The LM7809 is a 3-terminal positive fixed linear voltage regulator that delivers a steady +9V output.
| • Output Voltage | +9V fixed (tolerance typically ±2% to ±4%) |
| • Input Voltage Range | 11V to 35V DC (recommended minimum is ~11V–11.5V to maintain regulation) |
| • Output Current | 1A to 1.5A (up to ~2.2A peak, depending on heat sinking) |
| • Dropout Voltage | ~2V (requires an input voltage at least ~2V higher than the desired 9V output) |
| • Quiescent Current | 8 mA |
| • Operating Junction Temperature | -40°C to +125°C (or -20°C to +80°C depending on manufacturer grade) |
| • Package Type | TO-220 (through-hole) |