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LM2678SD-5.0 from NS,National Semiconductor

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LM2678SD-5.0

Manufacturer: NS

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2678SD-5.0,LM2678SD50 NS 980 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678SD-5.0 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:** 5.0V (fixed)  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Package:** 8-Pin SOIC (SD)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Regulation Type:** Switching Buck Regulator  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**
The LM2678SD-5.0 is a monolithic integrated circuit designed for step-down (buck) voltage regulation. It provides a fixed 5.0V output from an input voltage ranging from 8V to 40V, making it suitable for applications requiring efficient power conversion. The device integrates a high-efficiency switching regulator with minimal external components, simplifying design and reducing board space.

### **Features:**
- **High Efficiency:** Up to 92% efficiency reduces power dissipation.  
- **Wide Input Voltage Range:** Operates from 8V to 40V.  
- **Fixed Output Voltage:** 5.0V with ±2% accuracy.  
- **High Output Current:** Supports up to 5A load current.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Current Limiting:** Protects against output overloads.  
- **Low Standby Current:** Typically 50µA in shutdown mode.  
- **Simple External Components:** Requires only an inductor, diode, and capacitors for operation.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
Partnumber Manufacturer Quantity Availability
LM2678SD-5.0,LM2678SD50 NS,NS 250 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678SD-5.0 is a switching voltage regulator manufactured by National Semiconductor (NS).  

### Specifications:  
- **Output Voltage**: 5.0V (fixed)  
- **Input Voltage Range**: 8V to 40V  
- **Output Current**: Up to 5A  
- **Switching Frequency**: 260 kHz (typical)  
- **Efficiency**: Up to 92%  
- **Package**: 8-Pin SOIC (SD)  
- **Operating Temperature Range**: -40°C to +125°C  
- **Protection Features**: Thermal shutdown, current limiting  

### Descriptions and Features:  
- **Simple and Easy to Use**: Requires minimal external components.  
- **High Efficiency**: Uses a buck regulator topology for efficient power conversion.  
- **Fixed Output Voltage**: Eliminates the need for external feedback resistors.  
- **Wide Input Voltage Range**: Suitable for various industrial and automotive applications.  
- **Internal Soft-Start**: Reduces inrush current during startup.  
- **Low Power Standby Mode**: Enhances efficiency at light loads.  

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

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

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