Electronicdesign 29919 Aos 6682 83 Promo
Electronicdesign 29919 Aos 6682 83 Promo
Electronicdesign 29919 Aos 6682 83 Promo
Electronicdesign 29919 Aos 6682 83 Promo
Electronicdesign 29919 Aos 6682 83 Promo

Synchronous DC-DC Buck Regulators Come in Thin, Thermally Enhanced Packages

Dec. 4, 2019
AOS's dc-dc buck regulators incorporate a low-resistance synchronous buck power stage that enables up to 95% efficiency.

Alpha and Omega Semiconductor Ltd. (AOS) recently introduced dc-dc synchronous buck regulators, the AOZ6682CI and the AOZ6683CI. The new devices are both available in a thin, thermally enhanced TSOT23-6 package and deliver 2- and 3-A output current, respectively. According to AOS, they offer high efficiency over the full load range, allowing for greener power conversion for a variety of consumer electronics applications such as LCD TVs, set-top boxes, high-definition Blu-ray disc players, and networking terminals.

The new devices incorporate a low-resistance synchronous buck power stage that enables up to 95% efficiency. Combined with the thermally enhanced package, they achieve 10°C cooler operation at full load compared with similar competing devices, says the company. 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 control scheme and a low quiescent current of 200 µA allows the buck-converter design to achieve efficiencies of 89% at light loads.

“Modern consumer equipment must achieve less than 0.5 W in standby power consumption and this is a tough problem for system designers to solve,” said Kenny Hu, power IC marketing manager at AOS. “The newest 2- and 3-A additions to the EZBuck family simplify this task, offering up to 6% improved efficiency compared with competing devices, thanks to low quiescent current and a proprietary power-saving light-load control scheme.”

Technical Highlights

Device Specification Table

Pricing and Availability

The AOZ6682CI and the AOZ6683CI are immediately available in production quantities with a lead time of 12 weeks. The unit price is US$0.42 for the AOZ6682CI and US$0.52 for the AOZ6683CI in 1000-piece quantities.

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