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Buck regulators deliver up to 12A from a single supply

Posted: 11 Dec 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Switching regulator? buck regulator? regulators? Sipex? PowerBlox?

Sipex Corp. has announced the three new additions to its PowerBlox family of high-power synchronous buck switching regulators. The SP7661, SP7662 and SP7663, packaged in a thermally enhanced 7-by-4mm DFN, feature operation from a single supply to an input voltage range of 4.5-22V.

The SP7662 is the highest-power density regulator in its class, the company said, capable of delivering up to 12A at conversion efficiencies greater than 93 percent in less than 7cm? of board space.

The 3A SP7661 and 6A SP7663 options provide designers a common architecture to meet varying load requirements. The PowerBlox regulators have an internal Vcc regulator that makes them suitable for use in single supply system applications with loosely regulated inputs, such as the rectified AC transformers commonly used in industrial systems and the Intermediate Bus Converters (IBC) used in telecom systems. The one percent 0.8V feedback and other features enabling various sequencing configurations make these regulators suitable choices for powering a wide variety of digital processors. Fault protection includes output undervoltage protection (UVP) and output overcurrent protection with hiccup mode to avoid overheating.

"Sipex's PowerBlox synchronous switching regulators are a leading-edge power technology that is easy to use for any system designer. The ultrahigh power density leaves more room to add features, increasing a systems value to the end customer," said Jon Cronk, power management marketing director. "Sipex supports these regulators with the online design tool, PowerBlox Lab, where external components are selected by the expert system for any given requirement. The downloadable simulator allows engineers to quickly verify and document their design to give them confidence that the regulator design will work reliably."

The SP7661, SP7662 and SP7663 are available in 26-pin, RoHS-compliant DFN package compatible with Jedec reflow cycle specifications for Pb-free process.

Pricing is $2.50, $3.95 and $6.95 for the SP7661, SP7663 and SP7662, respectively, in 1,000 quantities.

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