Alpha and Omega Semiconductor Announces Application-Specific EZBuck Regulator to Power 5V System Rails

Alpha and Omega Semiconductor Limited (AOS) (Nasdaq: AOSL), a designer, developer, and global supplier of a broad range of power discretes, ICs, modules, and digital power solutions, today 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.

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AOZ2295QI-05 with Ultrasonic Mode and 5V LDO Provides Highest Power Density Solution for System 5V Rails (Graphic: Business Wire)

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 switching frequency. AOS’ proprietary Constant On-Time architecture provides an ultrasonic mode to guarantee operating frequency working above 30kHz to prevent audible noise in the full application range.
• The new device also features a high level of integration and protection features of the AOS EZBuck product family; featuring a PGOOD output, an integrated bootstrap diode, and an integrated soft start. Protection features include cycle-by-cycle current limit, short-circuit protection (SCP), Overvoltage Protection (OVP), and Thermal shutdown.

Key Features