New answers tagged variable
2
votes
Designing a variable negative output voltage converter with low ripple
The other answers are explaining the issues you are having with noise, notably that the output of your converter has discontinuous current.
You should instead use a Cuk converter -- it inverts, can ...
- 850
1
vote
Accepted
Designing a variable negative output voltage converter with low ripple
Post-regulation with a linear regulator is common practice, for the reasons you have discovered for yourself. It's not as simple as throwing on an LDO regulator, though, because they are typically bad ...
- 47.1k
2
votes
Designing a variable negative output voltage converter with low ripple
The output current of this switcher is the inductor current when the bottom FET is on, and zero when the bottom FET is off. So, output current will look like a rectangle wave with sloped tops. To ...
- 81.8k
2
votes
Designing a variable negative output voltage converter with low ripple
is my approach correct?
Yes, as long as the LDO has enough ripple rejection at the frequencies of interest - 1MHz and harmonics.
if there is a better way of doing this?
You can increase the ...
Top 50 recent answers are included