LT3909HMSE#PBF

LED Driver IC Overview

The LT3909HMSE#PBF is a dual-channel step-up LED driver manufactured by Analog Devices Inc. It operates from a minimum supply voltage of 2.9V and delivers up to 50mA per channel. The device features a 2MHz switching frequency and ±2% current matching accuracy between outputs. It is housed in a 12-pin MSOP-EP package and supports PWM dimming control. The component functions within an operating temperature range of -40°C to +125°C, designed for high-efficiency LED illumination applications requiring precise current regulation.

LED Driver IC Feature Summary

• Dual-channel boost topology with integrated 50mA output drivers
• High precision ±2% current matching between channels
• Supports PWM dimming control for brightness adjustment
• Operates at a fixed 2MHz switching frequency

LED Driver IC Applications

• Multi-string LED lighting systems
• Portable device backlighting
• Industrial indicator arrays
• Automotive interior illumination

LED Driver IC Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape-and-reel or tube packaging as defined by Analog Devices standards. Confirm that the MSOP-EP package thermal pad requirements are met by the target PCB layout. Ensure the input voltage range of 2.9V minimum aligns with the system power source before finalizing procurement specifications.

LED Driver IC Selection Notes

Select this component when dual independent LED strings require matched current regulation without external resistor trimming. The 2MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 2.9V minimum input voltage constraint against the available power rail. The EP package variant necessitates careful thermal management design due to exposed pad construction.

LED Driver IC Part Context

This part belongs to the LT39xx series of LED drivers from Analog Devices. It complements other single-channel or higher-current variants in the portfolio. The MSOP-EP package provides a compact footprint suitable for space-constrained portable electronics. It represents a specialized solution for applications demanding precise multi-channel current control rather than general-purpose power management.

LED Driver IC Replacement Considerations

LT3909HMSE#TRPBF serves as the primary alternative, differing primarily in reel versus tube packaging configuration while maintaining identical electrical characteristics. Verify pinout compatibility and thermal performance when substituting between packaging types.