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LM340T12-7812 from NS,National Semiconductor

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LM340T12-7812

Manufacturer: NS

3-Terminal Positive Regulators

Partnumber Manufacturer Quantity Availability
LM340T12-7812,LM340T127812 NS 100 In Stock

Description and Introduction

3-Terminal Positive Regulators The LM340T12 and LM7812 are voltage regulator ICs manufactured by National Semiconductor (NS).  

### **LM340T12 Specifications:**  
- **Output Voltage:** 12V  
- **Output Current:** Up to 1.5A  
- **Input Voltage Range:** 14.5V to 35V (typical)  
- **Dropout Voltage:** 2V (typical)  
- **Line Regulation:** 0.01%/V (typical)  
- **Load Regulation:** 0.3% (typical)  
- **Operating Temperature Range:** 0°C to +125°C  
- **Package:** TO-220  

### **LM7812 Specifications:**  
- **Output Voltage:** 12V  
- **Output Current:** Up to 1A  
- **Input Voltage Range:** 14V to 35V (typical)  
- **Dropout Voltage:** 2V (typical)  
- **Line Regulation:** 0.01%/V (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Operating Temperature Range:** 0°C to +125°C  
- **Package:** TO-220  

### **Descriptions & Features:**  
- Both are **fixed positive voltage regulators** designed to provide a stable 12V output.  
- **Thermal overload protection** prevents damage due to excessive heat.  
- **Short-circuit protection** safeguards against output shorts.  
- **Internal current limiting** ensures safe operation under high loads.  
- Suitable for **power supply applications** in consumer electronics, industrial systems, and automotive circuits.  
- The **LM340T12** is part of the LM340 series, while the **LM7812** is part of the 78xx series.  

Both regulators require input capacitors for stability and output capacitors for transient response improvement.

Application Scenarios & Design Considerations

3-Terminal Positive Regulators

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