1.0A Constant Current Buck Regulator for High Power LED Drivers 8-SOIC -40 to 125 The LM3404MA/NOPB is a switching regulator manufactured by National Semiconductor (NSC).  

### **Specifications:**  
- **Input Voltage Range:** 6V to 42V  
- **Output Current:** Up to 1A  
- **Switching Frequency:** Adjustable up to 1MHz  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The LM3404MA/NOPB is a step-down (buck) switching regulator designed for driving high-power LEDs efficiently. It integrates a high-side N-channel MOSFET and provides constant current output for LED applications.  

### **Features:**  
- **Wide Input Voltage Range:** Supports 6V to 42V input.  
- **PWM Dimming Control:** Allows brightness adjustment.  
- **Thermal Shutdown Protection:** Prevents overheating.  
- **Adjustable Switching Frequency:** Up to 1MHz for optimized efficiency.  
- **High Efficiency:** Up to 95% for reduced power loss.  
- **Open LED Protection:** Safeguards against LED failures.  

This regulator is commonly used in LED lighting, automotive, and industrial applications.

1.0A Constant Current Buck Regulator for High Power LED Drivers 8-SOIC -40 to 125