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TPS2051C: About FLT pin (before input to IN pin.)

Part Number: TPS2051C

Hello,

 

Regarding to FLT pin on TPS2051C, my customer is asking a question. 

(Question)

In their application, before 5V is input to IN pin, 1.8V is input to FLT pin while about 80ms.

1.8V (FLT) (80ms) -> 5V(IN)

At that time, Is there any impact for this device? (failure mode)

 

According to datasheet, when UVLO is worked, FLT pin is Hi-z(high impedance).

And voltage range on FLT pin of Absolute Maximum Ratings is 6V(max).

By above conditions, I think that there is not any impact for this device.

But if input current into FLT pin is higher than 5mA, there might be any impact.

Because, sink current into FLT pin is 5mA(max) on recommended operating condition.

My understanding is correct?

 

Regards,

Tao 2199