LM2574N-12/NOPB

Voltage - Output (Min/Fixed):	12V
Base Part Number:	LM2574
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	52kHz
Current - Output:	500mA
Voltage - Output (Max):	--
Series:	SIMPLE SWITCHER®
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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LM2574N-12/NOPB Application Field and Working Principle：PMIC - Voltage Regulators - DC DC Switching Regulators

The LM2574N-12/NOPB is a monolithic integrated circuit and is specifically designed as a step-down voltage regulator with adjustable output voltages. The device is available in a standard adjustable version as well as fixed versions with 3.3V and 5V outputs. This device is ideal for use as a power supply that has to step down from higher voltage sources, such as a wall plug or a battery.The LM2574N-12/NOPB is a pulse-width modulation (PWM) type voltage regulator. It consists of an oscillator, a PWM controller, a power switch, current sensing circuitry and an over-current protection circuit. It also includes an under-voltage lockout (UVLO) circuit, an over-temperature protection circuit, and various monitoring and control pins. All these functions are integrated into a single 8-pin package, making it ideal for applications in which cost, size and simplicity are important factors.The LM2574N-12/NOPB has an adjustable feedback voltage, allowing it to produce different output voltages which can be adjusted by changing resistor values. This allows the user to tailor the output voltage to match the requirements of the application. The voltage output is then controlled by a pulse-width modulation controller. This controller regulates the regulation voltage by varying the width of the pulses to achieve the desired output. The current sensing circuit uses an external resistor to sense the load current and the over-current protection circuit trips if the sensed current exceeds its limit.The LM2574N-12/NOPB also comes with an UVLO circuit which monitors the input voltage and will shut down the device if the voltage goes below or above the pre-set limit. This helps to protect the device from damage due to over-voltage or under-voltage. Additionally, it also features an over-temperature protection circuit which shuts down the device if the temperature of the device goes above a pre-set limit.The LM2574N-12/NOPB is a switching regulator, where the output voltage is regulated by switching the power switch on and off, resulting in a pulse-width modulation signal at the output. It is designed to be used in applications where cost, size and simplicity are of prime importance, such as LED lighting systems, portable electronic devices, industrial equipment, and telecom DC/DC conversion.Overall, the LM2574N-12/NOPB is an integrated monolithic voltage regulator that provides excellent regulation and protection in an 8-pin surface mount package. It is the ideal choice for applications that require adjustable output voltages, excellent regulation accuracy and protection from over-voltage and under-voltage input conditions. Additionally, it has over-temperature protection, current sensing and adjustable feedback option for enabling its use in a wide range of applications. It is a highly reliable device, making it suitable for use in industrial applications as well as portable consumer electronics.

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