用手册的参考设计选的值,EN脚是自己选的,现在问题是 输入电压高于5.1V时能正常输出3.8,当输入为5V时输出就只有2.8V左右,请问有办法改善这个问题吗?
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HI
输入输出压差太小,导致duty受限。
你可以参考: https://www.ti.com.cn/cn/lit/an/slva547a/slva547a.pdf
Layout上注意输入电容尽量靠近Vin脚。