Switching regulator modules offer more output options and improved thermal performance

Using the new R-78Kxx dc-dc converters from RECOM, design engineers can realize point-of-load power supply designs that require no heat-sink. The R-78Kxx modules provide a simple replacement for standard three-pin 78 linear regulators.

RECOM has launched an upgraded version of its popular R-78 series of non-isolated switching regulator modules. The new R-78Kxx series provides an efficient replacement for three-terminal, TO-220-style linear regulators, enabling manufacturers to save energy, board space, and cost by eliminating the need for heat-sinks. 

The new R-78Kxx dc-dc converters offer various improved specifications, including a wider range of fixed-voltage outputs: new 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 6.5 V options, as well as the previous 3.3 V, 5 V, 9 V, 12 V, and 15 V outputs. The input-voltage range has also been extended to a maximum of 36 V. Designers can choose output-current ratings of 0.5 A, 1 A, or 2 A. 

Peak efficiency across the range has increased to 96%, allowing all parts to operate at an ambient temperature of 90°C, many with no derating.

All R-78Kxx series modules can meet the requirements of the EN 55032 Class B EMC specifications with a simple input filter. 

The 0.5 A- and 1 A-rated versions are supplied in a miniature SIP-3 package which has a footprint of 11.5 mm x 7.55 mm and a height of 10.2 mm. The 2 A version’s SIP-3 package has a 11.5 mm x 8.5 mm footprint and is 17.5 mm high. All versions are pin-compatible with standard 78 regulator footprints.

The devices offer a very long mean time before failure of around 5 million hours according to Mil Std HDBK 217F. The parts also withstand shock of 2 g, and are vibration-tested.

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