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What happens if 3.3V is asserted on Vout of LMV3671 without Vin input?

Other Parts Discussed in Thread: LM3671

Hello,

Our customer make a 3.3V circuit with LMV3671.

There is no issue when normal operating.

But customer sometimes need to debug her system, and when she connect her debug system to this board, 3.3V is asserted on Vout of LMV3671.

At that time, there is no Vin input but En pin pulled high. 

Customer wants to know if LMV3671 has protection circuit for this or not?

When voltage asserted Vout, LMV3671 can be damaged?

Please let me get your answer ASAP.

Regards,

Nicky