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<div class="moz-cite-prefix">On 1/7/2013 12:52 PM, Carl Pisaturo
wrote:<br>
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<div>In systems where there is, say, a 24VDC power bus and you
need some regulated 5VDC somewhere, these things are
lifesavers. <a moz-do-not-send="true"
title="http://www.digikey.com/product-detail/en/PT5101N/PT5101N-ND/210844"
href="http://www.digikey.com/product-detail/en/PT5101N/PT5101N-ND/210844">http://www.digikey.com/product-detail/en/PT5101N/PT5101N-ND/210844</a>
$17 seems like a lot for a drop-in replacement for a 7805
voltage regulator, until you realize that the sink/fan/board
real estate/ventilation holes/etc to remove the heat from
the 7805 would cost way more than that. </div>
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<br>
This is better/cheaper for 5V 500mA from 6.5-36V:
<a class="moz-txt-link-freetext" href="http://www.digikey.com/product-detail/en/V7805-500/102-1709-ND/1828602">http://www.digikey.com/product-detail/en/V7805-500/102-1709-ND/1828602</a><br>
<br>
And the big brother for 1000mA:
<a class="moz-txt-link-freetext" href="http://www.digikey.com/product-detail/en/V7805-1000R/102-2178-ND/2352137">http://www.digikey.com/product-detail/en/V7805-1000R/102-2178-ND/2352137</a><br>
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--- Garrett<br>
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