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LM2674MX-3.3 from NS,National Semiconductor

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LM2674MX-3.3

Manufacturer: NS

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

Partnumber Manufacturer Quantity Availability
LM2674MX-3.3,LM2674MX33 NS 2502 In Stock

Description and Introduction

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator The LM2674MX-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:** 260kHz (typical)  
- **Efficiency:** Up to 90%  
- **Package:** SOIC-8  
- **Operating Temperature Range:** -40°C to +125°C  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
The LM2674MX-3.3 is a monolithic integrated circuit designed for step-down (buck) voltage regulation. It provides a fixed 3.3V output with high efficiency and requires minimal external components.  

### **Features:**  
- Simple and easy-to-use design  
- Requires only 5 external components  
- Internal soft-start for controlled inrush current  
- Low power standby mode  
- Adjustable output version available (LM2674MX-ADJ)  
- High efficiency switching regulator  

This regulator is commonly used in power supply applications requiring stable 3.3V output from higher input voltages.

Application Scenarios & Design Considerations

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

Alternative Part Number

  • TPS54231D --: Pin-compatible step-down converter family from TI with similar 3.3V fixed output capability and wide input range; TI is the direct successor for many National Semiconductor parts.
  • MP1584EN --: Widely available 3A step-down regulator with adjustable output that can be set to 3.3V; lower cost and good availability as a drop-in functional replacement.
  • AP3211KTR-G1 --: Compact 1.5A synchronous buck converter with adjustable output settable to 3.3V; different series naming and suitable for similar low-power 3.3V rail applications.

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