8.4.4 Normal Operation State

In this state the hot swap is fully on and the operation is set as follows:

• The SS pin is disconnected from the GATE pin to improve transient response.
• The full gate sourcing current is used to improve transient response.
• The current limit and fast trip threshold are a function of the D pin to optimize the transient response while protecting the MOSFET.

If any of the following occur, the controller will be kicked back to the OFF state:

• PG_degl goes low.
• The timer times out due to over-current.
• VCC is below its UVLO threshold and the IC doesn’t have enough power to operate properly.

Note that if the input voltage is outside the valid range or the fast trip is triggered, the hot swap FET will turn off, but the controller will not exit the Normal Operation state. In this case the PG signal would go low immediately. If this condition persists, the PG_degl will go low as well and the controller would move to the OFF state. This operation prevents the controller from re-starting the system during quick transients.