LM317

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SLVS044W – SEPTEMBER 1997 – REVISED OCTOBER 2014

8.4 Device Functional Modes

8.4.1 Normal Operation

The device OUTPUT pin will source current necessary to make OUTPUT pin 1.25 V greater than ADJUST

terminal to provide output regulation.

8.4.2 Operation With Low Input Voltage

drop out and OUTPUT voltage will be INPUT voltage minus drop out voltage.

8.4.3 Operation at Light Loads

The device passes its bias current to the OUTPUT pin. The load or feedback must consume this minimum

current for regulation or the output may be too high.

8.4.4 Operation In Self Protection

When an overload occurs the device will shut down Darlington NPN output stage or reduce the output current to

prevent device damage. The device will automatically reset from the overload. The output may be reduced or

alternate between on and off until the overload is removed.

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