Hi Rock,
Please download LM25011 Calculator for circuit design, Fsw=130KHz is OK and set Max load current to 1A~1.2A.
https://www.ti.com/tool/LM25011QUICK-CALC
B R
Andy
Hi Liu,
Please check the injected ripple amplitude at the FB pin. I recommend filling out the LM25011 quickstart calculator available here:
http://www.ti.com/tool/lm25011quick-calc
Regards,
Tim