MPQ8634B bias voltage

Hello Avi,
To answer your questions:

  1. An inductor will behave as a short in DC. Although it is possible to apply 3.3V at the SW node via L2 I would not recommend as it is outside the operating parameters of the part and could damage internal circuitry.
  2. If the High Side Gate is turned on, the power flow will enter the SW pin and be connected to the IN pin. See block diagram below.