RT8476GSP LED Driver IC Equivalent & Substitute Parts

Part Overview

The RT8476GSP is an LED Driver IC manufactured by Richtek USA Inc., designed for lighting and signage applications. This device integrates a DC-DC regulator with Step-Down (Buck) and Step-Up (Boost) topologies in an 8-SOP-EP package. The part is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

RT8476GSP

Richtek USA Inc.In Stock: 17009RT8476GSP Datasheet

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LM3410XMY/NOPB

Texas InstrumentsIn Stock: 9148LM3410XMY/NOPB Datasheet

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LM3410XMYE/NOPB

Texas InstrumentsIn Stock: 1775LM3410XMYE/NOPB Datasheet

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LT3593ES6#TRPBF

Analog Devices Inc.In Stock: 2253LT3593ES6#TRPBF Datasheet

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LT3932EUFD#PBF

Analog Devices Inc.In Stock: 1307LT3932EUFD#PBF Datasheet

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MP2488DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 20334MP2488DQ-LF-Z Datasheet

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MP3205DJ-LF-Z

Monolithic Power Systems Inc.In Stock: 33037MP3205DJ-LF-Z Datasheet

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MP3416GQH-Z

Monolithic Power Systems Inc.In Stock: 20221MP3416GQH-Z Datasheet

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MP4033GS

Monolithic Power Systems Inc.In Stock: 986MP4033GS Datasheet

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TPS61161DRVT

Texas InstrumentsIn Stock: 2243TPS61161DRVT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT8476GSP requires matching the following critical parameters:

Primary Matching Criteria:

• Topology: Step-Down (Buck) and/or Step-Up (Boost) capability
• Supply Voltage Range: Minimum 4.5V to maximum 40V input support
• Single Output configuration
• Surface Mount package with exposed pad design
• Automotive-grade qualification
• Operating temperature range: -40°C to 85°C minimum

Secondary Considerations:

• Internal switch presence (RT8476GSP has no internal switch; substitutes may vary)
• Package footprint compatibility (8-SOIC or equivalent pinout)
• Dimming capability for lighting applications
• RoHS3 compliance and automotive grade certification

The substitute parts listed below meet the core functional requirements for LED driver applications in lighting and signage, with variations in topology, switching frequency, and dimming methods based on specific design needs.

Parameter Comparison

Engineering Selection Recommendations

For Automotive Lighting Applications with Buck Topology: MP2488DQ-LF-Z and LT3932EUFD#PBF are qualified substitutes. Both maintain automotive-grade certification, support the 4.5V minimum input requirement, and provide Step-Down (Buck) topology. MP2488DQ-LF-Z operates to 55V maximum input, exceeding the RT8476GSP specification. LT3932EUFD#PBF supports up to 36V input with extended temperature operation to 125°C.

For Boost Topology Applications: TPS61161DRVT provides Step-Up (Boost) functionality with PWM dimming capability suitable for backlight and signage applications. Operating temperature range matches the RT8476GSP at -40°C to 85°C. Input voltage range is 2.7V to 18V, which covers the 4.5V minimum requirement but does not extend to the full 40V maximum of the original part.

For Flexible Topology Requirements: LM3410XMYE/NOPB offers SEPIC and Step-Up (Boost) topologies with integrated switching. This part is Active status with extended temperature operation to 125°C and RoHS3 compliance. Input range is 2.7V to 5.5V, suitable for lower-voltage LED driver applications.

Product Status Consideration: All recommended substitutes maintain Active product status with ongoing manufacturer support, ensuring long-term availability and design continuity compared to the Obsolete RT8476GSP.

Frequently Asked Questions (FAQ)

Q: Can LM3410XMYE/NOPB directly replace RT8476GSP in existing designs? A: Direct replacement requires design review. LM3410XMYE/NOPB operates with maximum input voltage of 5.5V, while RT8476GSP supports 40V. If your application uses input voltages above 5.5V, this substitute is not compatible. Package footprint differs (8-HVSSOP vs. 8-SOIC), requiring PCB layout modification.

Q: Which substitute best matches the RT8476GSP supply voltage range? A: MP2488DQ-LF-Z provides the closest match with 4.5V to 55V input range, exceeding the original 40V maximum. LT3932EUFD#PBF supports 3.6V to 36V, covering the lower end of the RT8476GSP specification.

Q: Are all substitutes automotive-grade qualified? A: MP2488DQ-LF-Z and LT3932EUFD#PBF carry automotive-grade certification. LM3410XMYE/NOPB, MP3416GQH-Z, and TPS61161DRVT do not list automotive grade in their specifications. For automotive applications, MP2488DQ-LF-Z or LT3932EUFD#PBF are recommended.

Q: What is the difference between Buck and Boost topology in these substitutes? A: Buck (Step-Down) topology reduces input voltage to lower output levels; Boost (Step-Up) topology increases input voltage to higher output levels. RT8476GSP supports both. MP2488DQ-LF-Z and LT3932EUFD#PBF provide Buck topology only. TPS61161DRVT and LM3410XMYE/NOPB provide Boost topology. Select based on your output voltage requirements relative to input voltage.

Q: Do all substitutes support PWM dimming for LED applications? A: LM3410XMYE/NOPB, LT3932EUFD#PBF, MP2488DQ-LF-Z, and TPS61161DRVT all support PWM dimming. MP3416GQH-Z does not list dimming capability in its specifications. For dimming-required applications, exclude MP3416GQH-Z.

Q: What package considerations apply when substituting? A: RT8476GSP uses 8-SOIC (0.154", 3.90mm Width) Exposed Pad. LM3410XMYE/NOPB uses 8-HVSSOP; MP2488DQ-LF-Z uses 10-QFN (3x3); LT3932EUFD#PBF uses 28-QFN (4x5); TPS61161DRVT uses 6-WSON (2x2). Each requires different PCB footprint and layout. Verify pinout compatibility before design implementation.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitutes maintain RoHS3 compliance, matching the environmental certification of the RT8476GSP.