Exar – XR79120: Industry’s Smallest 20A Power Module

The XR79120 provides an easy to use, fully integrated power converter integrating MOSFETs, inductors, and internal input and output capacitors. A wide 4.5V to 22V input voltage range allows for single supply operation from industry standard 5V, 12V, and 19.6V rails. With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR79120 provides extremely fast line and load transient response using ceramic output capacitors. It requires no loop compensation hence simplifying circuit implementation and reducing overall component count.

• Fully integrated power supply
• >93% peak efficiency
• Patented emulated current mode COT control
• Precision enable and Power-Good flag
• Programmable soft start
• Programmable current limit with thermal compensation
• 4.5V to 22V VIN operating range
• Selectable CCM or CCM/DCM modes
• 12 x 14 x 4mm QFN package
• 1k MSRP: $13.95 US