LM7805 is a very common voltage regulator IC from the 78xx series, used to provide a stable +5 V output from a higher voltage DC input. It is not a transistor like the ones you listed earlier, but an integrated voltage regulator.

📌 Key Features

• Type: Linear voltage regulator IC

• Output Voltage (Vout): +5 V

• Input Voltage (Vin): Typically 7 V – 35 V

• Output Current (Iout): Up to 1–1.5 A (with proper heatsinking)

• Dropout Voltage: ~2 V (so Vin must be ≥7 V for stable 5 V output)

• Package: TO‑220 (through‑hole) or SMD variants

• Protection: Built-in thermal shutdown and short-circuit protection