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LM2679S-ADJ. from NS,National Semiconductor

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LM2679S-ADJ.

Manufacturer: NS

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit

Partnumber Manufacturer Quantity Availability
LM2679S-ADJ.,LM2679SADJ NS 51 In Stock

Description and Introduction

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit The LM2679S-ADJ is a switching regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Voltage:** Adjustable (1.21V to 37V)  
- **Output Current:** Up to 3A  
- **Input Voltage Range:** 8V to 40V  
- **Switching Frequency:** 260 kHz (fixed)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  

### **Descriptions and Features:**  
- **Simple Adjustable Output:** Uses an external resistor divider to set the output voltage.  
- **High Efficiency:** Minimizes power loss with internal power MOSFET and synchronous rectification.  
- **Integrated Features:** Includes thermal shutdown, current limiting, and soft-start.  
- **Low Dropout Operation:** Maintains regulation even when input voltage is close to output.  
- **Wide Input Range:** Suitable for automotive, industrial, and battery-powered applications.  
- **Minimal External Components:** Reduces design complexity and board space.  

This regulator is designed for step-down (buck) DC-DC conversion applications.

Application Scenarios & Design Considerations

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit

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