LM3502SQ-44/NOPB

Overview

The LM3502SQ-44/NOPB is a step-up converter designed for white LED applications, housed in a 16-WQFN package. It operates within an ambient temperature range of -40°C to 85°C and supports a supply voltage from 2.5V to 5.5V. The device features an internal switch capable of handling 750mA switching current and includes PWM dimming functionality. It utilizes a boost topology with a maximum output voltage of 44V and operates at a frequency of 1MHz.

Feature Summary

• Integrates a high-efficiency boost DC-DC converter optimized for driving white LEDs
• Supports analog and PWM dimming methods for precise brightness control
• Includes internal power switch to minimize external component count

Applications

• Backlighting for portable electronic devices
• White LED illumination systems
• General-purpose LED driver circuits

Procurement Notes

Verify the specific ordering suffix and RoHS compliance status against the manufacturer's latest documentation, as availability and environmental certifications may vary by production batch. Confirm that the 16-WQFN package dimensions align with your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a compact solution for white LED backlighting is required with integrated power switching capabilities. Ensure the input voltage range matches the system's power source and verify that the thermal performance of the WQFN package suits the application's operating environment.

Part Context

This part belongs to the LM3502 family of LED drivers from Texas Instruments, specifically engineered for step-up conversion in lighting applications. It is distinct from other variants like the LM3503, which offers dual-display constant current capabilities, whereas this model focuses on single-channel boost regulation for white LEDs.

Replacement Considerations

LM3502SQ-44TR