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LM66100: 两路电源供电,若一路电源悬空的情况下,CE端可否下拉电阻以防悬空?

Part Number: LM66100

两路电源供电,但实际工作的时候可能只有一路电源有输入,另一路电源是没有输入的,为了使CE端不悬空,下拉的一个电阻,帮忙看下下面两个电路图设计是否合理?