MP4559DN-LF-Z Integrated Circuits (ICs)

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The MP4559DN-LF-Z is a high-performance, high-efficiency, step-down DC-DC switching regulator. It offers fixed 3A, 3A and 3A continuous output current, and operates over a high input voltage range of up to 36V. It is designed with an advanced adaptive on-time control architecture, and provides excellent line and load regulation characteristics. The MP4559DN-LF-Z efficiently regulates output voltage over a wide input voltage range and load conditions with excellent load transient response.

This DC-DC converter utilizes a single power MOSFET transistor to reduce the input voltage to a regulated lower output voltage. The MP4559DN-LF-Z has an efficient in-circuit current-limited protection scheme for input overvoltage and output short-circuit protection.

Unlike linear voltage regulators, the MP4559DN-LF-Z efficiently draws less current from the input source and increases the efficiency of the power supply. The output is well regulated and the output ripple is kept low.

The product provides an adjustable output voltage in the range of 0.6 to 20V, making it suitable for a wide range of applications. It is available in an 8-LD PowerPAK package and has a wide operating temperature range from -40°C to +105°C.

The MP4559DN-LF-Z is used in various power systems in applications such as automotive and telecommunications systems, computer systems, consumer electronics, instrumentation and medical devices. It is especially suitable for powering logic, memory, and microcontrollers, as well as low power displays and lighting.

The MP4559DN-LF-Z operates in a pulse width modulation (PWM) mode when the output load is light. When the output load increases and the output current is higher than the peak current limit, it switches to pulse frequency modulation (PFM) mode which reduces the switching loss and increases efficiency.

The MP4559DN-LF-Z can achieve a high level of efficiency under light loads. It has an adjustable switching frequency that can be set through external resistive dividers. This allows the user to optimize switch node losses and reduce EMI.

The MP4559DN-LF-Z features an on-time minimum limit and a feedback compensation resistor to enhance load regulation accuracy. It also includes a UVLO circuit that shuts off the output when it is below the input supply voltage.

The MP4559DN-LF-Z is an excellent choice for those who need a high performance, efficient DC-DC switching regulator with a wide input and output voltage range. It is designed to offer superior load, line and transient response with adjustable switching frequency for optimized efficiency and EMI performance.

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