LM3404MA

Overview

The LM3404MA is a monolithic switching regulator designed to deliver constant currents to high power LEDs. It operates as a buck converter with an input voltage range of 6 V to 42 V and supports output voltages up to 40 V. The device provides a regulated output current of 1 A and features programmable switching frequencies from 10 kHz to 1 MHz. It includes PWM dimming capability and functions within a temperature range of -40°C to +125°C, housed in an SOIC-8 package.

Feature Summary

• Provides constant current regulation for driving high power LEDs
• Supports external PWM dimming control for brightness adjustment
• Features adjustable switching frequency for optimized design flexibility

Applications

• High power LED lighting systems
• General illumination applications
• LED backlighting solutions

Procurement Notes

Verify the specific suffix 'MA' against the manufacturer's official documentation to confirm the exact tape-and-reel or tube packaging configuration. Ensure that the selected variant matches the required operating temperature range and pinout compatibility for the target PCB layout. Cross-reference the datasheet revision date to confirm technical specifications remain current.

Selection Notes

Select this component when a buck topology is required for LED drivers with input voltages between 6 V and 42 V. Consider the LM3404HV series if the application demands higher input voltage capabilities exceeding 42 V. Evaluate the thermal performance requirements based on the 1 A output current and the SOIC-8 package constraints for the specific ambient conditions.

Part Context

This part belongs to the LM3404 family of constant current buck regulators. It shares functional similarities with the LM3404HV but differs in maximum input voltage ratings. Evaluation boards such as the LM3404MREVAL are available to assist in circuit design and validation for this specific device family.

Replacement Considerations

The LM3404HVMAX/NOPB serves as a compatible alternative for applications requiring higher input voltage support up to 75 V while maintaining similar constant current functionality.