MP3378EGF LED Driver IC - Equivalent & Substitute Parts

Part Overview

The MP3378EGF is a 4-output LED driver controller IC manufactured by Monolithic Power Systems Inc., designed for backlight applications requiring step-down (buck) topology conversion. This part operates across a 5V to 24V supply range with 350mA per-channel output capability and supports both analog and PWM dimming control. The device is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications.

Substiute Parts

MP3378EGF

Monolithic Power Systems Inc.In Stock: 995MP3378EGF Datasheet

Current PartRFQ

MP3378GF

Monolithic Power Systems Inc.In Stock: 841MP3378GF Datasheet

Parametric EquivalentRFQ

SC5012QMLTRT

Semtech CorporationIn Stock: 16090SC5012QMLTRT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the MP3378EGF is based on the following critical parameters that define functional compatibility:

Primary Substitution Criteria:

• Number of outputs (4 channels required)
• Dimming capability (Analog and PWM support)
• Supply voltage range (5V to 24V minimum requirement)
• Per-channel current output (350mA minimum)
• DC DC controller topology classification
• Surface mount packaging compatibility
• Operating temperature range (-40°C to 125°C minimum)
• RoHS and REACH compliance status

Two substitute parts are identified based on these parameters:

MP3378GF - Parametric equivalent from the same manufacturer series, maintaining identical electrical specifications and package format with active product status.

SC5012QMLTRT - Manufacturer-recommended alternative from Semtech Corporation, offering different topology (step-up/boost) and package format (24-QFN) with extended supply voltage range and automotive-grade qualification.

Parameter Comparison

Engineering Selection Recommendations

MP3378GF Selection Rationale: The MP3378GF represents the direct parametric equivalent to the MP3378EGF, maintaining identical electrical specifications, package format, and thermal characteristics. This part is currently in active product status, ensuring availability for procurement and long-term supply chain stability. Both parts share the same base product number (MP3378) and are manufactured by Monolithic Power Systems Inc. with equivalent RoHS3 compliance and moisture sensitivity ratings. Selection of MP3378GF is appropriate for direct replacement in existing designs without circuit modification.

SC5012QMLTRT Selection Rationale: The SC5012QMLTRT is designated as the manufacturer-recommended alternative and offers extended supply voltage capability (4.5V to 45V) with automotive-grade qualification. However, this part operates on step-up (boost) topology rather than step-down (buck) topology and delivers 150mA per channel versus 350mA on the original part. The package format differs (24-QFN versus 28-TSSOP), requiring PCB layout redesign. This part is classified as "Not For New Designs" by Semtech Corporation. Selection of SC5012QMLTRT requires circuit topology evaluation and is suitable only for applications where boost conversion and reduced per-channel current are acceptable.

Frequently Asked Questions (FAQ)

Q: Can MP3378GF be used as a direct replacement for MP3378EGF? A: Yes. The MP3378GF maintains identical electrical specifications, package format, and thermal operating range. No circuit modifications are required for substitution.

Q: What is the primary difference between MP3378EGF and SC5012QMLTRT? A: The SC5012QMLTRT uses step-up (boost) topology versus the step-down (buck) topology of MP3378EGF. Additionally, SC5012QMLTRT delivers 150mA per channel compared to 350mA, operates at a lower maximum temperature (105°C versus 125°C), and requires a different package footprint (24-QFN versus 28-TSSOP).

Q: Is SC5012QMLTRT recommended for new designs? A: No. Semtech Corporation classifies SC5012QMLTRT as "Not For New Designs." This designation indicates the part is in mature or declining production status.

Q: What packaging considerations apply to SC5012QMLTRT substitution? A: SC5012QMLTRT uses 24-QFN (4x4) packaging versus the 28-TSSOP exposed pad package of MP3378EGF. PCB layout redesign is required, including different pad pitch, via placement, and thermal management approach.

Q: Are all substitute parts RoHS compliant? A: Yes. MP3378GF carries ROHS3 compliance identical to MP3378EGF. SC5012QMLTRT carries RoHS compliance. All parts meet regulatory requirements for restricted substance elimination.

Q: What is the current availability status of substitute parts? A: MP3378GF is in active product status with 756 pcs in stock. SC5012QMLTRT is not recommended for new designs but has 16,000 pcs available in inventory.