Exar Introduces Industry's Smallest 20A Power Module

FREMONT, CA -- Exar Corporation introduces the XR79120 – a 20A single output, synchronous step-down power module in a compact, market leading 12mm x 14mm x 4mm footprint. Although small, the XR79120 still offers greater than 93% peak efficiency and leverages Exar's patented advanced constant on-time (COT) control architecture across a 4.5V to 22V input voltage range.

The XR79120 provides an easy to use, fully integrated power converter integrating MOSFETs, inductors, and internal input and output capacitors. QFN-based package technology provides superior thermal performance, eases electrical debugging and improves manufacturability with higher assembly yield and the ability to visually inspect solder joints. At 50°C with no airflow, no thermal de-ratings are required for output voltages of 1.8V and below.

"Delivering 20A from a 12V supply in a 12mm x 14mm x 4mm module sets this device apart in the market," said Jon Cronk, Exar's marketing director, power management products. "By optimizing efficiency, size and thermal performance, the XR79120 boasts the best power density available since the big bang."

The XR79120 will be available in a RoHS compliant, green/halogen free, space-saving 74-pin 12mm x 14mm x 4mm QFN package. The XR79120 is priced at $13.95 in 1,000-piece quantities.

Summary of features:
•Fully integrated power supply
•12mm x 14mm x 4mm QFN package
•>93% peak efficiency
•4.5V to 22V VIN operating range
•Patented emulated current mode COT control
•Exceptional line/load regulation

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