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TPS70930芯片静态功耗大问题



买了几片TPS70930的芯片,用在待机模式下低功耗的场所。现在发现这个芯片的静态耗电流比较大。当EN接电源时,输出负载为零,不加任何负载。输入电流有120uA左右,有点太大了,标称是只有1uA的,不知道为什么这么大。电路很简单就不上图了。EN接VIN,输入一个104电容,输出一个104电容。器件丝印为LK30,和资料上标称的SDF完全不一回事。请用过的人说下呗,是俺被卖家忽悠了,还是怎么地?先行多谢了