Tracopower tsr series 1w dc dc converters single output tracopower tsr 1 2425 the tracopower 1w dc dc converter vin 475 32vdc to vout 25vdc 1a is a tsr 1 series step down switching regulator that acts as a drop in replacement for inefficient 78xx linear regulators a high efficiency up to 96 allows full load operation up to 60degc ambient temperature without the need of any heat sink or forced cooling the tsr 1 switching regulator provides other significant features over linear reg