5_V_TO_33_V_SWITCHING_REGULATOR

Published:2009/6/26 4:05:00 Author:Jessie | From:SeekIC

A National Semiconductor LM2574 is used to derive 3.3 V at 0.5 A from a 5-V logic bus. The duty cycle is: VD = diode drop (0.39) VIND = inductor dc drop VSAT = saturation voltage of LM2574 (0.9 V typical) This circuit should be useful to derive 3.3 V for logic devices from existing +5-V buses.



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