LM51772: LM51772 output abnormal

Part Number: LM51772

Tool/software:

Hi,

I was able to enable LM51772 and tested with good performance. However, I made another PCB with same schematic design but encountered the issue that the output is abnormal (5V output as captured below). And it can't be tuned higher even if I config correct I2C command. 

Would you please help to review if I missed anything in the attached schematic or if anything I can try?

Thank you very much. 

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Best Regards, 

Max