LTC3124

LTC3124 15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect FEATURES VIN Range: 1.8V to 5.5V, 500mV After Start-Up n Adjustable Output Voltage: 2.5V to 15V n 1.5A Output Current for V = 5V and V IN OUT = 12V n Dual-Phase Control Reduces Output Voltage Ripple n Output Disconnects from Input When Shut Down n Synchronous Rectification: Up to 95% Efficiency n Inrush Current Limit n Up to 3MHz Programmable Switching Frequency Synchronizable to External Clock n Selectable Burst Mode® Operation: 25µA I Q n Output Overvoltage Protection n Internal Soft-Start n <1µA I in Shutdown Q n 16-Lead, Thermally- Enhanced 3mm × 5mm × 0.75mm DFN and TSSOP Packages n DESCRIPTION The LTC®3124 is a dual-phase, synchronous step-up DC/ DC converter with true output disconnect and inrush current limiting capable of providing output voltages up to 15V. Dual-phase operation significantly reduces peak inductor and capacitor ripple currents, minimizing inductor and capacitor size. The 2.5A per phase current limit, along with the ability to program output voltages up to 15V make the LTC3124 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV. The LTC3124 switching frequency can be programmed from 100kHz to 3MHz to optimize applications for highest efficiency or smallest solution footprint. The oscillator can be synchronized to an external clock for noise sensitive applications. Selectable Burst Mode operatio...