This slide shows a comparison of the specifications for the LTC3769, LTC3786, and LTC3784. As can be seen, the LTC3769 advantages over the LTC3786 include a higher input voltage capability, lower quiescent current, and an EXTVcc input voltage capability. The LTC3784 is a single output, 2-phase controller with up to 12-phase capability for higher power applications. The remainder of the specs are identical to the LTC3769, except that the LTC3784 is available in a slightly larger package.