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LM2678S-ADJ from NS,National Semiconductor

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LM2678S-ADJ

Manufacturer: NS

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2678S-ADJ,LM2678SADJ NS 2023 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678S-ADJ is a switching voltage regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**
- **Input Voltage Range:** 8V to 40V  
- **Adjustable Output Voltage Range:** 1.23V to 37V  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz (fixed)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  
- **Regulation Type:** Buck (Step-Down)  

### **Descriptions:**
The LM2678S-ADJ is a monolithic, high-efficiency, step-down switching regulator designed for easy implementation in power supply applications. It integrates a high-current switch, an oscillator, and control circuitry, requiring minimal external components. The adjustable version allows users to set the output voltage via an external resistor divider.

### **Features:**
- **Simple and Efficient Design:** Requires only 6 external components.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Thermal Shutdown & Current Limiting:** Protects the device from overload conditions.  
- **Low Power Standby Mode:** Consumes minimal current in shutdown mode.  
- **Wide Input Voltage Range:** Suitable for various industrial and automotive applications.  
- **High Efficiency:** Minimizes power dissipation.  

This information is based on the manufacturer's datasheet for the LM2678S-ADJ.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

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