SA1117 is a low dropout three-terminal linear regulator with a drop of 1.2V under 1A output current. SA1117 is divided into two versions, a fixed voltage output version and an adjustable voltage output version. The fixed output voltages are 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V, and the voltage accuracy of the adjustable version is 1%; the output voltage accuracy of the fixed voltage of 1.2V is 2%. SA1117 integrates over-temperature protection and current limiting circuits, and is suitable for various electronic products.
The SA1117 is a positive‑voltage, low‑dropout three‑terminal linear regulator designed for 1 A output current. It is available in fixed‑output versions (1.5 V, 1.8 V, 2.5 V, 2.85 V, 3.0 V, 3.3 V, 5.0 V) and an adjustable version with 1 % voltage accuracy. Integrated over‑temperature and current‑limit circuitry makes it suitable for a wide range of electronic products such as handheld computers, battery chargers, and portable devices.
The datasheet provides electrical characteristics, pin descriptions, typical application circuits, and package dimensions for SOT‑89, SOT‑223, TO‑220, TO‑252, and TO‑263 packages. Key parameters include a 1.2 V dropout at 1 A, operating temperature from –40 °C to 125 °C, and recommended input voltage up to 20 V. This manual is written in Chinese.
| Maximum Output Current | 1 A |
|---|---|
| Dropout Voltage (1 A) | 1.2 V |
| Operating Temperature Range | -40 °C to 125 °C |
| Input Voltage Range | Up to 20 V (typical 15 V) |
| Fixed Output Voltages | 1.5 V, 1.8 V, 2.5 V, 2.85 V, 3.0 V, 3.3 V, 5.0 V |
| Adjustable Output Voltage Accuracy | ±1 % (±2 % for 1.2 V version) |
| Protection Features | Over‑temperature shutdown and current limit |
The dropout voltage is 1.2 V when delivering 1 A.
It operates from –40 °C to 125 °C.
Pin 2 is the VOUT (output voltage) pin.