The TPS4022 device uses input-voltage feed-forward topology that maintains a constant power stage gain when the input voltage varies. It also provides for very good response to input voltage transient disturbances. The constant power stage gain of the controller greatly simplifies feedback loop design because loop characteristics remain constant as the input voltage changes, unlike a buck converter without voltage feed-forward topology. For modeling purposes, the gain from the COMP pin to the average voltage at the input of the L-C filter is 8.2 V/V.