LM3503SQ-35

LED Driver IC Overview

The LM3503SQ-35 is a dual-display constant current LED driver manufactured by Texas Instruments. It features an integrated boost converter topology designed for driving two independent LED channels. The device supports analog brightness control and operates within a supply voltage range of 2.5V to 5.5V. It utilizes a 16-WQFN (4x4 mm) package with exposed thermal pad. The component functions at a switching frequency of 1 MHz and is rated for operation between -40°C and +85°C.

LED Driver IC Feature Summary

• Dual-channel constant current regulation for independent LED outputs
• Integrated high-efficiency boost DC-DC converter
• Analog brightness control interface for dimming applications

LED Driver IC Applications

• Mobile phone backlighting systems
• Portable electronic display illumination
• Camera flash LED drivers

LED Driver IC Procurement Notes

Verify the specific suffix '35' against the official datasheet to confirm the correct output voltage rating and pin configuration. Confirm RoHS compliance status as documentation may vary by production batch. Check for obsolete status or active replacement recommendations from the manufacturer before finalizing procurement plans.

LED Driver IC Selection Notes

Select this component when designing circuits requiring dual LED channel control with analog dimming capabilities. Ensure the input power supply meets the minimum 2.5V requirement. Verify that the application environment stays within the specified operating temperature range of -40°C to +85°C for reliable performance.

LED Driver IC Part Context

This part belongs to the LM3503 series, which includes variants such as LM3503SQ-16 and LM3503SQ-44. These devices are engineered for portable electronics where space efficiency and power management are critical. The series provides integrated solutions for white LED backlighting in compact form factors.

LED Driver IC Replacement Considerations

Public records indicate that the LM3503SQ-35 is obsolete and no longer manufactured. Designers should consult the manufacturer's official substitution guide for recommended equivalent components or newer generation alternatives.