LM3503SQX-25

LED Driver IC Overview

The LM3503SQX-25 is a dual-display constant current LED driver manufactured by Texas Instruments. It features an integrated boost converter topology with a fixed switching frequency of 1 MHz. The device supports an operating supply voltage range from 2.5 V to 5.5 V and delivers up to 600 mA output current per channel. It provides analog and PWM dimming capabilities for brightness control. The component is housed in a 16-pin LLP package and operates within a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Dual-channel constant current drive capability for independent backlight control
• Integrated high-efficiency boost DC-DC converter
• Supports both analog and pulse-width modulation dimming methods

LED Driver IC Applications

• Mobile phone LCD backlight systems
• Portable electronic device displays
• White LED backlighting circuits

LED Driver IC Procurement Notes

Verify the specific suffix (e.g., NOPB) against the manufacturer's official documentation to confirm lead-free status and RoHS compliance. Confirm availability as this part may be discontinued or obsolete depending on the region. Ensure the ordering code matches the exact package variant required for your PCB layout.

LED Driver IC Selection Notes

Select this component when designing dual-backlight systems requiring independent current regulation. Verify that the input voltage range aligns with the battery or power source specifications. Ensure the thermal performance of the LLP package meets the application's heat dissipation requirements under maximum load conditions.

LED Driver IC Part Context

This part belongs to the LM3503 series of LED drivers designed for portable applications. It integrates power switches and control logic into a compact footprint, simplifying the design of white LED backlighting solutions for consumer electronics.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. Consult the manufacturer's obsolescence notices for potential end-of-life alternatives.