At 20:32 11/12/2001 +0800, Kathy Quinlan wrote: >I disagree with your comment, to me a linear device working in a linear >region has to dissipate the power not consumed by the load ie > >If I have 24 volts in, 5volt out to the load, load consumes say 1 amp. > >Power into regulator is 24W, power out is 5W, so the regulator must consume >the missing 19W. Of course :) Just one comment to add: the device doesn't have to work in a linear region for this to be true. Ah, yes: the difference between current in and current out has to do with the power consumption of the device (which is probably what Mike confused with the dissipation under load). ge -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu