At 12:18 AM 10/4/2003 +0300, Omer Yalhi wrote:

>What is a switcher?  Voltage regulator?

Switchmode voltage regulator.
There are many types, but for your particular problem, I think a burst mode switcher might be the only efficient answer.
http://www.eetasia.com/ARTICLES/2002APR/2002APR08_ICD_PL_PD_MPR_TAC.PDF

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