Power Supply Design Strategy, From Morgan Jones

[GeorgeF]

Originally Posted by NickG

Remember though under about 1mv, noise starts to become as important as ripple, thats why I say that ripple isn't everything, and also you have to consider how the supply behaves under dynamic load, thats my I thought the 800R resistor was a shame.

Thanks Nick--1mv is a useful benchmark.

The 800R resistor is a shame because it causes voltage fluctuations with changing current? Or is there another reason.

Thanks!

[NickG]

The 800R resistor is a shame because it causes voltage fluctuations with changing current

Yes, maybe in this case its there for a reason, but normally a low supply inductance is a good thing for a power supply, so the dynamic load of the signal doesn't alter the supply voltage.