There are a number of such chips, one particularly nice one is an isolated DC supply 5 volts to 5 volts. TEA1-0505 (Traco), this is rated for 200 ma with an isolation of 1500 volts.? I was somewhat surprised to find these chips (and there are bigger ones that are adjustable and at more current, no TO-220 form factor, though).
Harvey
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On 10/11/2023 3:15 PM, warrens@... wrote:
Re the L78M05CDT you could also try a Traco Power TSR 2-2450.
This is a switchmode drop in replacement for LM7805 with a 2mA idle current, rated for 2A. It does not need heatsinking. I've used them when repairing the power supply in multimeters which have closed cases and no active cooling (Fluke 8000 series bench meters).
Warren
