LM2574HVMX-12/NOPB

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PMIC (Power Management IC) devices are an integral part of any power management system. They integrate multiple functions and enhance the performance, reliability and efficiency of the system. LM2574HVMX-12/NOPB is a wide input range, high-performance synchronous DC-DC switching regulator. It is specifically designed for single output dc-dc conversion in automotive, industrial, communications and consumer applications.

Application Field & Working Principle

The LM2574HVMX-12/NOPB is a wide input range, synchronous step-down DC-DC switching regulator, featuring an internal low on-resistance, totem-pole switch. It operates from 4.5V to 68V input, and is available in 2A, 3A, and 5A switch current options. The LM2574HVMX-12/NOPB is an excellent choice for automotive, communications, consumer, and industrial applications.

The data sheet for the LM2574HVMX-12/NOPB, provides an example of its application field and working principle. It\'s a wide-input-range, synchronous-step-down dc-dc switching regulator with internal low on-resistance totem-pole switch and integrated 900 mV feedback voltage. Its internal circuitry ensures maximum efficiency and fast transient recovery times. It also offers adjustable current limit, power good signal, frequency shift and adjustable soft start.

The LM2574HVMX-12/NOPB is designed to provide an adjustable output voltage up to 12V. The output voltage is programmed by a single external resistor. The internal totem pole switch also allows the device to power down into an ultra-low current sleep mode < 0.6µA. The device provides both cycle-by-cycle current limit and input under-voltage lockout for system protection.

The operating frequency of the device can be adjusted by a voltage level on the FREQ pin. This allows system designers to optimize the tradeoff between efficiency and external component size. The device also features a power good signal, so the system can verify the output voltage of the regulator before enabling the supply to the rest of the system.

The output voltage of the LM2574HVMX-12/NOPB is also adjustable through an adjustable soft start pin. The soft start pin is internally driven by an RC circuit, and can be used to reduce load and output voltage transients during startup. This feature helps reduce system-level stress due to inrush currents at startup, while also providing efficient start-up operation.

Overall, the LM2574HVMX-12/NOPB is an ideal choice for systems requiring a wide input range, high performance, and high current step-down converter. It is able to provide adjustable output voltage up to 12V, integrated 900 mV feedback voltage and optimized frequency adjustment. With its power good output, efficient cycle-by-cycle current limit, and adjustable soft start, it is well suited for automotive, communications, consumer, and industrial applications.

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