IS31LT3350-V1SDLS2-TR

Overview

The IS31LT3350-V1SDLS2-TR is a single-channel LED driver IC manufactured by Lumissil Microsystems. It functions as a DC-DC buck converter with an integrated power MOSFET, designed for high-efficiency LED lighting applications. The device supports both analog and PWM dimming methods to control brightness levels. It operates within a supply voltage range of 6V to 40V and delivers a switch current of up to 650mA or 750mA depending on specific configuration. The unit features a switching frequency of 1MHz and is housed in a compact SOT-89-5 surface-mount package. It is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates a step-down (buck) topology with an internal power switch for simplified circuit design.
• Supports dual dimming modes including analog control and pulse-width modulation (PWM).
• Includes built-in protection mechanisms to ensure extended-life operation under various conditions.

Applications

• General LED backlighting systems
• Commercial and residential LED lighting fixtures
• Signage and display illumination

Procurement Notes

Verify the exact suffix against the manufacturer's official part number guide to confirm pinout and functional variations. Ensure compatibility with the target PCB footprint, specifically the SOT-89-5 package dimensions. Confirm moisture sensitivity level handling requirements during storage and assembly processes. Cross-reference the latest datasheet revision to validate electrical parameters before finalizing the bill of materials.

Selection Notes

Select this component for designs requiring a compact, single-channel solution with integrated switching capabilities. It is suitable for applications where space constraints limit the use of external inductors or discrete switches. Consider the input voltage range and required output current when determining suitability for specific LED string configurations. Evaluate thermal management needs based on the operating temperature range and power dissipation characteristics.

Part Context

This part belongs to the IS31LT3350 series of high-brightness LED drivers from Lumissil Microsystems. The series focuses on providing flexible design options for commercial, residential, and automotive markets through integrated solutions. These drivers are engineered to offer reliability and performance for extended-life operations in demanding environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official replacement guide or contact technical support for validated alternatives.