LM3503ITL-16/NOPB

LED Driver IC Overview

The LM3503ITL-16/NOPB is a dual-display constant current LED driver manufactured by Texas Instruments. It utilizes a boost topology to regulate output currents up to 400 mA per channel. The device operates within an input voltage range of 2.5 V to 5.5 V and features a switching frequency of 1 MHz. It supports both analog and PWM dimming methods for brightness control. The component is housed in a 10-TμSMD (1.9x2.07 mm) package, specifically the 10-DSBGA form factor. It functions reliably across a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Dual-output architecture providing independent constant current regulation for two display channels
• Integrated boost converter topology enabling operation from low input voltages
• Supports combined analog and pulse-width modulation (PWM) dimming capabilities

LED Driver IC Applications

• Mobile phone display backlight systems
• Portable electronic device illumination
• Small LCD panel driving circuits

LED Driver IC Procurement Notes

Verify the specific suffix 'ITL' against the manufacturer's latest documentation to confirm pinout and thermal characteristics. Confirm RoHS compliance status as indicated by the 'NOPB' designation. Ensure the 10-DSBGA package dimensions match the target PCB footprint requirements. Check for obsolescence notices or lifecycle status updates directly from Texas Instruments before finalizing procurement plans.

LED Driver IC Selection Notes

Select this component when designing compact dual-channel LED drivers requiring high efficiency in small form factors. The 1 MHz switching frequency allows for smaller external inductors compared to lower-frequency alternatives. Consider the 400 mA output limit when sizing the LED array. Verify that the required dimming interface aligns with the device's analog and PWM input specifications.

LED Driver IC Part Context

This part belongs to the LM3503 series of LED drivers designed for portable applications. It is distinct from other LM3503 variants such as the SQ or IT packages due to its specific DSBGA packaging and thermal profile. The series is engineered for mobile devices where space constraints and power efficiency are critical design parameters.

LED Driver IC Replacement Considerations

Consult Texas Instruments official substitution guides for direct replacements. Verify compatibility of the 10-DSBGA package with existing board layouts if considering alternative manufacturers.