: This prevents the IC from being destroyed if a battery is connected with the wrong polarity, a common hazard in automotive repairs. Low Quiescent Current : It consumes only
: Pins used for managing operational modes and signal processing tasks. Primary Applications highway 09 ic datasheet
The headline feature of this IC is its adjustability. Unlike the fixed 7805 or 7812 regulators, the Highway 09/LM317 allows users to set the output voltage precisely where they need it. : This prevents the IC from being destroyed
The IC does have inherent reverse protection. An external Schottky diode (D1 in the schematic) is mandatory for automotive use; otherwise, a simple reverse connection will destroy the IC instantly. highway 09 ic datasheet