The Function for EA on chip TPS62091

情况是这样的,

我读过TPS62091的说明书,关于它的EA引脚的说明是这样的:

Device enable. To enable the device this pin needs to be pulled high. Pulling this pin low disables the device.
This pin has an active pull down resistor of typically 400 kΩ

那么芯片在disable的状态下,会有什么样的行为呢?

A.输出和输入直连

B.关闭输出,输出变为高阻态

C.输出被连接到GND

D.other.

So in English is follow:

What's the function about the EA pin of TPS62091, when It's disabled, which is the the chip output in follows:

A . Connected to input

B.  Close to all, float.

C.  Connected to ground

D. Other,

And thank you very much!!! 

yang li4：

回复 Johnsin Tao:

明白了, SW接的内部的两个MOS, 高边的s极，和低边的d极.  两个场效应管都是阻断的,也就是说只是两个二极管连接到了电源上.非常感谢您