Need IC part number 16VDC->12VDC

[NP01]

Ooh the LM340T. I think I worked on a little piece of that one when I was at National Semiconductor. Fond memories. 

[DigitalGriffin]

Thanks gentlemen.  Found almost instantly what I was looking for @ mouser after I got a part #

Much appreciated as always!

-Don

 

[richg1998]

DigitalGriffin

For the bloody life of me I can't find the part.  I've looked 2 hours.

I want an inline package IC in: 16VDC to out: 12VDC.  I want to power some low power accessories from my MRC AC terminals (18VAC->Full bridge recitifer->voltage converter) 

I know they exist and are cheap, but I can't find the darn things.

 

Knowing how to ask the question can be the most difficult part of a Google search. voltage regulator 12 vdc would have been a good way to start a search. Then just download the PDF and check the specs.

I use the LM317 with two resistors and the two capacitors for different voltages, along with a heat sink.

Rich

[rrinker]

 Or an LM7812. Lower power than the 340, but still capable of an amp if a heat sink is added.

            --Randy

 

[cacole]

What you need is a simple 12 Volt regulator.  All Electronics has a LM340T-12 priced at 50 cents each.  You may also be able to find these at any electronics supply house except Radio Shack.  All the local RS stores have stopped selling any components.

Circuits utilizing regulators are available on the internet, and consist of nothing more than a capacitor on the input and a capacitor on the output.

Here's a link to the National Semiconductor tech sheet for a LM340 series regulator, including circuit details.

https://www.national.com/ds/LM/LM340.pdf 

[DigitalGriffin]

For the bloody life of me I can't find the part.  I've looked 2 hours.

I want an inline package IC in: 16VDC to out: 12VDC.  I want to power some low power accessories from my MRC AC terminals (18VAC->Full bridge recitifer->voltage converter) 

I know they exist and are cheap, but I can't find the darn things.