This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
看了你的原理图,可能是环路问题,建议你用WEBENCH优化电路参数,主要是comp管脚的参数
另外,推荐个料给你LMR14020,可以对比下MP4459,外围器件更少