On Mon, 20 Apr 1998 12:08:50 -0400, you wrote:

>To heat sink, or not to heat sink, that is the question.
>
>I have a 7805, 220 style case running my PIC board.  I am using a total of
>0.700 amps.  Do I need to heat sink the 220 case/ 5v regulator??????
>(This is a 3.0 amp device!)
>
>Cya-
>                         6500
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>Dave Celsnak                    ___7500
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Yes - even if the input is as lows 7V, you;re burning 1.4W which will
get very hot without a sink. 
If your input is much more than this, I'd look at using a switching
regulator - much more efficient (input current drops as voltage
increases), and won't need a heatsink at this current level.
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