Electronics > Beginners
Negative version of LP2951 LDO
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schmitt trigger:
If you would like high frequency ripple reduction, LDOs are not the best option. At powerline ripple frequencies they may have easily 45 or 60 db of ripple rejection.
But at higher ripple frequencies, it drops to essentially zero. Some LDO datasheets clearly show this.

In my humble opinion, it would be far better to have a transistor capacitance multiplier for HF ripple reduction.
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