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3 Threads found on edaboard.com: Switching Power Supply With 7805
Is there anyone experienced with 7805, which input is supplied by switching power supply ? I use +12 V from regular PC power supply. Just now, it went broken. Is it wrong to use switching PS for 7805 input ?
Analog Circuit Design :: 08-20-2007 14:05 :: JaMe :: Replies: 1 :: Views: 1267
You did not inform what are the currents required. The 7805 will become hot only if the current is high, for low currents a heatsink attached to it could be the solution (and cheapest).
I suggest you to use a LM2976-5.0 switching regulator, with the 18Vdc input and regulating to 5Vdc on the output. You need only as additional (...)
Analog Circuit Design :: 04-18-2006 08:58 :: rkodaira :: Replies: 8 :: Views: 5394
if its only for testing, use the power supply from an old PC
(+ and -12, + and -5)
PC power supplies are switching devices, won't even start with a 30 mA load.
Hobby Circuits and Small Projects Problems :: 04-14-2004 17:35 :: socketz :: Replies: 8 :: Views: 2947