LM2574M-12/NOPB

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The LM2574M-12/NOPB belongs to the category of DC DC switching regulators, but the device is of the advanced step-down type, capable of producing regulated outputs of 12V or less from a wide variety of input sources, providing a high level of functionality in a small package. The device is composed of a fixed frequency, current mode control circuit with a 1A internal switch and an over current protection circuit.

The device\'s advanced features offer a virtually unlimited number of applications in the power supply applications, especially those requiring low power consumption. The device is easy to use and highly efficient, providing an input voltage range from 4V to 40V and an output voltage range from 0.9V to 12V, making it suitable for powering portable or handheld devices, as well as general-purpose power conversion applications.

The LM2574M-12/NOPB is capable of delivering up to 1.5A of continuous output current to a regulated output, with a total peak output current of 3A. The regulation accuracy is typically 0.2%, while the operating temperature range is -40°C to +125°C. The device also features a wide input voltage range, featuring a typical value of 4.5V to 40V, and a maximum input voltage of 60V.

The device features a frequency-compensation circuit that can be externally programmed to match the required parameters, as well as internal voltage limiting, and thermal shutdown. The device is also equipped with a Power Good logic signal, to provide an indication of the output voltage.

As for the working principle of the LM2574M-12/NOPB, the devices works by offering a fixed frequency, current mode control of the output voltage. The device operates in an operating frequency range of 13KHz to 1MHZ, with a duty cycle ranging from 0% to 100%, allowing for easy control of the output voltage. The duty cycle is controlled by the current feedback, which is compared to the voltage feedback, in order to regulate the output voltage. The output voltage is then regulated through the internal switch, which is connected to the input and output, and serves to regulate the output voltage.

The integrated over current protection of the device helps to protect it against current overloads, up to a maximum of each of the peak current values listed in the device\'s datasheet. The device also features a power good signal, which is used to indicate when the voltage is at the desired value. The device also features an adjustable soft-start feature, which allows the system to be turned on safely, without drawing large inrush currents.

In conclusion, the LM2574M-12/NOPB is a highly versatile and efficient DC-DC converter, suitable for a wide range of applications. The device is easy to use and offers a wide range of features, including adjustable frequency-compensation, adjustable voltage limit, and precise output regulation. The device also features a power good signal and an adjustable soft-start feature, making it suitable for virtually any power conversion application.

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