LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS **Manufacturer:** STMicroelectronics (ST)  
**Part Number:** LD1117S33TR  
### **Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 800mA  
- **Input Voltage Range:** Up to 15V  
- **Dropout Voltage:** 1.2V (typical at 800mA)  
- **Line Regulation:** 0.2% (typical)  
- **Load Regulation:** 0.4% (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOT-223  
### **Descriptions:**  
The LD1117S33TR is a low-dropout (LDO) linear voltage regulator from STMicroelectronics, designed to provide a fixed 3.3V output. It is suitable for applications requiring stable power supply with low noise and high efficiency.  
### **Features:**  
- **Low Dropout Voltage:** Ensures efficient operation even with small input-output differentials.  
- **Overcurrent Protection:** Safeguards the regulator and load from excessive current.  
- **Thermal Shutdown:** Prevents damage due to overheating.  
- **High Accuracy:** Tight output voltage tolerance (±1%).  
- **Low Quiescent Current:** Improves efficiency in battery-powered applications.  
- **Pb-Free & RoHS Compliant:** Environmentally friendly.  
This regulator is commonly used in consumer electronics, industrial systems, and embedded applications.