LM3503ITLX-44/NOPB

LED Driver IC Overview

The LM3503ITLX-44/NOPB is a dual-display constant current LED driver manufactured by Texas Instruments. It features an integrated DC-DC step-up (boost) regulator topology designed for driving two independent LED channels. The device supports both analog and PWM dimming methods to control brightness levels. It operates with a switching frequency of 1MHz and provides a switch current capability of 750mA. The component is housed in a compact 10-TµSMD (1.9x2.07 mm) package, suitable for space-constrained applications requiring efficient backlighting solutions.

LED Driver IC Feature Summary

• Integrates a boost converter for efficient dual-channel LED drive
• Supports simultaneous analog and PWM dimming control
• Provides constant current regulation for stable LED performance

LED Driver IC Applications

• Mobile device backlighting systems
• Portable electronic display illumination
• Compact consumer electronics lighting

LED Driver IC Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance when sourcing. Confirm the package marking matches the 10-TµSMD form factor. Ensure the supplier provides the official Texas Instruments datasheet for electrical validation. Check for RoHS certification documentation prior to integration into final assemblies.

LED Driver IC Selection Notes

Select this component for designs requiring dual LED outputs from a single IC footprint. Consider the 750mA switch current limit when sizing external inductors. Evaluate the 1MHz switching frequency against EMI requirements. Compare input voltage ranges against available power rails to ensure proper boost operation.

LED Driver IC Part Context

This part belongs to the LM3503 family of LED drivers from Texas Instruments. It is specifically engineered for portable applications where board space is limited. The device simplifies design by combining the controller and power stage into one small package.

LED Driver IC Replacement Considerations

LM3503SQ-44/NOPB is a documented alternative in the same family, offering similar functionality in a different 16-WQFN package.