LTC Intros LTC3425 Synchronous Boost Converter

Linear Technology Corp. (LTC, Milpitas, CA) announced the LTC3425, a high-efficiency, synchronous boost converter, which incorporates a four-phase switching topology to minimize solution size and to deliver ultra-low output ripple. Operating at frequencies up to 8MHz, the LTC3425's internal switches provide a 5A current limit and can deliver output voltages as high as 5.25V from an input-voltage range of 0.5V to 4.5V, making it suitable for lithium-ion, nickel-metal hydride applications and general-purpose, fixed rail systems.

The LTC3425 can deliver up to 3A of continuous output current from its thermally enhanced 5mm x 5mm QFN package. The LTC3425's four-phase operation reduces peak inductor currents, capacitor ripple current and increases effective switching frequency. This minimizes both inductor and capacitor sizes providing a total solution profile of less than 2mm. The LTC3425 uses internal switches to deliver efficiencies as high as 95%. Either automatic or manual Burst Mode® operation can be enabled to reduce no-load quiescent current to only 12µA.

The LTC3425 is available from stock in a 32-pin, thermally enhanced, QFN package. Pricing starts at $4.38 each in 1,000-piece quantities.