Power Supply Filter Capacitor Size

[Paul Perry]

At 11:45 PM 7/12/99 -0600, Grant Richter wrote:
>
>Regulator power dissipation (read heat) is reduced by matching
>the capacitor to the load. The regulator does not have to dissipate
>the constant excess input voltage and as log as the bottom
>of the "ripple" is above the dropout voltage, it should show the
>power supply ripple rejection the regulator is rated for.
>
.....can this be true?
The dissipation in the regulator is the drop across the regulator,
multiplied by the current through it.
I mean, this is Ohms law in practice.

For a normal three terminal regulator, ther is no such thing as 
matching the capacitor to the load, provided it is big enough, as
pointed out by the earlier posts.

paul perry melbourne australia
>