L78L05ABUTR STMicroelectronics 5V Linear Voltage Regulator (SOT-89-3)

Not every 5V regulation job needs the full 1.5A a TO-220-packaged 7805 can deliver, and this SOT-89-3 part is built for exactly that lighter-duty case - a sensor board, a small logic circuit, anything drawing a modest current where a surface-mount footprint saves real board space over a through-hole TO-220 part that also needs clearance for a heatsink. It still regulates down to a clean 5V from an input up to 30V, just scaled to a lower current rating that matches the smaller package's thermal limits. The right choice when a design is laying out a compact PCB and doesn't want a bulky regulator dominating the board.