Industry’s smallest 20A power module delivers on many levels

Exar has introduced the XR79120, a new 20A single-output, synchronous step-down power module in a compact, the world's smallest says the company, 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 50C 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 is housed in a RoHS compliant halogen-free space-saving 74-pin 12mm x 14mm x 4mm QFN package.