The XL2596S-3.3E1 with DC-DC Converters Step-Down Adjustable (Fixed) is a voltage regulator module manufactured by XLSEMI. The device is rated for 1,4.5V, 40V, 1.23V, 37V, and 3A, and is available in TO-263-5 RoHS package. The device features a wide input voltage range, adjustable output, low ripple and high efficiency. It is designed to reduce the voltage from an input of up to 40V down to an output of 1.23V at 3A, with a minimum of ripple voltage. It provides many protections such as over-current protection, over-voltage protection, over-temperature protection, and short-circuit protection. The device is widely used in power supplies, LED drivers, and other applications that require a stable, low voltage output.