Ceramic caps can be microphonic. Just something to be on the look out.
Not so much with leaded ceramics, but more of a problem with surface mounts.
Tantalums are prone to overvoltage failure. Best to really overspec them
regarding voltage.
Note that some LDOs are not stable with really low ESR bypass. There are
app notes on this. I've stated my preference for p-fet pass devices, or
better yet, shunt regulators. The PNP pass devices will need feedforward
compensation if the ESR is too low.
On 11/27/2011 11:21 PM, Attila Kinali wrote:
On Fri, 25 Nov 2011 22:25:37 -0800
Chris Albertson<albertson.ch...@gmail.com> wrote:
One question: How does one avoid using electrolytic caps if you need
(say) 1,000uF or even 100uF. Those would be some mighty big film
caps.
I think, aluminium electrolytics are meant, as these have a lot of
"wear" and can die.
Hence, you can use tantal or niob electrolytics, which have a dry
eletrolyt.
Or you can use ceramics which are already available at 100uF.
Attila Kinali
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