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Junction Capacitance of a Diode

I'm currently designing a buck converter with a MBRA340 diode and the
only problem is that it
has high junction capacitance at 0V (900pF). The junction capacitance
drops significantly pass 5V (<500pF). I wanted your opinion on how
this would effect a buck converter, as the TRR on the diode is still
very fast. I believe this will be a non-issue, as it is a variable
capacitance (depending on Vb), along with the fact that most of the
capacitance will
be spent with Vb greater than 5V. Your feedback on this is greatly
appreciated. Thanks.
 
R

Robert Baer

Jan 1, 1970
0
I'm currently designing a buck converter with a MBRA340 diode and the
only problem is that it
has high junction capacitance at 0V (900pF). The junction capacitance
drops significantly pass 5V (<500pF). I wanted your opinion on how
this would effect a buck converter, as the TRR on the diode is still
very fast. I believe this will be a non-issue, as it is a variable
capacitance (depending on Vb), along with the fact that most of the
capacitance will
be spent with Vb greater than 5V. Your feedback on this is greatly
appreciated. Thanks.
Sounds like that diode may be good for FM work...
 
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