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LM2674LD-3.3 from NS,National Semiconductor

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LM2674LD-3.3

Manufacturer: NS

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2674LD-3.3,LM2674LD33 NS 1150 In Stock

Description and Introduction

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator The LM2674LD-3.3 is a step-down voltage regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 500mA  
- **Switching Frequency:** 260 kHz  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOIC-8 (LD)  
- **Regulation Type:** Switching Regulator (Buck Converter)  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
The LM2674LD-3.3 is a monolithic integrated circuit designed for step-down (buck) voltage regulation. It provides a fixed 3.3V output from an input voltage range of 8V to 40V, making it suitable for various power supply applications.  

### **Features:**  
- Simple and easy-to-use design  
- Requires minimal external components  
- High efficiency (up to 90%)  
- Internal soft-start for reduced inrush current  
- Thermal shutdown protection  
- Current limiting for overload protection  
- Low standby current in shutdown mode  

This regulator is commonly used in industrial, automotive, and consumer electronics applications where efficient power conversion is needed.

Application Scenarios & Design Considerations

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator

Alternative Part Number

  • TPS54231D --: Widely available 3.3V-capable step-down converter in SOIC-8; different series and package, good functional substitute for LM2674LD-3.3 with adequate current rating.
  • MP1584EN --: Popular 3A step-down regulator in SOIC-8, different naming and vendor; suitable drop-in style replacement for 3.3V buck applications.
  • AP3211KTR-G1 --: Compact 1.5A step-down converter in SOT-23-6, different series and package; usable alternative for low-current 3.3V rails where board space is limited.

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