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关于TPS63070输入2v--2.8v之间时候,输出无电压问题!!!

Other Parts Discussed in Thread: TPS63070

您好,使用TPS63040芯片,,,输入电压范围2v-5v,,,,输出7.5v电压。

1、电压输入3v-5v时候,正常输出7.5v。
2、但是输入2V-2.8V时候,TPS63070就没有电压输出了。

麻烦请教下,这是怎么回事,急急急 ,谢谢技术支持了。