Interactive chip reference
LM1117-3.3 SOT-223-4 pinout
LM1117-3.3 4-pin SOT-223-4 pinout. 3.3V fixed LDO regulator, 800mA output (SOT-223)
Pin reference
| Pin | Name | Function | Group |
|---|---|---|---|
| 1 | GND | Ground / ADJ — ground reference for fixed version | ground |
| 2 | VOUT | Regulated +3.3V output | output |
| 3 | VIN | Unregulated input (min Vin = Vout + 1.2V dropout) | power |
| 4 | TAB | Exposed copper tab — shorted to VOUT internally; solder to thermal pad | output |
View the interactive LM1117-3.3 package diagram and labeled pin details on WhichPin.