frequency (typically between 90kHz and 550kHz) square wave. This square wave is then fed to the switching transistor which is connected to the primary winding of the transformer. This creates magnetic flux in the transformer core and since it is a coupled transformer, this flux induces voltage in the secondary winding. This voltage is rectified by a diode and filtered by an output capacitor. This process is known as power conversion, and it is done continuously in order for the circuit to keep providing a regulated output voltage.The LM2575-12YN also includes several features to improve reliability and performance. It includes a current limit, which is a kind of protection against short-circuits, and an over temperature protection which shuts down the output when the temperature reaches a certain level. It also includes an enable control pin which can be used to control the output, and a feedback control pin, which can be used to set the output voltage.Overall, the LM2575-12YN switching regulator is a versatile and reliable component that can be used in a wide range of applications. Its features, such as its wide range of input voltages, enable control pin and high efficiency, allows it to be used in a variety of different electronic designs. Thanks to its simple and efficient working principle, it should continue to be one of the preferred switching regulators used in the industry.

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