The LM7805 is a fixed positive 5V linear voltage regulator from the classic 78xx series. It provides a stable 5V output with up to 1A current, built-in thermal shutdown, and current limiting protection. Widely used to power 5V circuits from higher voltage supplies.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | INPUT | Unregulated DC input, 7V to 35V | PWR |
| 2 | GND | Ground / common | GND |
| 3 | OUTPUT | Regulated +5V output | PWR |