TPS92612-Q1: Voltage dropout from IN to OUT

Part Number: TPS92612-Q1

Hi support team.

Is the following idea correct?
"Voltage dropout from IN to OUT" = "Voltage dropout from SUPPLY to OUT" - V(CS_REG)

Are Figure-4 and Figure-5 of datasheet "Voltage dropout from SUPPLY to OUT"?

Regards,
Dice-K