Buck regulator with ultrasonic mode and 5V LDO from Alpha and Omega

Alpha and Omega Semiconductor introduced a new family of application-specific EZBuck regulators. The highly integrated AOZ2295QI-05 has the most compact footprint in the industry to support 5V rails in desktop and laptop computing systems. High-performance, personal computing systems, supporting add-on features, and more USB type-C ports, increase the 5V output current to more than 10A today. In such feature-rich personal computing systems, typical power implementations require either a controller with external discrete power FETs or two low-current converters to achieve the high current required of the 5V rail. This results in increased component count and larger PCB area, increasing system cost. In contrast, AOS’ highly integrated solution includes all the power silicon in a single, thermally enhanced QFN 4mm x 4mm package for 12A, providing a compact solution size with industrial-leading efficiency and thermal performance. Technical Highlights • The AOZ2295QI-05 converter includes features specifically designed to meet key requirements of the 5V rail. The AOZ2295QI-05 is designed with a T ON extension mode so the converter can still output stable 5V while the battery cell voltage drops to 5.5V. • In many practical design and application environments, there is also a high possibility of having audible noise when system 5V goes to light load with less than 20kHz swi...