Series Low Dropout Regulators 5-TO-220 -40 to 85 The **LM2931CT/NOPB** is a low-dropout voltage regulator manufactured by **National Semiconductor (NS)**.  

### **Specifications:**  
- **Input Voltage Range:** Up to 26V  
- **Output Voltage Options:** 3.3V, 5V, 12V, and adjustable versions  
- **Output Current:** 100mA (guaranteed)  
- **Dropout Voltage:** Typically 0.6V at full load  
- **Line Regulation:** 0.3% (typical)  
- **Load Regulation:** 0.4% (typical)  
- **Quiescent Current:** 1mA (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-220 (5-pin)  

### **Descriptions:**  
- Designed for low-power applications requiring stable voltage regulation.  
- Features reverse battery protection, thermal shutdown, and current limiting.  
- Suitable for automotive and industrial applications due to robustness.  

### **Features:**  
- **Low Dropout Voltage** (0.6V typical at full load)  
- **Reverse Battery Protection** (up to -50V)  
- **Thermal Shutdown & Current Limiting** for protection  
- **Low Quiescent Current** (1mA typical)  
- **Stable with Low-ESR Capacitors** (no external compensation required)  

This regulator is commonly used in battery-powered systems, automotive electronics, and industrial control circuits.

Series Low Dropout Regulators 5-TO-220 -40 to 85