3-terminal positive regulator The LM340 is a series of positive voltage regulators manufactured by National Semiconductor (NS). Below are the specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
1. **Output Voltage Options:**
- Fixed output voltages: 5V (LM340-5.0), 12V (LM340-12), 15V (LM340-15), and others in the series.
2. **Output Current:**
- Up to 1.5A (with proper heat sinking).
3. **Input Voltage Range:**
- Typically 7.5V to 35V (varies by model).
4. **Line Regulation:**
- 0.01% / V (typical).
5. **Load Regulation:**
- 0.3% (typical).
6. **Operating Temperature Range:**
- 0°C to +125°C.
7. **Thermal Overload Protection:**
- Yes.
8. **Short-Circuit Protection:**
- Yes.
### **Descriptions:**
- The LM340 series is a monolithic integrated circuit designed for use as a fixed positive voltage regulator.
- It provides stable output voltage with minimal external components.
- Suitable for a wide range of applications, including power supplies, industrial controls, and automotive systems.
### **Features:**
1. **Thermal Overload Protection:** Prevents damage due to excessive heat.
2. **Short-Circuit Protection:** Safeguards against output shorts.
3. **Internal Current Limiting:** Protects the regulator from overcurrent conditions.
4. **Low Dropout Voltage:** Ensures efficient operation.
5. **TO-220 Package:** Common package for easy mounting and heat dissipation.
This information is based on the manufacturer's datasheet and technical documentation.
