SC600DIMLTRT LED Driver IC Equivalent & Substitute Parts

Part Overview

The SC600DIMLTRT is a LED Driver IC manufactured by Semtech Corporation, classified as a Power Management (PMIC) device. This component functions as a 1-output DC DC regulator utilizing switched capacitor (charge pump) topology with 120mA output current capability and 650kHz switching frequency. Designed for backlight applications, the SC600DIMLTRT operates across a 2.5V to 6.5V supply voltage range with a 5V output specification.

The SC600DIMLTRT is currently classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this LED driver topology.

Substiute Parts

SC600DIMLTRT

Semtech CorporationIn Stock: 7746SC600DIMLTRT Datasheet

Current PartRFQ

LTC3215EDD#PBF

Analog Devices Inc.In Stock: 2219LTC3215EDD#PBF Datasheet

MFR RecommendedRFQ

MIC3289-16YML-TR

Microchip TechnologyIn Stock: 881MIC3289-16YML-TR Datasheet

MFR RecommendedRFQ

MP1518DJE-LF-Z

Monolithic Power Systems Inc.In Stock: 17682MP1518DJE-LF-Z Datasheet

MFR RecommendedRFQ

MP2488DQ-LF-Z

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

MFR RecommendedRFQ

MP3214DQ-LF-P

Monolithic Power Systems Inc.In Stock: 720MP3214DQ-LF-P Datasheet

MFR RecommendedRFQ

MP3309LGQG-P

Monolithic Power Systems Inc.In Stock: 842MP3309LGQG-P Datasheet

MFR RecommendedRFQ

MP4688DN-LF-Z

Monolithic Power Systems Inc.In Stock: 25464MP4688DN-LF-Z Datasheet

MFR RecommendedRFQ

RT8463ZQW

Richtek USA Inc.In Stock: 1139RT8463ZQW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC600DIMLTRT requires evaluation based on the following critical parameters:

Topology Compatibility: The SC600DIMLTRT employs switched capacitor (charge pump) topology. Substitute parts must maintain this topology to preserve circuit behavior and output characteristics without requiring significant redesign.

Electrical Specifications: Supply voltage range (2.5V to 6.5V), output voltage (5V), and output current (120mA) define the operational envelope. Substitute parts must support equivalent or superior specifications within these ranges.

Package and Mounting: The 10-VFDFN exposed pad package with surface mount configuration establishes physical and thermal interface requirements. Substitute parts utilizing compatible packages ensure PCB layout compatibility.

Application Domain: Backlight application classification indicates the intended use case. Substitute parts designated for backlight or compatible lighting applications maintain functional alignment.

Compliance and Reliability: RoHS compliance and MSL rating (1 - Unlimited) establish environmental and manufacturing standards. Substitute parts must meet or exceed these compliance levels.

The following substitute parts are grouped based on topology alignment and electrical parameter compatibility with the SC600DIMLTRT.

Parameter Comparison

Engineering Selection Recommendations

Topology-Based Selection:

Parts maintaining switched capacitor (charge pump) topology—LTC3215EDD#PBF and MP3214DQ-LF-P—preserve the original circuit architecture and require minimal redesign effort. LTC3215EDD#PBF offers 700mA output current with active product status and ROHS3 compliance. MP3214DQ-LF-P provides 500mA output current with active status and supports backlight and camera flash applications.

Supply Voltage Compatibility:

The SC600DIMLTRT operates from 2.5V to 6.5V. MIC3289-16YML-TR, MP1518DJE-LF-Z, MP3214DQ-LF-P, and MP3309LGQG-P maintain the 2.5V minimum supply voltage threshold. Parts with higher minimum supply requirements (LTC3215EDD#PBF at 2.9V, MP2488DQ-LF-Z at 4.5V, MP4688DN-LF-Z at 4.5V, RT8463ZQW at 4.5V) may require circuit modifications if lower supply voltages are critical to the application.

Output Current Capacity:

The SC600DIMLTRT delivers 120mA. All listed substitute parts exceed this specification, providing design margin. LTC3215EDD#PBF (700mA), MIC3289-16YML-TR (1.2A), MP1518DJE-LF-Z (350mA), MP2488DQ-LF-Z (2A), MP3214DQ-LF-P (500mA), MP4688DN-LF-Z (1A), and RT8463ZQW (2A) all support higher current demands.

