Exar Corp. recently announced the XR79120, a 20-A single output, synchronous step-down power module in a compact, 12 mm x 14 mm x 4 mm footprint. Even though it’s small, the XR79120 offers more than 93% peak efficiency and leverages Exar’s patented advanced constant on-time (COT) control architecture across a 4.5-to-22-V input voltage range. The easy-to-use XR79120 provides a fully integrated power converter integrating MOSFETs, inductors, and internal input and output capacitors. QFN-based package technology provides noteworthy 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 1.8 V and below.
The XR79120 will be available in a RoHS compliant, green/halogen free, space-saving 74-pin 12 mm × 14 mm × 4 mm QFN package. The XR79120 costs $13.95 in 1,000-piece quantities.
The XR79120’s features include:
• Fully integrated power supply
• 12 mm × 14 mm × 4 mm QFN package
• > 93% peak efficiency
• 4.5 to 22 V VIN operating range
• Patented emulated current mode COT control
• Exceptional line/load regulation
Source: Exar Corp.