Switch.buck voltage regulator recommends?

Jonathan

Hi All,

I'm looking to replace some TO-220 package voltage regulators, like the LM2940 or· LM7805 and so on. I live off the grid now and every watt counts.·I'd like to stick with a drop in replacement so that I can easily retrofit some of my exsisting projects. I need outputs of 3.3V and 5V. I'd also like an adjustable like a LM317. Input will be 20 to 12V, as I am running most of these project from my battery bank.

So, any recommendations? There are so many out there, and folks here usually have real experience.

Thanks!

Jonathan

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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot

TonyWaite

Hi Jonathan,

www.dimensionengineering.com have some brilliant drop-in products that would do
the job!

Regards,

T o n y

Jonathan

Those look real nice, but the price... Ouch. I was hoping for something in the US$5 range. I'll do $15 for some projects, but it would be expensive to replace all of my linear regs.

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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot

Leon

Just buy a Nat Semi Simple Switcher chip, make a PCB, and build your own. It shouldn't cost more than $5.

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Leon Heller
Amateur radio callsign: G1HSM