Recom sip3 single output dcdc converter r 78hbxxl series recom r 78hb90 05 this recom dc to dc single output converter is from the r 78hbxx05 series the switching regulator is ideally suited to replace the 1a 78xx linear regulators and is pin compatible the convertor has a high voltage input range and an efficiency of up to 97 meaning that very little energy is wasted as heat so there is no need for any heat sinks with their additional spacetypical applications include telecom