LTC3124 Datasheet | Linear Technology

LTC3124 15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect Features VIN Range: 1.8V to 5.5V, 500m V After Start-Up n Adjustable Output Voltage: 2.5V to 15V n1.5A 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 n16-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 500m V. The LTC3124 switching frequency can be programmed from 100k Hz 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 operation reduces quiescent current to 25µA, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up. Other Features include a <1µA shutdown current and robust protection under short-circuit, thermal overload, and output overvoltage conditions. The LTC3124 is offered in both 16-lead DFN and thermally-enhanced TSSOP packages. APPLICATIONS RF, Microwave Power Amplifiers Piezo Actuators n Small DC Motors, Thermal Printers n12V Analog Rail...