DDR-15L-3.3 is a single-output 15W DC-DC converter made by the Mean Well electronics company. It has a wide 4:1 input voltage range of 9-36VDC, with an adjustable output voltage of 3.3 to 21.6VDC. It has over-voltage, short-circuit, and overload protections, as well as continuous short circuit protection, temperature protection, and remote ON/OFF control. It has a high efficiency of up to 97%, and a built-in SMD type heat sink. The DDR-15L-3.3 is rated for operation at temperatures of -40 to +85?, and is certified with UL/TUV/CB/CE safety approvals.