Systems and methods of regulating a power supply may involve ramping an output voltage of the power supply toward an operating voltage level at a first slew rate in response to detecting a soft start condition of the power supply. A determination can be made as to whether the output voltage has exceeded an intermediate voltage level and, if so, the output voltage may be ramped toward the operating voltage level at a second slew rate. The first slew rate can be substantially less than the second slew rate in order to prevent an electrostatic discharge pump from activating.