3-Terminal Positive Regulators The LM7818CT is a fixed voltage regulator manufactured by NS (National Semiconductor). Here are its specifications, descriptions, and features:

### **Specifications:**  
- **Output Voltage:** +18V  
- **Output Current:** Up to 1.5A  
- **Input Voltage Range:** 21V to 35V (recommended)  
- **Dropout Voltage:** 2V (typical)  
- **Line Regulation:** 0.03% (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Operating Temperature Range:** 0°C to +125°C  
- **Package Type:** TO-220  

### **Descriptions:**  
The LM7818CT is a three-terminal positive voltage regulator designed to provide a stable +18V DC output. It includes internal current limiting, thermal shutdown, and safe operating area protection, making it reliable for various applications.  

### **Features:**  
- **Fixed Output Voltage:** +18V ±4%  
- **Thermal Overload Protection**  
- **Short-Circuit Protection**  
- **No External Components Required (for basic operation)**  
- **High Ripple Rejection**  

This information is based on the manufacturer's datasheet.

3-Terminal Positive Regulators