TPS62152-Q1: TPS62152/TPS62152-Q1 series discharge function clarification

Hi 

Greetings, I'm considering to use TPS62152 or TPS62152-Q1 discharge function on the VOUT, but the description in the datasheet confuses me.

Could you kindly help me to clarify the following questions -

1. There's no PG discharge function in TPS62152RGTT, right? That's the reason why I'm looking into TPS62152-Q1(TPS62152QRGTRQ1). 

2. TPS62152-Q1 PG pin is high-impedance "after" EN=Low, UVLO, or thermal shutdown (one of the conditions is met) occurs and turns off TPS62152-Q1,

but before Vin drops to certain threshold voltage, PG pin stays low, is this understanding correct?

3. What is the Vin threshold (for Vin to be present) for PG pin to stay low? 2.7V? Or 0.7V like TPS62150?

4. Current sinking capability of PG pin is 2mA or 10mA? 

Thanks,

Bertram Huang