MPQ4323C 24V to 12V generation issue

Hello, MPS team,

We are using MPQ4323C to generate 12V from 24V power supply.

Issue description: During bench testing with a regulated DC power supply, the device failed when the input voltage was increased to 30 V DC. After the failure, a short circuit was measured between the pin SW and ground.

Could you please review the attached schematic and advise?

please let me know if you need any further information.

Thank you in advance.