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2MHz SEPIC boost inverter uses 4A, 60V power switch

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By Nick Flaherty

The LT8364 operates from an input voltage range of 2.8V to 60V, and is suitable for applications with input sources ranging from a single-cell Li-Ion battery to multicell battery stacks, automotive inputs, telecom power supplies and industrial power rails.

The device can be configured as either a boost, SEPIC or an inverting converter and the switching frequency can be programmed between 300kHz and 2MHz, enabling designers to minimise external component sizes and avoid critical frequency bands such as AM radio. The efficiency is over 90% when switching at 2MHz. THe Burst Mode operation reduces quiescent current to 9μA while keeping output ripple below 15mVp-p. The combination of a small 4mm x 3mm DFN or high voltage MSOP-16E package and tiny externals ensures a highly compact footprint while
minimising solution cost.

The 100mΩ power switch delivers efficiencies of over 95%. It also offers spread spectrum frequency modulation to minimise EMI concerns. A single feedback pin sets the output voltage whether the output is positive or negative, minimising pin count. Other features include external synchronization, programmable UVLO, frequency foldback and programmable soft-start.

The LT8364EDE is available in a 4mm x 3mm DFN-12 package and the T8364EMSE is available in a high voltage MSOP-16E (4 pins removed for high voltage spacing). Industrial temperature (̶ 40°C to 125°C) versions (LT8364IDE and LT8364IMSE), and high temperature (̶ 40°C to 150°C) versions (LT8364HDE and LT8364HMSE) are also available. All versions are available from stock.

www.linear.com/product/LT8364


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