LM3503SQX-35/NOPB

LED Driver IC Overview

The LM3503SQX-35/NOPB is a dual-display constant current LED driver manufactured by Texas Instruments. It features a boost topology with two output channels capable of delivering up to 750 mA switch current. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports an operating frequency of 1 MHz. It offers analog and PWM dimming control for brightness regulation. The component is housed in a 16-WQFN (4x4 mm) package and functions across a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Dual-output constant current regulation for independent LED channel control
• Integrated boost converter topology for efficient step-up operation
• Supports both analog and pulse-width modulation (PWM) dimming methods

LED Driver IC Applications

• Mobile phone display backlighting systems
• Portable electronic device illumination
• Handheld gaming console screens

LED Driver IC Procurement Notes

Verify the specific suffix 'X' indicates tape-and-reel packaging configuration compared to cut-tape variants. Confirm RoHS compliance status through official manufacturer documentation, as lead-free designations may vary by production batch. Ensure the 16-WQFN footprint matches the target PCB layout dimensions precisely before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when dual-channel white LED driving is required for compact mobile displays. The integrated boost converter simplifies circuit design by eliminating external inductor selection complexities associated with discrete solutions. Consider the 750 mA current limit when sizing LEDs for high-brightness applications requiring uniform luminance across multiple segments.

LED Driver IC Part Context

This part belongs to the LM3503 series of LED drivers designed specifically for portable electronics. It complements other TI offerings like the LM3502 by providing dual-channel capabilities rather than single-channel outputs. The SQX variant denotes the specific reel packaging format intended for automated surface-mount assembly processes.

LED Driver IC Replacement Considerations

The LM3503SQ-35/NOPB serves as the non-suffix equivalent for manual placement or cut-tape requirements. Verify pinout compatibility if substituting with other dual-channel boost LED drivers from different manufacturers.