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Product Detailed Parameters
- Description：IC LED DRV LIN PWM 150MA SOT23-6
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：-
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：2.5V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：42V
- Current - Output / Channel：150mA
- Frequency：-
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-6
- Supplier Device Package：SOT-23-6
- Grade：-
- Qualification：-
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Overview
The IS31LT3171-STLS4-TR is a linear LED driver IC manufactured by Lumissil Microsystems, designed for constant current regulation in lighting applications. It features a single output channel capable of delivering up to 150mA of drive current. The device operates within a supply voltage range of 2.5V to 5.5V and supports a maximum output voltage of 42V. It integrates an internal switch and supports PWM dimming control. The component is housed in a compact SOT-23-6 surface-mount package and is rated for an operating temperature range of -40°C to 125°C.
Feature Summary
- Integrates a linear regulator with an internal power switch for simplified circuit design
- Supports precise PWM dimming control for brightness adjustment
- Provides constant current regulation for stable LED performance
- Operates across an extended industrial temperature range
Applications
- General illumination systems
- LED indicator circuits
- Low-power lighting modules
Procurement Notes
Verify the specific ordering suffix and package variant when sourcing this component, as manufacturers may update part numbers or packaging formats over time. Confirm that the supplier provides official documentation, such as datasheets and product change notifications, to ensure compliance with current manufacturing standards. Cross-reference the manufacturer's part number directly with authorized distributors to avoid counterfeit or obsolete stock issues.
Selection Notes
Select this component for designs requiring a single-channel linear LED driver with integrated switching capabilities. Ensure the application voltage does not exceed the 42V output limit and the supply voltage remains within the 2.5V to 5.5V range. Consider the thermal dissipation requirements associated with linear regulation at higher voltage differentials. Verify compatibility with the required PWM dimming frequency and duty cycle specifications for the target lighting system.
Part Context
This part belongs to the IS31LT31xx series of linear LED drivers from Lumissil Microsystems. These devices are characterized by their simplicity, low component count, and built-in protection features. The series targets cost-sensitive applications where high-side or low-side driving is needed without external MOSFETs. The STLS4-TR suffix indicates the specific tape-and-reel packaging configuration for automated assembly.
Replacement Considerations
The IS31LT3178-STLS4-TR is listed as a manufacturer-recommended replacement. Both parts share similar linear driver characteristics and packaging. Verify electrical parameter compatibility, particularly output current and voltage ratings, before substituting. Note that the original IS31LT3171-STLS4-TR has been marked as obsolete by the manufacturer.
