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LM2678SDX-ADJ from NSC,National Semiconductor

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LM2678SDX-ADJ

Manufacturer: NSC

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2678SDX-ADJ,LM2678SDXADJ NSC 2300 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678SDX-ADJ is a switching voltage regulator manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features:  

### **Specifications:**  
- **Input Voltage Range:** 8V to 40V  
- **Adjustable Output Voltage:** 1.21V 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:** 7-Lead TO-263 (D2PAK)  

### **Descriptions:**  
The LM2678SDX-ADJ is a step-down (buck) switching regulator with an adjustable output voltage. It integrates a high-efficiency DC-DC converter with a fixed-frequency PWM control scheme. The device is designed for simplicity, requiring minimal external components while delivering high efficiency and reliable performance.  

### **Features:**  
- **Adjustable Output Voltage** via external resistors  
- **High Efficiency** (up to 92%)  
- **Wide Input Voltage Range** (8V to 40V)  
- **5A Output Current Capability**  
- **Internal Soft-Start** for controlled startup  
- **Thermal Shutdown & Current Limit Protection**  
- **Low Power Standby Mode** (when disabled)  
- **Fixed Frequency Operation** (260 kHz) for reduced noise  

This regulator is commonly used in power supply applications, including industrial, automotive, and telecom systems.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

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