0.5A Constant Current Buck Regulator for High Power LED Drivers 8-SO PowerPAD The LM3402HVMR/NOPB is a switching regulator manufactured by Texas Instruments (NS).  

### **Specifications:**  
- **Input Voltage Range:** 6V to 75V  
- **Output Voltage Range:** Adjustable down to 1.25V  
- **Output Current:** Up to 525mA  
- **Switching Frequency:** Adjustable up to 1MHz  
- **Efficiency:** Up to 94%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-Pin SOIC (Exposed Pad)  
- **Topology:** Buck (Step-Down) Converter  

### **Descriptions:**  
The LM3402HVMR/NOPB is a high-voltage, constant-on-time (COT) buck regulator designed for driving LEDs efficiently. It provides accurate current regulation and supports PWM dimming.  

### **Features:**  
- **Wide Input Voltage Range** (6V to 75V)  
- **Adjustable Output Current** (via external resistor)  
- **Constant-On-Time Control** for fast transient response  
- **PWM Dimming Support**  
- **Thermal Shutdown Protection**  
- **Undervoltage Lockout (UVLO)**  
- **Low Dropout Operation**  

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

*(Note: "NS" refers to National Semiconductor, which was acquired by Texas Instruments.)*

0.5A Constant Current Buck Regulator for High Power LED Drivers 8-SO PowerPAD