DRV8343-Q1: Behavior When VREF Fault

Hello,

How could DRV8343-Q1 behave when +5 V separately and externally applied to its VREF pin falls or is removed?

By the way, I guess a pin FMA document is prepared for auto-grade (-Q1) parts, but I cannot find it for the DRV8343-Q1. Isn't it available?

Best regards,
Shinichi Yokota