LM25576EVAL

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The LM25576EVAL is a high-performance, cost-efficient evaluation board designed to be used to evaluate the features and performance of the LM25576 dual-channel synchronous buck regulator. The board contains several components necessary for operation including the main regulator IC, input capacitors, output capacitors, and load resistors for each channel. The board includes a pair of trace headers for single-ended input and output connections, as well as a pair of sense terminals.

The LM25576EVAL is primarily designed to be used to evaluate and design-in the LM25576 dual-channel synchronous buck regulator in a variety of applications that need to generate two different output voltages from a single input. It is especially well suited for designs that require a combination of efficiency and small size. The board includes all the required components to power two independent outputs to as much as 30V.

The LM25576 is a dual-channel synchronous buck regulator capable of delivering up to 8A of output current per channel from input sources up to 40V. The first channel has adjustable output voltage, while the second channel can be used as either a regulated or ultra-low noise buck regulator. The device includes two synchronous buck regulators in a single package, each with a dedicated enable pin for control. It also includes separate enable and power-OK signals that allow users to control the output voltage of each channel independently.

The LM25576EVAL board has several components to enhance the performance of the LM25576. It contains two pairs of low-ESR bulk capacitor networks for each output stage to ensure proper filtering of the inputs and output voltage, as well as a pair of current sense resistors. It also includes a thermal shutdown circuit, ESD protection, and thermal protection for the regulator IC.

The working principle of the LM25576EVAL is simple. The board is powered from an external input source (up to 40V) and the output voltages are set to the desired value via two potentiometers. The signal paths of the board are then protected with two pairs of low-ESR bulk capacitors to ensure proper filtering of the inputs and output voltage. The output voltage is then regulated to the desired value by the LM25576regulator IC. The board also includes two dedicated enable pins and power-OK signals that allow users to control the output voltage of each channel independently.

In conclusion, the LM25576EVAL board is a cost effective and versatile evaluation board designed to evaluate and design-in the LM25576 dual-channel synchronous buck regulator. The board contains several components necessary for operation and includes an input range of up to 40V. The board is protected with two pairs of low-ESR bulk capacitors, a thermal shutdown circuit, ESD protection, and thermal protection for the regulator IC. Additionally, the board includes two dedicated enable pins and power-OK signals to control the output voltage of each channel independently.

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