Synchronous buck regulators increase efficiency in standby mode
Available in a thermally enhanced TSOT23-6 package, the AOZ6682CI and AOZ6683CI synchronous DC/DC buck regulators achieve up to six per cent higher efficiency in standby mode, claims Alpha and Omega Semiconductor.
The 18V, 2.0 and 3.0A EZBuck AOZ6682CI and AOZ6683CI are both available in an ultra-thin, thermally enhanced TSOT23-6 package and deliver 2.0A and 3.0A output current, respectively. They offer high efficiency over the full load range, allowing greener power conversion for consumer electronics applications such as LCD TVs, set-top boxes, high definition Blu-ray disc players and networking terminals.
The AOZ6682CI and AOZ6683CI have a low resistance synchronous buck power stage that enables up to 95 per cent efficiency. Combined with a thermally enhanced package, the AOZ6682CI and AOZ6683CI achieve 10 degrees C cooler operation at full load compared to similar competing devices, claims Alpha and Omega Semiconductor. Under heavy load conditions, the devices operate in a fixed frequency continuous-conduction mode (CCM). At light loads or in standby mode, the devices employ a proprietary pulse energy mode (PEM) control scheme. This, combined with a low quiescent current of 200 microA, allows the buck converter design to achieve industry-leading efficiencies of 89 per cent at light loads, explains the company.
Modern consumer equipment must achieve less than 0.5W in standby power consumption. Kenny Hu, power IC marketing manager at Alpha and Omega Semiconductor explained: “The newest 2.0 and 3.0A additions to the EZBuck family simplify this task, offering . . .improved efficiency compared to competing devices thanks to low quiescent current and a proprietary power-saving light load control scheme.”
The AOZ6682CI and the AOZ6683CI are immediately available in production quantities with a lead time of 12 weeks.
Alpha and Omega Semiconductor designs, develops and supplies a broad range of power semiconductors, including a wide portfolio of power MOSFET, IGBT, IPM, TVS, HVIC, GaN/SiC, power IC and digital power products. The company has developed extensive intellectual property and technical knowledge to introduce innovative products to address the increasingly complex power requirements of advanced electronics. AOS differentiates itself by integrating its discrete and IC semiconductor process technology, product design, and advanced packaging expertise to develop high performance power management solutions.
Alpha and Omega Semiconductor’s portfolio targets high-volume applications, including portable computers, flat panel TVs, LED lighting, smart phones, battery packs, consumer and industrial motor controls and power supplies for TVs, computers, servers and telecommunications equipment.
