The STMicroelectronics L78L05ABD13TR is a fixed 5 V positive voltage regulator delivering up to 100 mA in an SOIC-8 package. It is a classic three-terminal linear regulator — no external passives beyond the input/output capacitors — suited for powering low-current 5 V rails on industrial control boards, sensor interfaces, or auxiliary supplies in motor drives and power supplies.
The 100 mA output current sets the hard load limit. PSRR is 49 dB at 120 Hz. Protection features include over-current, over-temperature, and short-circuit shutdown — enough to survive a momentary output short without external foldback circuitry.