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What is wrong with this simple design using ADP2302ARDZ-5.0?

Question asked by staticboards on Jan 20, 2016
Latest reply on Jan 29, 2016 by staticboards

Hello,

 

I designed a very simple DCDC converter, from 12v to 5V, using the ADP2302ARDZ-5.0 and the reference design. I assembled it, but it is not working. Voltage in FB is 0.

 

sche.jpg

I am using this inductor, the SRR1240-6R8M

 

This is the top copper plane (bottom copper is a gnd plane)

 

top.jpg

 

This is the complete design:

 

pcb.jpg

 

May I ask you for some help on this? Maybe I am missing something, values, or something. I am using all values from the datasheet...

 

Thank you very much for your time!!

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