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LM2678S-5.0 from NS,National Semiconductor

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LM2678S-5.0

Manufacturer: NS

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2678S-5.0,LM2678S50 NS 278 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678S-5.0 is a step-down voltage regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** Fixed 5.0V  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Junction Temperature:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  

### **Descriptions:**
The LM2678S-5.0 is a monolithic integrated circuit that provides all active functions for a step-down (buck) switching regulator. It is designed for high-efficiency power conversion with minimal external components. The fixed 5.0V output version simplifies design by eliminating the need for external feedback resistors.

### **Features:**
- Simple and easy-to-use design  
- High efficiency (up to 92%)  
- Requires only 5 external components  
- Internal soft-start reduces inrush current  
- Thermal shutdown and current limit protection  
- Wide input voltage range (8V to 40V)  
- Adjustable output version available (LM2678)  

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

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

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