LM3404MR/NOPB

Overview

The LM3404MR/NOPB is a constant current buck regulator designed for LED lighting applications. It operates with an input voltage range of 6 V to 42 V and supports a maximum output voltage of 40 V. The device delivers a regulated output current of 1 A. It features an adjustable switching frequency ranging from 10 kHz to 1 MHz. The component functions within a temperature range of -40 °C to +125 °C and is housed in an SO-PowerPad-8 package.

Feature Summary

• Integrates an internal power switch for compact circuit design
• Supports PWM dimming control for brightness adjustment
• Includes thermal shutdown protection for enhanced reliability

Applications

• General LED illumination systems
• Automotive interior lighting
• Portable lighting devices

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure the selected variant matches the required operating temperature range and package dimensions for your PCB layout. Cross-reference the datasheet revision history to validate parameter consistency before finalizing procurement orders.

Selection Notes

Select this component when a single-channel, high-efficiency buck topology is required for driving LEDs from a wide input voltage range. Consider the SO-PowerPad-8 package for thermal management needs. Evaluate the external component requirements for inductors and capacitors based on the desired switching frequency and output current settings defined in the application circuit.

Part Context

This part belongs to the LM3404 series of LED drivers from Texas Instruments. The series focuses on providing precise constant current regulation for various LED loads. The MR suffix indicates the specific surface-mount packaging type used for this device variant within the broader product family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.