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TPS659037 PMIC 3.3V SMPS9 issue

SMPS9(step-down converter)  in the TPS6590379ZWSR provides 1.2V as output, but expected output is 3.3V.

 All the settings in the TPS6590379ZWSR is maintained as default settings.

 What may be the cause of the change in the expected voltage? Also, help me in resolving the issue.