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LM2679SX-5.0 from NS,National Semiconductor

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LM2679SX-5.0

Manufacturer: NS

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

Partnumber Manufacturer Quantity Availability
LM2679SX-5.0,LM2679SX50 NS 11500 In Stock

Description and Introduction

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit The LM2679SX-5.0 is a switching voltage regulator manufactured by National Semiconductor (NS). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** Fixed 5.0V  
- **Output Current:** Up to 3A  
- **Input Voltage Range:** 8V to 40V  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Package:** TO-263 (D2PAK)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Regulation Type:** Step-down (Buck) converter  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**
The LM2679SX-5.0 is a monolithic high-efficiency switching regulator designed for step-down (buck) voltage conversion. It integrates a power MOSFET switch, oscillator, control circuitry, and protection features into a single package. The fixed 5.0V output version simplifies design by eliminating the need for external feedback resistors.

### **Features:**
- **Simple Design:** Requires minimal external components.  
- **High Efficiency:** Up to 92% efficiency reduces power dissipation.  
- **Wide Input Range:** Operates from 8V to 40V.  
- **Fixed Output Voltage:** 5.0V ±2% accuracy.  
- **Thermal Protection:** Auto-shutdown in case of overheating.  
- **Current Limiting:** Protects against excessive load currents.  
- **Low Power Standby Mode:** Consumes minimal current when disabled.  

This regulator is commonly used in power supply applications for industrial, automotive, and consumer electronics.

Application Scenarios & Design Considerations

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

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