Alpha and Omega Semi Expands EZBuck Product Portfolio

Alpha and Omega Semiconductor Ltd. (AOS) announced the release of the AOZ1050 and AOZ1051 high efficiency, simple-to-use synchronous buck regulators. Both AOZ1050 and AOZ1051 are available in a thermally enhanced exposed pad SO-8 package, delivering output current of 2 and 3A, respectively. These new devices are well suited for a variety of consumer electronics applications such as LCD TV, set-top-boxes, DVD players and recorders.

The low on-resistance of internal power MOSFETs in these devices allows higher efficiency and less heat generation. The full load efficiency of AOZ1051 is 7% higher and IC surface temperature is almost 40°C lower than that of the leading competitor. Adjustable soft-start time provides system designers with flexibility for power-up sequencing. Cycle-by-cycle current limiting combined with unique hiccup short-circuit protection ensure reliable operation under any abnormal conditions.

"We continue to expand our EZ Buck product portfolio to provide our customers with higher efficiency and more reliable dc-dc solutions. The AOZ1050 and AOZ1051 are a good example." said Song Qu, Director of Power IC Product Marketing at AOS.

Technical highlights include: an input voltage range of 4.5 to 18V; high-side MOSFET on-resistance of 80mΩ (AOZ1050) and 70mΩ (AOZ1051); low-side MOSFET on-resistance of 50mΩ (AOZ1050) or 40mΩ (AOZ1051); output current of 2A (AOZ1050) and 3A (AOZ1051); and packaged in an exposed pad SO-8.

The AOZ1050 and AOZ1051 are immediately available in production quantities. The unit prices for 1,000 pieces are $0.66 and $0.72, respectively.