Demonstration circuit 457 features the LTC3727 in a dual output-5V/4A and 12V/3A-low EMI, 2-phase, adjustable, dual switching regulator controller application. Operating the two high side MOSFETs 180 degrees out of phase significantly reduces peak input ripple current; thereby reducing radiated and conducted EMI. External parts count; cost and size are minimized in this design. Both controllers have overcurrent latch-off, which can be externally disabled, as well as internal current foldback for overload situations. A soft latch for overvoltage conditions is also provided. In addition to the two high current outputs, on-chip 7.5V/50mA and 3.3V/25mA linear regulators are also included. In the optional standby mode, these internal regulators are capable of powering external system wake-up circuitry when both high current controllers are shut down. Two light load modes of operation are available: Burst Mode® operation offers highest efficiency, whereas burst disable mode provides low noise, constant frequency operation down to 1% of maximum designed load. The controller can operate at up to 99% duty cycle for very low dropout capability.