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.

LM25085工作异常,电感啸叫

Other Parts Discussed in Thread: LM25085

VIN=7.5V,设置Vout=4.36V,Iout=300mA,

发现LM25085工作异常。电感啸叫,量取PGATE和Vout波形如下图,PGATE每隔一段时间就会周期性关闭,导致Vout纹波(VPP=233mV,f=10.5K)很大...

展开之后如下图

电路原理图图下,Power stage 元件参数也应该是符合datasheet给出的公式