Features 1-Wire Dynamically Programmable Output Voltages Design Note 459Andy Bishop02/09/459Figure 1. LTC3569 Con gured As Dual 1.2A Programmable Buck RegulatorsIntroductionThe LTC3569 is a compact power solution for handheld devices. Its tiny 3mm 3mm QFN package includes three buck regulators with individually programmable output voltages. One regulator supports load currents up to 1200mA, while the other two support currents to 600mA. Two regulators can be paralleled for increased load capability. Each current-mode regulator is internally compensated with excellent load and line regulation. A complete 2- or 3-output solution requires a minimum number of external passive components.Three Individually Programmable BucksThe LTC3569s three output voltages are independently programmed by simply toggling their respective enable pins. Each time an enable pin sees a falling edge, a 4-bit from the last rising edge at the enable pins, the counter state is latched into the feedback reference vo Triple Buck Regulator Features 1-Wire Dynamically Design Note