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LM2679SDX-ADJ from NS,National Semiconductor

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LM2679SDX-ADJ

Manufacturer: NS

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

Partnumber Manufacturer Quantity Availability
LM2679SDX-ADJ,LM2679SDXADJ NS 2500 In Stock

Description and Introduction

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit The LM2679SDX-ADJ is a switching voltage regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Voltage:** Adjustable from 1.23V to 37V  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz (fixed)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-Pin SOIC (SD)  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
The LM2679SDX-ADJ is a step-down (buck) switching regulator that provides high efficiency and simplicity in design. It integrates a high-side N-channel MOSFET switch and requires minimal external components. The adjustable version allows users to set the output voltage using external resistors.  

### **Features:**  
- Simple and easy-to-use design  
- High efficiency (up to 92%)  
- Requires only 5 external components  
- Internal soft-start for controlled inrush current  
- Adjustable output voltage  
- Wide input voltage range (8V to 40V)  
- Thermal shutdown and current limit protection  
- Low standby current (50 µA typical)  

This regulator is suitable for applications such as power supplies, industrial controls, and automotive systems.

Application Scenarios & Design Considerations

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

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