我用lm2642做的一个电路,参考手册来的。24V输入,5V和3.3V输出。
可是下管导通,输出一直没有电压。
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不好意思,想不到TI支持这么给力这么快回复。是这样的,下管一直5.6V左右导通,我把下管换成肖特基管后正常输出电压,但是空载纹波很小,带负载就不行了。