About LTC4311 operation

Hi,

Let's check the operation of the LTC4311.

When is the LTC4311 current source activated?
I think that the current source operates when the threshold value (VTHR) is exceeded.
Does the current source continue to supply current in the high state after startup?
Does the LTC4311's current source supply 5mA typ. (IPULLUPAC) even if the output current limit of the I2C device is 3mA?
Please answer as soon as possible.

Thank you.