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Product Detailed Parameters
- Description：IC LED DRIVER RGLTR PWM 3A 8MSOP
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Down (Buck)
- Internal Switch(s)：Yes
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：38V
- Voltage - Output：-
- Current - Output / Channel：3A
- Frequency：-
- Dimming：PWM
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：8-MSOP
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The IS32LT3953-GRLA3-TR is a single-output DC-DC buck switching regulator designed for LED lighting applications. It delivers a regulated output current of 3A and supports PWM dimming with spread spectrum functionality to reduce electromagnetic interference. The device operates within an input voltage range of 4.5V to 40V and is housed in an 8-MSOP package with an exposed pad. It is qualified to AEC-Q100 standards for automotive use and functions across a temperature range of -40°C to +125°C.
Feature Summary
- Integrates a high-current 3A buck converter topology for efficient LED driving
- Features spread spectrum modulation to minimize conducted and radiated EMI noise
- Supports precise PWM dimming control for adjustable brightness levels
- Includes built-in fault protection mechanisms for system reliability
Applications
- Automotive exterior lighting systems
- Interior ambient LED illumination
- Industrial LED lighting fixtures
- General-purpose constant current LED drivers
Procurement Notes
Verify the specific suffix GRLA3 against the manufacturer's latest datasheet to confirm pinout compatibility and thermal characteristics. Ensure the procurement source provides valid traceability documentation for AEC-Q100 certified components. Confirm that the 8-MSOP-EP package dimensions match the target PCB footprint requirements before finalizing orders.
Selection Notes
Select this component when a single-channel, high-current solution is required for automotive or industrial LED loads. The integrated buck topology eliminates the need for external power switches, simplifying the bill of materials. Consider the 3A output capability and 40V input limit to ensure adequate headroom for the specific LED string configuration and supply voltage variations.
Part Context
This part belongs to the IS32LT39xx series of LED drivers from Lumissil Microsystems. The series focuses on robust, automotive-grade power management solutions. The IS32LT3953 specifically targets applications requiring higher current density than lower-end models while maintaining compact packaging constraints typical of modern electronic assemblies.
Replacement Considerations
The IS32LT3952-GRLA3-TR serves as a lower-current alternative within the same family, offering 1.5A output. Designers requiring reduced power consumption may consider this substitute, provided the load current does not exceed 1.5A. Verify that the thermal performance of the 8-SOP-EP package remains sufficient for the new operating conditions.
