What is the voltage drop across it?

You have know what the regulator is drooping to get the 5Volts.
Example:  If your input to the 5V regulator is 15V, the you are drooping
10V, at 0.7Amps.
Calculate your power this way and then determine whether you need a heat
sink or not.

> -----Original Message-----
> From: Dave Celsnak [SMTP:x93celsnak@WMICH.EDU]
> Sent: Monday, April 20, 1998 9:09 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: Heat sinks (OT)
>
> 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
>                               7000
> Dave Celsnak                    ___7500
>                                / /     8000     (Shift!)
>                              /-/
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