MP3394SGS-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3394SGS-Z is a 4-output LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a DC-DC controller with Step-Up (Boost) topology, delivering 180mA per channel output current at a switching frequency of 670kHz. The IC is designed for backlight applications and operates across a supply voltage range of 5V to 28V with PWM dimming capability. The part is currently in Active product status with 17,900 units in stock.

Equivalent and substitute parts are identified based on matching functional topology, output configuration, dimming methodology, and operating parameter ranges that permit direct or near-direct replacement in target applications.

Substiute Parts

MP3394SGS-Z

Monolithic Power Systems Inc.In Stock: 17983MP3394SGS-Z Datasheet

Current PartRFQ

ISL97687IBZ-T

Renesas Electronics CorporationIn Stock: 1185ISL97687IBZ-T Datasheet

MFR RecommendedRFQ

LP8860AQVFPRQ1

Texas InstrumentsIn Stock: 6121LP8860AQVFPRQ1 Datasheet

MFR RecommendedRFQ

SC5012QMLTRT

Semtech CorporationIn Stock: 16090SC5012QMLTRT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3394SGS-Z are selected based on the following critical parameters that determine functional compatibility:

Core Substitution Criteria:

• Topology: Step-Up (Boost) DC-DC controller architecture
• Output Configuration: 4-output LED driver IC
• Dimming Capability: PWM or PWM + Analog dimming support
• Supply Voltage Range: Overlap or extension of 5V–28V input range
• Output Current per Channel: Equal to or greater than 180mA
• Applications: Backlight or backlight-compatible use cases
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

The three substitute parts identified—ISL97687IBZ-T, LP8860AQVFPRQ1, and SC5012QMLTRT—meet these core criteria while offering variations in package form factor, frequency range, temperature rating, and additional certifications.

Parameter Comparison

Engineering Selection Recommendations

ISL97687IBZ-T (Renesas Electronics Corporation)

This substitute is suitable for applications where the supply voltage minimum requirement of 9V is acceptable. The ISL97687IBZ-T provides a wider maximum supply voltage (32V) and supports both analog and PWM dimming modes, offering greater flexibility than the MP3394SGS-Z. The output current per channel is 160mA, which is 20mA lower than the original part. The 28-SOIC package is larger than the 16-SOIC of the MP3394SGS-Z, requiring PCB layout modification. Product status is Active. MSL rating of 3 (168 Hours) requires shorter storage and handling protocols compared to the original part's MSL 2 rating.

LP8860AQVFPRQ1 (Texas Instruments)

This substitute offers the widest supply voltage range (3V to 48V) and the lowest minimum supply voltage (3V), making it suitable for applications requiring extended input voltage flexibility. The LP8860AQVFPRQ1 maintains the same operating temperature range as the MP3394SGS-Z (-40°C to 125°C) and includes automotive-grade qualification (AEC-Q100). Output current per channel is 150mA. The 32-PowerLQFP package is significantly larger than the 16-SOIC, requiring substantial PCB redesign. Product status is Active. MSL rating of 2 (1 Year) matches the original part.

SC5012QMLTRT (Semtech Corporation)

This substitute provides a wide supply voltage range (4.5V to 45V) and supports both analog and PWM dimming. The 24-QFN (4x4) package is more compact than the 28-SOIC and 32-PowerLQFP alternatives. Output current per channel is 150mA. Operating temperature range is -40°C to 105°C, which is 20°C lower than the MP3394SGS-Z at the upper limit. Product status is listed as "Not For New Designs," indicating this part is in end-of-life phase and should not be selected for new product development. MSL rating of 1 (Unlimited) provides the most favorable moisture handling characteristics.

Frequently Asked Questions (FAQ)

Q: Can the ISL97687IBZ-T replace the MP3394SGS-Z in all applications?

A: The ISL97687IBZ-T is functionally compatible for backlight applications where the minimum supply voltage of 9V is met. The 20mA reduction in output current per channel (160mA vs. 180mA) must be evaluated against application load requirements. The larger 28-SOIC package requires PCB layout modification. The MSL 3 rating (168 Hours) requires stricter moisture control during storage and assembly compared to the original MSL 2 rating.

Q: What are the key differences between PWM-only and PWM + Analog dimming?

A: The MP3394SGS-Z supports PWM dimming only. The ISL97687IBZ-T and SC5012QMLTRT support both PWM and analog dimming modes. Applications requiring only PWM dimming can use any of the three substitutes. Applications requiring analog dimming capability must select ISL97687IBZ-T or SC5012QMLTRT.

Q: Why is SC5012QMLTRT marked as "Not For New Designs"?

A: The "Not For New Designs" status indicates the part is in end-of-life phase. While the part remains functionally available, manufacturers recommend against selecting it for new product development. For new designs, ISL97687IBZ-T or LP8860AQVFPRQ1 are preferred alternatives.

Q: How do package differences affect substitution?

A: The MP3394SGS-Z uses a 16-SOIC package. ISL97687IBZ-T uses 28-SOIC, LP8860AQVFPRQ1 uses 32-PowerLQFP, and SC5012QMLTRT uses 24-QFN (4x4). Each package change requires PCB layout redesign, including trace routing, via placement, and thermal management considerations. Package selection should be based on available PCB real estate and thermal requirements of the target application.

Q: What is the significance of the operating temperature range difference?

A: The MP3394SGS-Z operates to 125°C (junction temperature). ISL97687IBZ-T and SC5012QMLTRT operate to 105°C (ambient temperature). LP8860AQVFPRQ1 operates to 125°C (ambient temperature). Applications requiring operation at elevated ambient temperatures above 105°C should select MP3394SGS-Z or LP8860AQVFPRQ1.

Q: Are all substitute parts RoHS compliant?

A: Yes. MP3394SGS-Z, ISL97687IBZ-T, and LP8860AQVFPRQ1 are ROHS3 Compliant. SC5012QMLTRT is RoHS Compliant. Both designations indicate compliance with RoHS directives; ROHS3 represents the most current revision.

Q: What does MSL rating mean for component selection?

A: MSL (Moisture Sensitivity Level) indicates the maximum time a component can be stored in a non-controlled environment before assembly. MP3394SGS-Z and LP8860AQVFPRQ1 have MSL 2 (1 Year). ISL97687IBZ-T has MSL 3 (168 Hours), requiring more frequent baking or shorter storage periods. SC5012QMLTRT has MSL 1 (Unlimited), requiring no moisture control. Selection depends on manufacturing environment and inventory management practices.