SN6505A and SN6505B devices support soft-start feature. Upon power up or when EN pin transitions from Low to High, the gate drive of the output power-MOSFET is gradually increased over a period of time from 0 V to V_CC. Soft-start prevents high inrush current from V_CC while charging large secondary side decoupling capacitors, and also prevents overshoot in secondary voltage during power-up.