LT3909IDD#PBF

LED Driver IC Overview

The LT3909IDD#PBF is a dual-output step-up DC/DC regulator designed for LED lighting applications. It features two independent current channels, each capable of delivering up to 50mA. The device operates at a fixed switching frequency of 2MHz and supports both analog and PWM dimming methods. It is housed in a 12-DFN (3x3) package with exposed pad for surface mount installation. The component functions within a junction temperature range of -40°C to 125°C and holds an automotive grade classification.

LED Driver IC Feature Summary

• Dual-channel step-up architecture supporting up to 36V of LED load
• Integrated analog and PWM dimming control capabilities
• Automotive grade reliability qualification

LED Driver IC Applications

• Automotive exterior lighting systems
• Interior vehicle illumination modules
• LED headlight driver circuits

LED Driver IC Procurement Notes

Verify the specific suffix 'IDD#PBF' against the manufacturer's official datasheet to confirm pinout compatibility and lead-free status. Ensure the ordering information matches the required automotive grade specifications and package dimensions before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when designing high-frequency LED drivers requiring precise current regulation for multiple strings. The 2MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the thermal performance of the DFN package for high-power density layouts.

LED Driver IC Part Context

This part belongs to Analog Devices' LT39xx series of LED drivers. It is distinct from buck regulators like the LT3973, as it utilizes a boost topology suitable for driving LEDs above input voltage levels. The IDD#PBF designation indicates a specific industrial/automotive temperature range and lead-free packaging variant.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-compatibility with other dual-channel boost LED drivers only through direct electrical parameter comparison and official manufacturer substitution guides.