AMS1117-3.3 Low Dropout Voltage Regulator
1A Low Dropout positive fixed 3.3V voltage regulator in surface-mount SOT-223 package with thermal overload and short-circuit current limiting.
Aliase:AMS1117, 1117-3.3, 3.3V LDO, SOT-223 LDO
SOT-223 Package (Top View)
4 Pins
Pinout Table4
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | GND / ADJ | Ground | Ground Reference (0V) |
| 2 | VOUT | Power | Regulated +3.3V Output Voltage |
| 3 | VIN | Power | Unregulated Input Voltage (max 15V) |
| 4 | TAB (VOUT) | Power | Heat Tab — electrically connected to VOUT (Pin 2); solder to PCB copper pour for thermal dissipation |