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TPS60400输出电容的问题

Other Parts Discussed in Thread: TPS60400

TPS60400按照芯片手册使用3个1uf的电容就可以,但是输出的-5V纹波较大,Co电容是否可以选用其他的容量,比如22UF以减少文波,其实在设计中虽然Co为1uf但是后级电路也会有电容的,会影响使用寿命吗。