效率可以不高,因为平时是关闭状态,只是偶尔需要5V供电,芯片最好面积较小
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HI
你期望的截止电压是多大?
因为如果选择封装小的芯片,开关电流都不大,电池电压下降幅度有限。
上述芯片可以在很低的电压都能正常工作。