Hi Given that the parts to build one are fairly easy to get and that we likely have “nutty” EMI requirements. Maybe a small board that drops into a 78xx footprint is the better solution.
Bob > On Dec 4, 2016, at 3:39 PM, Adrian Godwin <artgod...@gmail.com> wrote: > > At Farnell, they're listed under Power Supplies rather than Switching > Regulators (which is a subdivision of Semiconductors). > > It makes sense since one is a board product and the other a chip, but when > the board product is a drop-in replacement for a TO220, less sense! > > > On Sun, Dec 4, 2016 at 7:44 PM, John Ackermann N8UR <j...@febo.com> wrote: > >> And Digikey does stock the Murata part, for about $4.30. Why I couldn't >> find it when searching their site for switching regulators, I don't know. >> >> John >> ---- >> >> >> On 12/04/2016 02:39 PM, John Ackermann N8UR wrote: >> >>> Thanks for that pointer! When I searched Digikey, I wasn't able to find >>> anything that was in the 3-lead TO-220 case. I will definitely check >>> out the Murata units, as I suspect they perform better than this one. >>> >>> John >>> ---- >>> On 12/04/2016 02:01 PM, Adrian Godwin wrote: >>> >>>> Thanks for this. I've seen something similar from Murata : >>>> >>>> http://uk.farnell.com/murata-power-solutions/oki-78sr-5-1-5- >>>> w36-c/converter-dc-dc-1-o-p-7-5w-1-5a/dp/2102101 >>>> >>>> >>>> Since they're a mainstream supplier of inductors they may have managed >>>> better performance - it would be interesting to compare. >>>> >>>> >>>> On Sun, Dec 4, 2016 at 6:50 PM, John Ackermann N8UR <j...@febo.com> >>>> wrote: >>>> >>>> I found a cute little switching regulator that's a drop-in >>>>> replacement for >>>>> an LM7805: http://www.ebay.com/itm/261243604047 >>>>> >>>>> I got a couple to play with, mainly to see how bad the noise would be. >>>>> Here are spectrum analyzer and PN shots comparing a cheap surplus >>>>> OCXO when >>>>> driven by a regular 7805 and by the switching replacement. >>>>> >>>>> The switching frequency is supposed to be 2 MHz but you can see that >>>>> it's >>>>> more like 2.4 MHz. Whether this performance is sufficient for any >>>>> application is up to you. It sure runs a lot cooler than a 7805, >>>>> though! >>>>> >>>>> John >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- time-nuts@febo.com >>>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >>>>> mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>>> >>>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.