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TPS73250-EP电压输出问题

Other Parts Discussed in Thread: TPS61241

按照DataSheet中图3设计的电路,输入端和输出端各对地连接一个0.1uF电容,EN脚连接到Vin,R1取值82k,R2取值24k。

问题:输出电压没有起到5V稳压的效果,几乎输入电压是多少输出就是多少,输入为3.7V,输出也是3.7V

请问这是什么原因呢?