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LM2675M-3.3 from NSC,National Semiconductor

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LM2675M-3.3

Manufacturer: NSC, NS

SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2675M-3.3,LM2675M33 NSC, NS 10429 In Stock

Description and Introduction

SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator The LM2675M-3.3 is a step-down voltage regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 1A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOIC-8  

### **Descriptions:**
- The LM2675M-3.3 is a monolithic integrated circuit that provides all active functions for a step-down (buck) switching regulator.  
- It is designed for simple and efficient power supply solutions with minimal external components.  
- The regulator includes a fixed-frequency oscillator, a high-efficiency switch, and protection features such as thermal shutdown and current limiting.  

### **Features:**
- **Simple and Easy to Use:** Requires only 5 external components.  
- **High Efficiency:** Up to 92% efficiency reduces heat dissipation.  
- **Internal Soft-Start:** Limits inrush current during startup.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Current Limiting Protection:** Safeguards against excessive load currents.  
- **Wide Input Voltage Range:** Supports 8V to 40V input.  
- **Fixed Output Voltage:** Pre-set to 3.3V.  

This information is based on the manufacturer's datasheet. For detailed application notes and circuit examples, refer to the official documentation.

Application Scenarios & Design Considerations

SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator

Alternative Part Number

  • TPS54231D --: Pin-compatible step-down converter family from TI (which absorbed NSC); similar 3.3V output capability and wide input range, good drop-in candidate with different naming.
  • MP1584EN --: Widely used 3A step-down regulator with adjustable output, commonly substituted for LM2675 buck designs; different series and readily available.
  • AP3211KTR-G1 --: Compact 1.5A step-down converter with similar input voltage range and adjustable output, suitable alternative with distinct part numbering.

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