Were are 1uF -3uF smt electrolytics typically found? Aren't MLCCs better than electrolytics?

 

Here are some sources:
1) 5325 Tantalum SMD in 1 uf to 3 uF (9808 including TH):
https://www.digikey.com/products/en...03b&quantity=&ColumnSort=0&page=1&pageSize=25
2) 2847 Aluminum electrolytic in that range: https://www.digikey.com/products/en...03a&quantity=&ColumnSort=0&page=1&pageSize=25
3) One can often I substitute MLCC, but not always. For example, some voltage regulators need the esr of an electrolytic to work properly (not oscillate).

 

In terms of ESR for same C valued cap -



But MLCCs have a problem, their C = f(V)

https://pdfserv.maximintegrated.com/en/an/AN6014.pdf


Regards, Dana.

 

C vs Voltage Ceramics

Regards, Dana.

 

His questions might be: Where are they used? And why, if ceramics are "better"?

ak

 

C vs Voltage Ceramics

Regards, Dana.

Thanks for this, I had no idea the sag was that pronounced. No wonder capacitor-based timers are so bad.

 

Its peculiar to Ceramics, so film, mylar, teflon, maybe better
choice. T dependence in datasheets a must read.

Or now many processors with onboard osc "trimmed" at production
test a much better timing element. In the couple of % range.

Regards, Dana.