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LM2678SX-5.0/NOPB from 进口原装

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LM2678SX-5.0/NOPB

Manufacturer: 进口原装, N/A, NS, NSC

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator 7-DDPAK/TO-263 -40 to 125

Partnumber Manufacturer Quantity Availability
LM2678SX-5.0/NOPB,LM2678SX50NOPB 进口原装, N/A, NS, NSC 2090 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator 7-DDPAK/TO-263 -40 to 125 The **LM2678SX-5.0/NOPB** is a switching voltage regulator manufactured by **National Semiconductor (NSC)**. Below are its key specifications, descriptions, and features:  

### **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 Type:** TO-263-7 (D2PAK)  
- **Regulator Type:** Step-Down (Buck)  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
- A **monolithic integrated circuit** providing all active functions for a step-down switching regulator.  
- Designed for **high-efficiency power conversion** with minimal external components.  
- Suitable for **battery-powered systems, industrial, and automotive applications**.  

### **Features:**  
- **Simple and easy-to-use** with minimal external components.  
- **High efficiency** (up to 92%).  
- **Wide input voltage range** (8V to 40V).  
- **Fixed 5.0V output** with ±2% tolerance.  
- **Internal soft-start** to reduce inrush current.  
- **Thermal shutdown and current limit protection**.  
- **Low standby current** in shutdown mode.  

This regulator is designed for **high-performance, cost-sensitive applications** requiring efficient power conversion.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator 7-DDPAK/TO-263 -40 to 125

Alternative Part Number

  • TPS5450DDA --: 5A step-down converter in the same family of simple switchers, wide input range, pin-compatible style SOIC package, and a common drop-in choice for 5V rail designs.
  • L5973D --: 2.5A step-down regulator with integrated switch, similar input voltage range and fixed 5V output option, widely available and cost-effective.
  • MP1584EN --: 3A high-efficiency step-down converter with wide input range, small footprint, and good availability as a lower-current alternative for 5V applications.
  • LM2596S-5.0 --: Classic 3A step-down regulator with fixed 5V output, same TO-263 package style and very common drop-in functional replacement for lower current loads.
  • LT1076CT --: 5A monolithic buck regulator with comparable voltage and current ratings, well suited as a functional replacement for the LM2678.
  • MC34063A --: Widely available general-purpose DC-DC switching regulator that can be configured for 5V step-down, useful as a low-cost fallback alternative.

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