15V_AT_1A_WITH_LOGIC_SHUTDOWN

Published:2009/7/19 21:43:00 Author:Jessie | From:SeekIC

Arrangement shown provides practical method d shutting down LM340T-15 or similar regulator under control of ff L or DTL gate. Pass transistor Q1 operates as saturated transistor when logic input is high (2.4 V minimum for TTL) and Q2 is turned on. When logic input is low (below 0.4 V for TTL), Q2 andQ1 are off and regulator is in effect shut down.- Linear Applications, Vol.2, National Semiconductor, Santa Clara, CA, 1976, AN.103, p 11.



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