Formula for RC delay time
The standard formula for charging a capacitor via a resistor is this: -

$$V_C = V_S(1-e^{\frac{-t}{RC}})$$

Where \$V_C\$ is the voltage on the capacitor,

and \$V_S\$ is the supply voltage (5 volts in your circuit example).

So, rearranging you get: -

$$t = -RC\cdot \ln(1 - \frac{V_C}{V_S})$$

So the delay time is how long it takes the capacitor voltage to reach 1.2 volts (the enable threshold nominal value it appears to be) when supplied from a 5 volt input voltage. This dictates how long it takes the 3.3 volt rail on the G571195T (unknown to me and a bit of a guess) to activate.