Re: standard size for smt tantalums?

There is a very coherent discussion of different capacitor chemistries in
http://focus.ti.com/lit/ml/slup206/slup206.pdf


"Michael Noone" <mnoone.uiuc.edu@xxxxxxxxx> wrote in message
news:Xns9689D14D8452Amnooneuiucedu127001@xxxxxxxxxxxxxxxxx
> John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
> news:0kojc1tvbu83ttbp263s8rqfplq6u5i7s7@xxxxxxx:
>>
>> You can now get a 100 uF 1206 ceramic, but they have rotten tc's and
>> voltage/capacitance coefficients.
>>
>> There are five or six standard surfmount tantalum sizes. DON'T use
>> them for power supply bypasses; they tend to detonate. The new polymer
>> tantalums are OK.
>>
>> John
>>
> So for power supply bypassing I should use polymer tantalums? Or is there
> something better than that? I should mention that size is a bit of a
> constraing here... The smaller the parts I can use the better! I was
> looking on the Digi-Key catalog and found a couple different series' of
> surface mount polymer tantalums:
>
> Kemet: (Digi-Key page 970: http://dkc3.digikey.com/PDF/T052/0970.pdf)
> T520 Series - KO-CAP Polymer Tantalum
> T525 Series - KO-CAP Polymer Tantalum
> T530 Series - KO-MAT Polymer Tantalum
>
> Epcos: (Digi-Key page 976: http://dkc3.digikey.com/PDF/T052/0976.pdf)
> B45294R & B45296R Polymer Ultra-Low ESR Series
> B45496R Polymer Multiple Anode Ultra-Low ESR Series
>
> Do any of these look like good choices for power supply bypass? (or any
> others that I missed - though I looked fairly carefully)
>
> Thanks!
>
> -Michael J. Noone


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Relevant Pages

  • Re: standard size for smt tantalums?
    ... > them for power supply bypasses; ... T520 Series - KO-CAP Polymer Tantalum ... B45496R Polymer Multiple Anode Ultra-Low ESR Series ...
    (sci.electronics.design)
  • Re: standard size for smt tantalums?
    ... >T520 Series - KO-CAP Polymer Tantalum ... >B45496R Polymer Multiple Anode Ultra-Low ESR Series ...
    (sci.electronics.design)