Package Considerations:

LTC3215EDD#PBF and MP2488DQ-LF-Z utilize 10-pin DFN/QFN packages similar to the original 10-VFDFN, facilitating PCB layout compatibility. MP3214DQ-LF-P uses a 16-pin QFN package requiring expanded footprint space. MIC3289-16YML-TR, MP1518DJE-LF-Z, MP3309LGQG-P, MP4688DN-LF-Z, and RT8463ZQW employ different package geometries necessitating layout redesign.

Compliance and Reliability:

All substitute parts maintain RoHS3 compliance, exceeding the original RoHS requirement. MSL ratings vary: LTC3215EDD#PBF, MIC3289-16YML-TR, MP1518DJE-LF-Z, MP2488DQ-LF-Z, MP3214DQ-LF-P, and MP3309LGQG-P all feature MSL 1 (Unlimited), matching the original specification. MP4688DN-LF-Z (MSL 2A) and RT8463ZQW (MSL 3) require extended moisture control during storage and assembly.

Application Alignment:

LTC3215EDD#PBF, MIC3289-16YML-TR, MP1518DJE-LF-Z, MP3214DQ-LF-P, MP3309LGQG-P, and RT8463ZQW are designated for backlight applications, directly aligning with the SC600DIMLTRT use case. MP2488DQ-LF-Z and MP4688DN-LF-Z target lighting applications with automotive-grade qualification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SC600DIMLTRT with any of these substitute parts without PCB modifications?

A: Direct replacement without PCB modifications is limited to parts with compatible package footprints. LTC3215EDD#PBF and MP2488DQ-LF-Z utilize 10-pin DFN/QFN packages similar to the original 10-VFDFN, potentially allowing drop-in replacement if pin assignments align. All other substitute parts require PCB layout redesign due to different package geometries or pin counts.

Q: What is the primary difference between switched capacitor topology and boost topology substitutes?

A: Switched capacitor (charge pump) topology—used in SC600DIMLTRT, LTC3215EDD#PBF, and MP3214DQ-LF-P—generates output voltage through capacitive energy transfer without inductors, resulting in compact designs suitable for space-constrained applications. Boost (step-up) topology—used in MIC3289-16YML-TR, MP1518DJE-LF-Z, and MP3309LGQG-P—employs inductors for energy storage, enabling higher current delivery and wider output voltage ranges. Circuit design and external component requirements differ significantly between these topologies.

Q: Which substitute part best matches the SC600DIMLTRT specifications?

A: LTC3215EDD#PBF provides the closest functional alignment, maintaining switched capacitor topology, single output configuration, and backlight application focus. However, its supply voltage range (2.9V to 4.4V) is narrower than the original (2.5V to 6.5V), and its operating temperature range (-40°C to 85°C) is reduced compared to the SC600DIMLTRT (-40°C to 150°C). MP3214DQ-LF-P also maintains charge pump topology with a 2.7V to 5.5V supply range and supports backlight applications, though its 16-pin package requires layout modifications.

Q: Are there automotive-grade alternatives available?

A: MP2488DQ-LF-Z and MP4688DN-LF-Z both carry automotive-grade qualification. MP2488DQ-LF-Z is a step-down (buck) regulator with 2A output current, while MP4688DN-LF-Z is a step-down regulator with 1A output current. Both require higher minimum supply voltages (4.5V) compared to the SC600DIMLTRT (2.5V minimum).

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings in the substitute parts?

A: MSL ratings define moisture exposure limits during storage and assembly. The SC600DIMLTRT and most substitute parts feature MSL 1 (Unlimited), allowing indefinite storage without moisture control. MP4688DN-LF-Z (MSL 2A) requires moisture control for up to 4 weeks of storage, and RT8463ZQW (MSL 3) requires control for up to 168 hours. Higher MSL ratings necessitate baking procedures before reflow soldering to prevent moisture-induced defects.

Q: Can I use a higher current-rated substitute if my application only requires 120mA?

A: Yes. All substitute parts exceed the 120mA requirement, providing design margin and thermal headroom. Higher current ratings do not negatively impact performance at lower operating currents. However, verify that the substitute part's supply voltage range, output voltage specification, and topology align with your circuit requirements.

Q: What are the key differences between PWM and analog dimming capabilities?

A: PWM (Pulse Width Modulation) dimming controls LED brightness by varying the duty cycle of a high-frequency switching signal, enabling rapid brightness transitions and precise control. Analog dimming adjusts brightness by modulating the reference voltage or control signal, providing continuous brightness variation. MP1518DJE-LF-Z, MP2488DQ-LF-Z, MP3309LGQG-P, and RT8463ZQW support both PWM and analog dimming, offering design flexibility. The SC600DIMLTRT does not specify dimming capability, indicating fixed-output operation.