Overview and Features
   78L XX It is a low current voltage-stabilized bipolar integrated circuit with a fixed output voltage.
   The main features of this circuit are as follows:
   Maximum output current 0.30A
   Output voltages include 5V, 6V, 7V, 7.5V, 8V, 9V, 12V, 15V, 18V, 24V, etc.
   Built-in overheat protection circuit
   Built-in overload limit circuit
   Built-in output short circuit protection
   Package: SOT-89, TO-92, etc.