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LM2676SD-5.0 from NS,National Semiconductor

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LM2676SD-5.0

Manufacturer: NS

SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2676SD-5.0,LM2676SD50 NS 817 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator The LM2676SD-5.0 is a step-down voltage regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Voltage:** 5.0V (fixed)  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 260 kHz  
- **Efficiency:** Up to 92%  
- **Package:** SOIC-8 (SD)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
The LM2676SD-5.0 is a monolithic integrated circuit providing all active functions for a step-down (buck) switching regulator. It is designed for high efficiency and simplicity, requiring minimal external components.  

### **Features:**  
- Simple and easy-to-use design  
- Requires only 5 external components  
- Internal soft-start reduces inrush current  
- Adjustable output version available (LM2676-ADJ)  
- Low power standby mode  
- High efficiency switching regulator  
- Thermal shutdown protection  
- Current limiting protection  

This regulator is suitable for various applications, including power supplies, industrial controls, and automotive systems.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator

Alternative Part Number

  • TPS5430DDA --: 3A step-down converter in an SOIC-8 PowerPAD package with similar input range and fixed 5V output option; widely available and pin-function compatible for many LM2676 designs.
  • LT1376CS8 --: 1.5A high-efficiency buck regulator in SO-8 with comparable switching frequency and 5V output capability; good drop-in style alternative when lower current is acceptable.
  • MC34063ADR2G --: Versatile general-purpose DC-DC converter in SOIC-8 that can be configured for 5V step-down operation; inexpensive and broadly stocked, though efficiency and current capability are lower than the LM2676.

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