Alan8947
Full Member level 4
Thanks guys for the help. The reason I posted this to ask was because my experience on regulators and converters are mostly conditional stable only. They mostly have closed loop feedback to stabilize the output voltage. To every closed loop feedback system, the more the caps you put on the output, the more chance it can be unstable. You cannot even trust the application circuits. We had a body camera that kept giving slanted stripes on the screen, I found the two converter circuits that was designed in oscillated!!! The circuits were exactly given by Linear Technology application notes. They did NOT work. People have a big miss conception that power supply circuit are slow, that you don't have to treat it as a closed loop feedback system, to worry about the poles and zeros. That's the reason most of the SMPS has minimal load require and it will oscillate if you don't draw enough power.
That's the reason I want to confirm if it is ok to put extra caps as the datasheet only gives minimum value. I have not use this kind of regulator for like 30 years, I remember long time ago, I used a 7805, it got really hot even with no load, so I just not using them at all. I thought something wrong with the IC, but thinking back, it must be oscillation that generated so much heat. I have no recollection how I built the circuit, I was very green at the time.
Since everyone said it's ok here, I consider this is solved.
Thanks
That's the reason I want to confirm if it is ok to put extra caps as the datasheet only gives minimum value. I have not use this kind of regulator for like 30 years, I remember long time ago, I used a 7805, it got really hot even with no load, so I just not using them at all. I thought something wrong with the IC, but thinking back, it must be oscillation that generated so much heat. I have no recollection how I built the circuit, I was very green at the time.
Since everyone said it's ok here, I consider this is solved.
Thanks
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