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LM2679S-12 from NS,National Semiconductor

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LM2679S-12

Manufacturer: NS

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

Partnumber Manufacturer Quantity Availability
LM2679S-12,LM2679S12 NS 19 In Stock

Description and Introduction

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit The LM2679S-12 is a step-down voltage regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Voltage:** Fixed 12V  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263-7 (D2PAK)  
- **Regulation Type:** Switching Buck Regulator  
- **Protection Features:** Thermal shutdown, current limit  

### **Descriptions and Features:**  
- **Simple and Efficient:** Provides a high-efficiency step-down conversion with minimal external components.  
- **Fixed Output:** Pre-set to 12V output, eliminating the need for external feedback resistors.  
- **Wide Input Range:** Suitable for various applications requiring 12V regulation from higher input voltages.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Low Power Standby Mode:** Enhances efficiency at light loads.  
- **Thermal Protection:** Prevents damage from overheating.  

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

Application Scenarios & Design Considerations

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit
Partnumber Manufacturer Quantity Availability
LM2679S-12,LM2679S12 国半 1000 In Stock

Description and Introduction

SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit The LM2679S-12 is a switching voltage regulator manufactured by National Semiconductor (国半). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**
- **Output Voltage:** Fixed 12V  
- **Output Current:** Up to 3A  
- **Input Voltage Range:** 8V to 40V  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  

### **Descriptions:**
The LM2679S-12 is a step-down (buck) switching regulator designed for high-efficiency power conversion. It integrates a high-performance voltage regulator with a power MOSFET switch, reducing external component count. The fixed 12V output version simplifies design while providing stable power for various applications.

### **Features:**
- **Simple Design:** Requires minimal external components.  
- **High Efficiency:** Up to 92% efficiency with internal MOSFET.  
- **Wide Input Range:** Operates from 8V to 40V.  
- **Fixed Output Voltage:** Pre-set to 12V (±4% tolerance).  
- **Thermal Shutdown & Current Limiting:** Protects against overloads and overheating.  
- **Soft-Start Function:** Reduces inrush current during startup.  

This information is based on the manufacturer's datasheet for the LM2679S-12.

Application Scenarios & Design Considerations

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

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