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LM2743: LM2743 0.5V output noice on 1.2V output

Part Number: LM2743

Hello,

We have designed in a power circuit into our FPGA based device, that uses LM2743 buck controller.
It provide us pretty stable DC current; however, it has a strong noise on the output.
Here is our circuit and noise picture,

Anybody has an idea how to reduce this noise?

Thank you