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LM2673SD-12 from NS,National Semiconductor

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LM2673SD-12

Manufacturer: NS

SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
Partnumber Manufacturer Quantity Availability
LM2673SD-12,LM2673SD12 NS 95 In Stock

Description and Introduction

SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit The LM2673SD-12 is a step-down voltage regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Voltage:** Fixed 12V  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 260 kHz  
- **Efficiency:** Up to 92%  
- **Package:** SOIC-8 (Exposed Pad)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
The LM2673SD-12 is a monolithic integrated circuit that provides all active functions for a step-down (buck) switching regulator. It is designed for high efficiency and ease of use, requiring minimal external components.  

### **Features:**  
- Simple and easy-to-design switching regulator  
- Requires only 5 external components  
- Internal soft-start reduces inrush current  
- Low power standby mode (IQ < 50 µA)  
- Adjustable output version available (LM2673)  
- High efficiency due to low dropout operation  

This regulator is suitable for applications requiring a stable 12V output from higher input voltages, such as industrial, automotive, and power supply systems.

Application Scenarios & Design Considerations

SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit

Alternative Part Number

  • TPS54312D --: Pin-compatible step-down converter with fixed 12V output and similar current rating; TI is the direct successor to National Semiconductor's power portfolio.
  • LT1933ES6#PBF --: Wide-input buck converter in a small package that can be configured for 12V output, offering a different series and vendor for design flexibility.
  • MP1584EN --: Low-cost 3A step-down regulator with adjustable output that can be set to 12V, suitable as a functional replacement in many applications.

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