AMS1117-3.3 in AMS1117 LDO Family
The AMS1117-3.3 is a popular low-dropout (LDO) linear voltage regulator sub-family specifically designed to provide a fixed 3.3V output from higher DC input voltages. Manufactured by various companies including Advanced Monolithic Systems, Slkormicro, and EVVO, this component is ubiquitous in the electronics industry due to its reliability and low cost. It is engineered to handle up to 1A of output current, making it a standard choice for powering microcontrollers and modern digital logic circuits from 5V rails.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | PSRR | Voltage - Input (Max) | Voltage Dropout (Max) | Stock |
|---|---|---|---|---|
| AMS1117-3.3 SOT-223 (Shenzhen Slkormicro Semicon Co., Ltd.) | 120Hz | 18V | 1.4V | 24,248 |
| AMS1117-3.3 (EVVO) | 120Hz | 12V | 1.3V | 6,325 |
Variants within the AMS1117-3.3 sub-family are distinguished primarily by their packaging and manufacturer-specific tolerances. While the SOT-223 is the most common for balanced thermal and spatial performance, TO-252 variants offer better heat dissipation for high-current applications. Some manufacturers provide tighter output voltage accuracy (e.g., 1% vs 2%) or extended temperature ranges for industrial environments. Always verify the specific manufacturer's datasheet for exact pinout and ESR requirements for output capacitors.
