LM3502SQX-35

Overview

The LM3502SQX-35 is a dual-output DC-DC step-up converter designed for white LED backlight applications. It operates within an input voltage range up to 5.5V and supports PWM dimming control. The device delivers a maximum switch current of 750mA and features a 16-WQFN (4x4) package. It functions reliably across a temperature range of -40°C to 85°C, providing constant current regulation for dual-display configurations.

Feature Summary

• Dual-output architecture supporting independent LED channel control
• Integrated step-up (boost) topology for efficient voltage conversion
• Supports PWM dimming for precise brightness adjustment

Applications

• White LED backlighting systems
• Dual-display panel illumination
• Portable electronic device lighting

Procurement Notes

Verify the specific suffix 'X' indicates tape-and-reel packaging configuration when sourcing. Confirm RoHS compliance status matches environmental requirements. Ensure the operating temperature grade aligns with system thermal design constraints. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision history before procurement.

Selection Notes

Select this component for applications requiring dual-channel LED driving from a single boost converter stage. Consider the 750mA switch current limit when sizing inductor components. Evaluate the 16-WQFN footprint for PCB layout compatibility. Verify that the required dimming signal interface matches the PWM input specifications of the controller.

Part Context

This device belongs to the LM3502 family of LED drivers manufactured by Texas Instruments. It serves as a specialized power management solution for display backlighting, distinguishing itself through dual-output capability compared to single-channel alternatives. The series focuses on efficiency and compact integration for mobile and portable electronics.

Replacement Considerations

LM3502SQX-35/NOPB is a documented equivalent variant.