1.5A Constant Current Buck Regulator for Driving High Power LEDs The LM3406HVMH is a step-down DC-DC converter manufactured by Texas Instruments (NS).  

### **Specifications:**  
- **Input Voltage Range:** 6V to 42V  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** Adjustable (100kHz to 1MHz)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 16-Pin HTSSOP (PowerPAD™)  

### **Descriptions:**  
The LM3406HVMH is a constant-current buck regulator designed for driving high-power LEDs efficiently. It integrates a high-side N-channel MOSFET and supports PWM dimming for brightness control.  

### **Features:**  
- **Wide Input Voltage Range** (6V to 42V)  
- **Adjustable Output Current** (up to 1.5A)  
- **PWM Dimming Control**  
- **Thermal Shutdown Protection**  
- **Undervoltage Lockout (UVLO)**  
- **Cycle-by-Cycle Current Limiting**  
- **PowerPAD™ Package for Enhanced Thermal Performance**  

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

1.5A Constant Current Buck Regulator for Driving High Power LEDs