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LM25145: LM25145 layout rewiev

Part Number: LM25145


Tool/software:

Hello members of the staff,

i designed a switching regulator, converting from 24V down to 19V @ 5A and 12V @ 8A , the the circuit is working well and can deliver all its output power with no problems.

I hear a noise, a whistle while the circuit is working, and i was asking myself if this noise, that probably is due to the switching frequency, could be a problem and could shorten the life of the device.

l1243a.pdf

de1243a.zip

can someone have a look at the layout and tell me if there is something wrong? I am pretty scared by that noise...