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LM2678SX-ADJ from NSC,National Semiconductor

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LM2678SX-ADJ

Manufacturer: NSC

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2678SX-ADJ,LM2678SXADJ NSC 13002 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678SX-ADJ is a switching voltage regulator manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

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

### **Descriptions:**  
- The LM2678SX-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.  
- Designed for simplicity, it requires minimal external components.  
- Includes built-in protection features such as thermal shutdown and current limiting.  

### **Features:**  
- **Adjustable Output Voltage** (set via external resistors)  
- **High Efficiency** (up to 92%)  
- **Wide Input Voltage Range** (8V to 40V)  
- **5A Output Current Capability**  
- **Fixed-Frequency Operation** (260 kHz)  
- **Thermal Shutdown Protection**  
- **Current Limiting Protection**  
- **Soft-Start Functionality**  
- **Low Standby Current**  

This information is strictly factual and derived from the manufacturer's datasheet.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

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