IS31LT3350-V1STLS2-TR

Overview

The IS31LT3350-V1STLS2-TR is a DC-DC step-down LED driver IC manufactured by Lumissil Microsystems. It features an internal power switch capable of delivering up to 650mA output current. The device operates within a supply voltage range of 6V to 40V and supports both analog and PWM dimming methods. Designed for surface-mount installation, it utilizes a SOT-23-5 package. The component functions as a buck converter with a switching frequency of 154 kHz and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates an internal power MOSFET switch for simplified circuit design
• Supports dual-mode dimming via analog control signals and pulse-width modulation inputs
• Utilizes a compact SOT-23-5 surface-mount package for space-constrained applications

Applications

• LED backlighting systems
• General illumination circuits
• Signage lighting

Procurement Notes

Verify the specific suffix V1STLS2-TR against the manufacturer's official part number guide to ensure correct pinout and electrical characteristics. Confirm that the SOT-23-5 package variant matches the target PCB footprint. Check for recent Product Change Notifications (PCN) regarding material or manufacturing site updates before finalizing procurement orders.

Selection Notes

Select this component when a single-channel buck topology is required for high-current LED loads. Ensure the input voltage source remains within the 6V to 40V operational window. Consider the thermal performance of the SOT-23-5 package relative to the expected 650mA load current and ambient temperature conditions during system design.

Part Context

This part belongs to the IS31LT3350 series of high-brightness LED drivers from Lumissil Microsystems. The series includes variants with different packages and output currents, such as the SDLS2 version in SOT-89-5. This specific model distinguishes itself through the smaller SOT-23-5 form factor while maintaining similar core regulation capabilities.

Replacement Considerations

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