DRV8876: IPROPI pin question

Part Number:DRV8876

Hi team,

  My customer has a question regarding to pin IPROPI. If the resistor opens, what's the maximum voltage does IPROPI pin will hit, since it's a current source inside and huge impedance outside? 

  I also noticed page 4 of datasheet mentioning 2 maximum pin voltage: 1) 5.75V; 2) VM+0.3V; I wonder what condition are the two data referring to? 

  Thanks.

Regards,

Patrick