Power IC LTC3115-1

在使用LTC3115-1过程中,PWM/SYNC这个引脚老是烧掉,与地导通,同时输出电压为零。外围电路是根据datasheet上的电路进行设计的,请问是什么原因导致的呢?

In the process of using LTC3115-1, the PWM/SYNC pin is always burned, connecting to ground of the system, and the output voltage is zero. The peripheral circuit is designed according to the circuit on the datasheet. What is the cause?