LM34936 Dith function verify

Hi, 

I have a question and when LM34936 workable, I can hear current noise and the Dith pin connector 22nf Cap, if Dith pin connect to GND, this noise disappear.

Check the LM34936 datasheet.  if connect Dith with Cap to Gnd can effectively reduce peak EMI.  does it effect the function or others if Dith pin connect to GND?

ch

Marvellous Liu：

只是晶体频率调制了，则可能的原因是输出纹波变化，纹波并不是有固定频率的，其他应该没影响。