在用示波器观察输出的波形的时候,5v的电压经过近3s之后才升到5v。是电路设计有问题吗?
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下降速度慢是因为你没有带载,电容上存储的电荷只能通过漏电和反馈电阻的方式慢慢放掉,如果你需要快速下电,就最好带载
或者减小反馈电阻的阻值,也可以带假性负载,但是他们的弊端就是功耗大
或者你减小输出电容的容值,下电速度也会快一点