SC5012QMLTRT LED Driver IC Equivalent & Substitute Parts

Part Overview

The SC5012QMLTRT is a 4-output LED driver IC manufactured by Semtech Corporation, designed for backlight applications with step-up (boost) topology. This device operates as a DC-DC controller with PWM and analog dimming capabilities, delivering 150mA per channel across a 4.5V to 45V supply range with 65V output capability.

The SC5012QMLTRT carries a "Not For New Designs" status, indicating it is no longer recommended for new product development. This obsolescence necessitates identification of functionally equivalent alternatives that maintain compatibility with existing system requirements while offering active product status and continued manufacturer support.

Substiute Parts

SC5012QMLTRT

Semtech CorporationIn Stock: 16090SC5012QMLTRT Datasheet

Current PartRFQ

LP8860BQVFPRQ1

Texas InstrumentsIn Stock: 2688LP8860BQVFPRQ1 Datasheet

MFR RecommendedRFQ

LP8860CQVFPRQ1

Texas InstrumentsIn Stock: 3347LP8860CQVFPRQ1 Datasheet

MFR RecommendedRFQ

MP3398AGF

Monolithic Power Systems Inc.In Stock: 788MP3398AGF Datasheet

MFR RecommendedRFQ

MP3398BGF

Monolithic Power Systems Inc.In Stock: 1017MP3398BGF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC5012QMLTRT are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• 4-output LED driver topology with step-up (boost) DC-DC controller architecture
• 150mA output current per channel
• PWM dimming capability (analog dimming is optional for substitutes)
• Automotive-grade qualification
• Surface mount packaging with compatible pinout and thermal characteristics
• Operating temperature range of -40°C minimum to 105°C minimum

Secondary Compatibility Factors:

• Supply voltage range overlap with SC5012QMLTRT (minimum 4.5V, maximum 45V)
• Output voltage capability sufficient for backlight applications
• Switching frequency within acceptable range for LED driver applications
• Active product status with manufacturer support

The substitute parts identified—LP8860BQVFPRQ1, LP8860CQVFPRQ1, and MP3398AGF/MP3398BGF—meet these core criteria while offering enhanced specifications or improved availability compared to the obsolete SC5012QMLTRT.

Parameter Comparison

Engineering Selection Recommendations

LP8860BQVFPRQ1 and LP8860CQVFPRQ1 (Texas Instruments)

These devices are manufacturer-recommended substitutes with active product status and AEC-Q100 automotive qualification. Both maintain 4-output configuration, 150mA per-channel current, and PWM dimming capability. The LP8860 series operates across 3V to 48V supply range with extended temperature rating to 125°C. The primary design consideration is package transition from 24-QFN to 32-HLQFP, requiring PCB layout modification. LP8860CQVFPRQ1 is supplied in tape-and-reel packaging, matching the original SC5012QMLTRT format. Both devices are ROHS3 compliant with REACH unaffected status.

MP3398AGF and MP3398BGF (Monolithic Power Systems)

These alternatives provide higher per-channel current capability (350mA versus 150mA) with dual dimming support (analog and PWM). Operating range spans 5V to 28V, which is more restrictive than the SC5012QMLTRT but suitable for standard backlight applications. The 16-TSSOP-EP package represents a significant size reduction compared to the original 24-QFN. Both variants carry active product status with ROHS3 compliance and REACH unaffected designation. Temperature rating extends to 125°C. The MP3398 series is suitable for applications where higher current capability and compact packaging are advantageous.

Selection Basis:

• LP8860 series: Recommended for designs requiring closest functional match to SC5012QMLTRT with maintained 150mA per-channel specification and automotive AEC-Q100 qualification
• MP3398 series: Suitable for applications benefiting from increased current capacity and reduced package footprint, with trade-off of lower maximum supply voltage

All substitute options provide active product status, eliminating obsolescence risk associated with the SC5012QMLTRT.

Frequently Asked Questions (FAQ)

Q: Can LP8860BQVFPRQ1 and LP8860CQVFPRQ1 be used interchangeably with SC5012QMLTRT?

A: Both LP8860 variants maintain functional equivalence in 4-output topology, 150mA per-channel current, and PWM dimming capability. The primary design change is package format transition from 24-QFN (4x4) to 32-HLQFP (7x7), requiring PCB layout redesign. Electrical performance is compatible within the overlapping supply voltage range (4.5V to 48V). LP8860CQVFPRQ1 is supplied in tape-and-reel format, matching original packaging.

Q: What are the key differences between LP8860 and MP3398 substitutes?

A: LP8860 devices maintain the 150mA per-channel current specification of the original SC5012QMLTRT with extended supply voltage range (3V to 48V) and AEC-Q100 automotive qualification. MP3398 variants offer higher per-channel current (350mA) with compact 16-TSSOP-EP packaging but operate within a narrower supply range (5V to 28V). Both support PWM dimming; MP3398 additionally supports analog dimming.

Q: Is package compatibility a concern when substituting these parts?

A: Yes. The SC5012QMLTRT uses 24-QFN (4x4) packaging. LP8860 substitutes require 32-HLQFP (7x7) package footprint, necessitating PCB redesign. MP3398 variants use 16-TSSOP-EP, a significantly smaller package. Pin assignments and thermal characteristics differ; schematic and layout modifications are required for any substitute implementation.

Q: Do all substitute parts meet automotive qualification requirements?

A: LP8860BQVFPRQ1 and LP8860CQVFPRQ1 carry AEC-Q100 automotive qualification, matching the automotive-grade status of SC5012QMLTRT. MP3398AGF and MP3398BGF do not specify automotive qualification in provided documentation. For automotive applications, LP8860 variants are the appropriate choice.

Q: What is the supply voltage compatibility range across all parts?

A: SC5012QMLTRT operates 4.5V to 45V. LP8860 series operates 3V to 48V, providing broader lower-voltage capability. MP3398 series operates 5V to 28V, which is more restrictive. For designs operating above 28V supply, only SC5012QMLTRT or LP8860 series are suitable.

Q: Are all substitute parts RoHS and REACH compliant?

A: All substitute parts (LP8860BQVFPRQ1, LP8860CQVFPRQ1, MP3398AGF, MP3398BGF) are ROHS3 compliant. LP8860 variants specify REACH unaffected status. MP3398 variants also specify REACH unaffected status. The original SC5012QMLTRT is RoHS compliant (not ROHS3).

Q: What is the significance of "Not For New Designs" status on SC5012QMLTRT?

A: This designation indicates the manufacturer no longer recommends the part for new product development and may discontinue production. All identified substitutes carry active product status, ensuring continued availability and manufacturer support for new designs.