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LM2679S-3.3 from NS,National Semiconductor

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LM2679S-3.3

Manufacturer: NS

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

Partnumber Manufacturer Quantity Availability
LM2679S-3.3,LM2679S33 NS 16696 In Stock

Description and Introduction

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit The LM2679S-3.3 is a step-down voltage regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  
- **Regulation Type:** Buck (Step-Down) Converter  

### **Descriptions:**
The LM2679S-3.3 is a monolithic integrated circuit designed for a step-down (buck) switching regulator. It provides a fixed 3.3V output with high efficiency, making it suitable for power supply applications requiring high current and wide input voltage ranges. The device includes an internal N-channel MOSFET switch, a fixed-frequency oscillator, thermal shutdown, and current limiting for robust operation.

### **Features:**
- **High Efficiency (up to 92%)**  
- **Simple-to-Use with Minimal External Components**  
- **Internal Soft-Start for Reduced Inrush Current**  
- **Thermal Shutdown Protection**  
- **Adjustable Current Limit**  
- **Wide Input Voltage Range (8V to 40V)**  
- **Fixed 260 kHz Switching Frequency**  
- **TO-263 Package for High Power Dissipation**  

This information is strictly based on the manufacturer's datasheet for the LM2679S-3.3.

Application Scenarios & Design Considerations

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

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