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LM2677SX-5.0 from NSC,National Semiconductor

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LM2677SX-5.0

Manufacturer: NSC, NS, NS,NS

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync

Partnumber Manufacturer Quantity Availability
LM2677SX-5.0,LM2677SX50 NSC, NS, NS,NS 8635 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync The LM2677SX-5.0 is a switching voltage regulator manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on factual information:  

### **Specifications:**  
- **Output Voltage:** Fixed 5.0V  
- **Output Current:** Up to 5A  
- **Input Voltage Range:** 8V to 40V  
- **Switching Frequency:** 260 kHz  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263-7 (D2PAK)  
- **Regulator Type:** Step-Down (Buck) Switching Regulator  

### **Descriptions:**  
The LM2677SX-5.0 is a monolithic high-efficiency switching regulator designed for step-down (buck) voltage conversion. It integrates a power MOSFET switch and requires minimal external components, making it suitable for high-current applications.  

### **Features:**  
- **Simple and Easy-to-Use Design**  
- **Internal Soft-Start** (Reduces inrush current)  
- **Wide Input Voltage Range** (8V to 40V)  
- **High Efficiency** (Up to 92%)  
- **Fixed 5.0V Output** (No external feedback resistors needed)  
- **Thermal Shutdown and Overcurrent Protection**  
- **Low Power Standby Mode** (When disabled)  
- **Requires Only 5 External Components**  

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

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync

Alternative Part Number

  • TPS5450DDA --: 5A step-down converter in the same 5.0V fixed-output class, widely available and pin-compatible in function.
  • LT1376CS8-5 --: 5.0V fixed-output buck regulator with comparable input range and current capability, a common cross for LM267x parts.
  • MC34063ADR2G --: Versatile adjustable buck regulator that can be set to 5.0V output, low-cost and broadly stocked alternative.

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