The LM317 is an adjustable 3-terminal positive-voltage regulator capable of supplying 1.5A over a differential voltage range of 3V to 40V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Both input and output regulation are better than standard fixed regulators.In addition to higher performance than fixed regulators, these regulators offer full overload protection available only in integrated circuits. Included on the chip are current limit, thermal overload protection, and safe-area protection.
LM317 Datasheet
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