WEBENCH® Tools/LM25085: Buck converter LM25085 is not working when connect load

Hi Chirag ,

We have requested concerned expertise to look into your query.

The snapshots you have shared are not uploaded properly. Can you upload it again.

Regards,

Atul

Hi,

Could you please upload all layers layout? Thanks.

Namaskar Iven,

Kindly find attached images for your reference. i hope its very help to you for resolving the issue. 

1) Top Layer 

Inner Layer-1 ( GND) :

Inner Layer-2 : 

Inner Layer-3 :

Inner Layer-4 

Bottom Layer : 

Regards,

Chirag Rana

Hi,

It looks the PGATE path is too narrow, gate driver current is going through it, could you please replace it with a short wire and test it again?

Hi Iven,

Thanks for support.

OK, I will check and let you know about this.

Best Regards,

Chirag Rana

Hi Iven,

Thanks for support,

I have check as gave your suggestion but still issue is not resolved.

If you have any other suggestions resolving this issue, kindly suggest to us.

Best Regards,

Chirag Rana

Hi,

Could you please check if the input source is current limited? What's the heaviest load it can deliver?

Hi,

We has used for testing input source supply is 2A maximum.

Regards,

Chirag Rana

Hi,

What's the heaviest load the circuit can deliver? Could you please probe switching voltage and inductor current waveforms under normal and abnormal conditions? Thanks.