LM317 Current Boosting Secrets

By Hesam Moshiri, Anson BaoLM317 is one of the most popular adjustable regulator chips. The output voltage of the regulator can be adjusted from 1.25V to 35V. However, the chip can deliver currents up to 1.5A which is not enough for some power applications. In this article, I will discuss two methods of LM317 current boosting, using power PNP and NPN pass transistors.[A] Circuit AnalysisAccording to the LM317 datasheet: “The LM317 [1, 2] device is an adjustable three-terminal positive-voltage re...

LM317 Current Boosting Secrets

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3 PsElectroBot 2
4 Andrejs Cainikovs 1
5 Engineer 1
6 Michele Bertoni 1
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