MCT8316Z: Issue with buck converter

Hi TI Team,

I've recently created a custom board basing on the MCT8316Z as a gate driver, I've come to an issue with the buck converter. I'm supplying the nSLEEP pin with a 5V input. I'm getting a clear 3.3V give or take a little as my AVDD output, but, my buck converter which components are scaled down to 3.3V output is giving me the full supply voltage of 26V.

Is there something wrong with my layout/component sizing that this is happening or this might be a chip issue and I should replace it with a new one?

Regards,

Patryk.