20A from 12 x 14 mm power module

June 05, 2015 // By Graham Prophet
XR79120 is a 20A single output, synchronous step-down power module in a 12 x 14 x 4 mm outline, offering greater than 93% peak efficiency. It uses Exar’s constant on-time (COT) control architecture across a 4.5V to 22V input voltage range.

XR79120 is a 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.

The XR79120 occupies a 74-pin (multiple pins are paralleled for power connections) 12 x 14 x 4 mm QFN package. The XR79120 is priced at $13.95 (1,000).

For more information, visit http://www.exar.com/xr79120 or www.exar.com/power-management/power-modules