For those interested in pursuing the "buck-boost" scheme where the input
voltage can be both above and below the target voltage it is also known
as a SEPIC topology.  (Single Ended Primary Inductor Converter).

A relevant artical can be found at --

http://www.powerdesigners.com/InfoWeb/design_center/Appnotes_Archive/dn48.shtm

Bear in mind that Unitrode has recently been sucked up by TI.

	Have more fun, Bob Smith

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Robert L. (Bob) Smith			Smith Machine Works, Inc.
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