jelly bean Switching Regulator Alternative to 7805

[RoadRunner]

i am looking for a low cost very easily available,(most of the places ) 5V switching regulator  for an open source project so that every one can easily found the part.

please help my by suggesting few part numbers.

[dr.diesel]

You don't list your country, but the OKI-78SR Series are easily available in the US, probably everywhere.

[poorchava]

MC34063. Can't get more jellybean than that

[RoadRunner]

its not about my country, i want to use most generic part so that any body who is trying to build the hardware have easy access to the parts.

[fcb]

MC34063. Can't get more jellybean than that

+1

[jeremy]

I use these in basically everything: http://www.ebay.com.au/itm/DC-DC-LM2596-Step-Down-Module-Adjustable-Converter-Power-Supply-Output-1-3-35V-/400595983355?pt=AU_B_I_Electrical_Test_Equipment&hash=item5d45619bfb&_uhb=1

[BravoV]

its not about my country, i want to use most generic part so that any body who is trying to build the hardware have easy access to the parts.

+1 for MC34063, if you're aiming to ease the circuit builder and still they can't source this chip easily, then I don't think they can easily complete the build, that MC34063 is like the 7805 ic of the switching IC big families.

[dr.diesel]

When you say alternative to the 7805, I think pin compatible?  Is that what you're looking for?

[RoadRunner]

alternative to 7805 means , a 5V switching regulator as common and widely available as 7805 is , pin compatibility is not the issue.

[arcom]

Well, LM2595/LM2596 are pretty common nowdays and are easy to work with.

[fcb]

Well, LM2595/LM2596 are pretty common nowdays and are easy to work with.

Agree.

But the LM2595 is a $2 part and the 34063 is $0.2 - depends on how much current the OP wants.

[mariush]

MC34063 is cheap, but I would avoid it simply because it doesn't have as many protections as newer switching regulators on the market, and it's also kind of low frequency which means you need to use larger inductors so it takes a bit of space on the board.

LM25** are available everywhere and are easy to use but these are also 60-100 kHz.

I would probably investigate a chip like TPS54233 when I need something a switching regulator design.. smaller inductor, ceramic capacitors, up to 2 a, 85%+ efficiency, available everywhere, cheap in quantity (less than 0.67$ when buying 100):

http://www.digikey.com/product-detail/en/TPS54233DR/296-23902-1-ND/1967871
http://uk.farnell.com/texas-instruments/tps54233d/ic-step-dn-swift-conv-2a-8-soic/dp/1755639

Datasheet here: http://www.ti.com/lit/ds/symlink/tps54233.pdf   (also has link to software you can use to calculate the extra components required)