Published:2009/7/14 3:24:00 Author:May | From:SeekIC
Uses 18-V zener in series with 3.9K resistor to provide power for LM305 IC regulator. Q2 provides base drive for PIC626 hybrid power switch and isolates output of LM305 from switch.-L. Dixon and R. Patel, Designers' Guide to: Switching Regulators, EDN Magazine, Oct. 20, 1974, p 53-59.
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