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[Moved]: boost converter problem

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Eslam Saad

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i work in boost converter with 130nm technology
i need to use 5V with mosfet 3.3V
and current above 1 A
warning in attachment
And thanks in advance
Screenshot-3.png
 

erikl

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Re: boost converter problem

The 3.3V mosfet isn't appropriate for its 5V input voltage. Seems there is a voltage breakdown of the bulk-drain junction.

You will need a 5V mosfet in this application. Or perhaps you can limit the bulk-drain voltage to max. 3.3V by design provisions.
 
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Eslam Saad

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Re: boost converter problem

So how can i limit it ?
and for melt current same method "bulk-drain voltage" working
 
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