The SC2441A is a programmable frequency dual
independent or dual/multiple phase single output peak
current-mode step-down switching regulator controller. It
is capable of operating from 1.8V to 20V input. A 0.6A
step-up converter in the SC2441A generates an auxiliary
gate drive supply when VIN is below 4.5V. This makes the
SC2441A well suited for applications where a low-voltage
input (<3.3V) is to be stepped down for lower voltage logic,
yet the input is too low to drive power MOSFETs
efficiently