A substanTIal percentage of regulator requirements
involve stepping down the primary voltage. Although
linear regulators can do this, they cannot achieve the
effi ciency of switching based approaches1. The theory
supporTIng step-down (“buck”) switching regulaTIon is
well established, and has been exploited for some TIme.
Convenient, easily applied ICs allowing implementation
of practical circuits are, however, relatively new.
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