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TPS54428 ss引脚的问题

Other Parts Discussed in Thread: TPS54428

dear All,

  最近在使用TPS54428,碰到一个问题在SS引脚接的电容大小会影响我输出电压,目前SS电容放680PF,输出电压只有1V左右,本来设计是输出3.3V,所以想确认一下这个SS电容的大小是怎么确认,最小值能放到多大,最大值到多少。谢谢!