The ISL8033, ISL8033A includes a pair of low ON-resistance P-Channel and N-Channel internal MOSFETs to maximize efficiency and minimize external component count. 100% duty-cycle operation allows less than 250mV dropout voltage at 3A. The ISL8033, ISL8033A offers an independent 1ms Power-Good (PG) timer at power-up. When shutdown, ISL8033, ISL8033A discharges the output capacitor. Other features include internal digital soft-start, enable for power sequence, controllable soft-stop output discharge during disabled, start-up with pre-biased output, 100% maximum duty cycle for lowest dropout, 100% duty cycle operation for smooth transition, less than 8A logic controlled shutdown current, independent enable, overcurrent protection, and thermal shutdown.