There is a fixed output voltage option of 3.3V or 5V on one of the channels. The LTC3892/-1 have very low dropout voltage due to their 99% duty cycle capability, a useful feature that maintains output voltage regulation when being powered from a battery source while it is discharging. They operate with a selectable fixed frequency between 50kHz and 900kHz and can be synchronized to an external clock from 75kHz to 850kHz. The user can select from continuous operation, pulse-skipping and low ripple Burst Mode® operation during light loads. The LTC3892 differs from the LTC3892-1 by having adjustable current limit, a fixed output voltage option and two power good signals. The LTC3892 is available in a 5mm X 5mm QFN-32, whereas the LTC3892-1 is available in a TSSOP-28 package.