Linear Technology Corporation has released a dual-phase, 3MHz, current-mode, synchronous boost DC/DC converter with output disconnect and inrush current limiting. Dual-phase operation significantly reduces peak inductor and capacitor ripple currents, while delivering lower output ripple versus an equivalent single-phase device.
The LTC3124’s internal 2.5A per phase capable switches together deliver 5A of switch current. These 18V switches can provide output voltages as high as 15V from an input voltage range of 1.8V at start-up (0.5V when running) to 5.5V, making it ideal for supercapacitor-based backup power systems and Li-Ion/Polymer or multicell NiMH applications.
This device delivers up to 1.5A of continuous output current at 12V from a 5V input. Synchronous rectification enables efficiencies up to 95%, while Burst Mode operation lowers quiescent current to only 25µA, providing extended battery run time. Its thermally enhanced package and a constant switching frequency of up to 3MHz, are ideal for handheld applications.
