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TPS61256C输入电压范围

请问,

1、这个DCDC的输入电压在4.85V~5.3V,输出在boost mode下是5V吗?因为我看手册里写的建议范围是2.3~4.85V

2、手册里要求EN拉高才能进入boost mode,不能悬空,但是实例application里EN是悬空的,究竟是拉高还是悬空呢?我直接把EN与Vin接在一起可以吗?