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TPS65185 / INT defective waveform

3240.TPS65815 INT PIN defective.pdf

Hi.

Please tell me about the waveform of TPS65185C that the attached.

 Where INT(2pin) should not fall to Low, it is a Low.

 PG Pin goes low and maintain Low, INT Pin goes high again after it goes Low for a moment.

 I'm looking for a reason but I have not found reason why INT returns to HIGH again.

Is there a reason you can figure?

This phenomenon was found in 5 pre-production board of 6 board.

Best regards,

Yusuke