LM2574HVM-5.0

Voltage - Output (Min/Fixed):	5V
Base Part Number:	LM2574
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
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):	60V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Not For New Designs
Packaging:	Tube

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LM2574HVM-5.0 Application Field and Working Principle

The LM2574HVM-5.0 is a high-efficiency switching voltage regulator from Texas Instruments specifically designed for use in a variety of applications. The device operates from an input voltage range of 4.5V to 35V and can be used to provide regulated output voltages from 0.5V to 28V. It can step-down or step-up voltages and provide up to 5A of load current. The LM2574HVM-5.0 features current and output voltage monitoring, soft-start, and thermal shutdown, making it easy to use and perfect for applications with changing output requirements. In this article, we will discuss the application field and working principle of the LM2574HVM-5.0.

Application Field

This device is typically used in modern applications such as cellular phones, personal digital assistants, medical instruments, battery-powered equipment, automotive, personal computer systems, and remotely-powered equipment. The LM2574HVM-5.0 also finds its use in a variety of industrial applications where it helps to convert a wide range of input voltage levels into a single regulated output voltage. The device helps in applications where the input voltage varies significantly due to temperature variations and transient load conditions.

Working Principle

The LM2574HVM-5.0 operates on the principle of a Pulse Width Modulated (PWM) voltage regulator. The device controls the switching of the pass transistor to regulate the output voltage. The output voltage is sensed by a voltage regulator which then provides control to the pulse-width modulated oscillator to vary the duty cycle as required. The voltage regulator is also responsible for monitoring other parameters such as load current, input voltage, temperature, and output voltage.The LM2574HVM-5.0 features a synchronous rectified power stage consisting of a high-side N-channel MOSFET with an integrated body diode, and a low-side N-channel MOSFET with an integrated body diode. The high-side and low-side MOSFETs are driven by a logic level gate driver. The gate driver protects the high-side MOSFET from any destructive voltage transients. The switching frequency of the device is adjustable by an external resistor, and the device utilizes peak current mode control to keep the output voltage constant.

Conclusion

The LM2574HVM-5.0 is a high-efficiency switching voltage regulator that finds its use in a wide range of applications where it helps to convert a wide range of input voltage levels into a single regulated output voltage. It features current and output voltage monitoring, soft-start, and thermal shutdown, making it easy to use and perfect for applications with changing output requirements. Moreover, the device is designed to operate with the highest possible efficiency, ensuring reliable performance and low power consumption. p>

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