LM3502SQX-35/NOPB

Overview

The LM3502SQX-35/NOPB is a Texas Instruments step-up converter designed for white LED applications. It operates with a maximum supply voltage of 5.5V and delivers an output voltage of 35V. The device supports a switch current of 750mA and functions at a frequency of 1MHz. It features PWM dimming capabilities and is housed in a 16-WQFN package with dimensions of 4mm by 4mm. The operational temperature range spans from -40°C to 85°C.

Feature Summary

• Integrated step-up topology optimized for driving white LEDs
• Supports pulse-width modulation for precise brightness control
• Compact 16-pin WQFN package design

Applications

• White LED lighting drivers
• Portable electronic display backlighting
• General-purpose boost conversion circuits

Procurement Notes

Verify the specific suffix '35' indicates the fixed 35V output configuration, distinct from other variants like the 16V version. Confirm the 'NOPB' designation ensures compliance with lead-free standards. Ensure the 16-WQFN footprint matches the target PCB layout requirements before finalizing procurement orders.

Selection Notes

Select this component when a fixed high-voltage output is required for white LED strings without external programming. Compare against the LM3502SQX-16/NOPB if lower output voltage suffices. Consider the 1MHz switching frequency for passive component sizing. Verify thermal performance within the specified operating temperature range for the intended enclosure.

Part Context

This part belongs to the LM3502 family of LED drivers from Texas Instruments. It shares architectural similarities with the LM3503 series but differs in specific output configurations and pinout details. The SQX variant denotes the tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.