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<shevek>
I'm looking for a MOSFET, and I have no idea what is a reasonable power dissipation if I want to mount it without a cooling fin. From R_{DS}(on) and the I_D for my application, I can compute the power (R*I*I), but I don't know what is high and what is low. I now have one that would dissipate 500mW. Is that good or bad? What should I aim for?
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<DocScrutinizer05>
aim for one digit milliOhm Ron
<DocScrutinizer05>
500mW sounds a lot, except for when your app is 2lW or more
<DocScrutinizer05>
without cooling measures you want <<100mW
<DocScrutinizer05>
a proper PCB goundplane is ok for maybe 100 to 250mW
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