MCP1258-E/UN

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MCP1258-E/UN is a simple, high-speed, high performance, single-channel regulator with integrated return switching FET and integrated Thevenin sense resistors.

MCP1258-E/UN is part of Microchip\'s DC-DC Switching Regulators family. It is a highly efficient, low-input current, single-channel buck regulator with inherent lower ripple and output voltage noise. The MCP1258-E/UN provides fast transient response and excellent load and line regulation over a wide temperature and operating voltage range. It is also equipped with integrated Thevenin equivalent return switch FET and sense resistors to sense and adjust output voltage.

The MCP1258-E/UN is designed to accept a wide input voltage range from 3.3V to 36V. It is ideal for applications that require current of up to 5A. The maximum rated output current of the regulator is 5A, and the maximum output voltage is 24V. It has a wide-range switching frequency from 200kHz to 2.3MHz, which allows for higher efficiency and is adjustable to match the external components.

The MCP1258-E/UN is also over-voltage protected, over-temperature protected, and short-circuit protected. The device features an optional Soft-Start that reduces in-rush current and can be used to program a large load current or to minimize output voltage overshoot at start-up.

In terms of application field, the MCP1258-E/UN offers great versatility with applications that require high-voltage and/or high-power solutions. The power solutions could include voltage regulation as well as DC-DC conversion. This regulator is especially suitable for high-end consumer and medical electronic products, such as MRI machines, X-ray machines, and many other high-voltage applications.

The MCP1258-E/UN adopts a single N-channel MOSFET as the power switch, which can achieve high efficiency generated by the control circuit and low switching loss. The PWM operating frequency can be adjusted as needed, and the operating frequency is inversely proportional to the output voltage. The output voltage is driven by the internal voltage error amplifier and compared with the reference voltage to maintain constant output voltage.

The most important feature of this product is the integrated Thevenin Sense Resistors, which senses the load current and provides a feedback voltage to the compensation network. The output voltage is automatically adjusted to maintain the set voltage of the Microchip PWM DC/DC buck regulator. This sensing circuit helps reduce the inductor ripple current and provides a fast transient response for a stable output voltage.

MCP1258-E/UN is a reliable DC/DC buck regulator with integrated circuit protection, wide-range input, adjustable output voltage, low input current, fast transient response and excellent line and load regulation. The integrated Thevenin sense circuit ensures stable operation and accuracy of the regulator, and its compact size, wide input voltage range and adjustable frequency make it suitable for many different high-voltage and/or high-power applications. With 3.3V to 36V input voltage range and 5A output current capability, the MCP1258 provides a cost effective, efficient, and flexible power solution for a variety of applications.

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