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TPS62913-IBB-EVM: 关于纹波的疑问

Part Number: TPS62913-IBB-EVM
Other Parts Discussed in Thread: TPS62913

《TPS62913 Inverting Buck Boost EVM User Guide》中关于纹波的描述如下图所示:

从第二级LC滤波的波形看,依然有将近5mV的纹波,请问这是不是和正相设计相比,差了很多