MPQ3386DR-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MPQ3386DR-LF-P is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This 6-output DC-DC regulator features step-up (boost) topology with PWM dimming capability, designed for backlight applications in automotive-grade systems. The part is AEC-Q100 qualified and ROHS3 compliant, with an operating temperature range of -40°C to 125°C (TJ). Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part's specifications, enabling direct replacement in circuit designs where supply voltage, output voltage, output count, topology, and dimming method remain compatible.

Substiute Parts

MPQ3386DR-LF-P

Monolithic Power Systems Inc.In Stock: 1228MPQ3386DR-LF-P Datasheet

Current PartRFQ

MPQ3386DR-AEC1-LF-P

Monolithic Power Systems Inc.In Stock: 945MPQ3386DR-AEC1-LF-P Datasheet

Parametric EquivalentRFQ

MPQ3386DR-AEC1-LF-Z

Monolithic Power Systems Inc.In Stock: 740MPQ3386DR-AEC1-LF-Z Datasheet

Parametric EquivalentRFQ

ALED7707TR

STMicroelectronicsIn Stock: 33404ALED7707TR Datasheet

MFR RecommendedRFQ

ISL78171ARZ-T7A

Renesas Electronics CorporationIn Stock: 1249ISL78171ARZ-T7A Datasheet

MFR RecommendedRFQ

ISL97671AIRZ-T

Renesas Electronics CorporationIn Stock: 8100ISL97671AIRZ-T Datasheet

MFR RecommendedRFQ

LP8556TMX-E11/NOPB

Texas InstrumentsIn Stock: 9360LP8556TMX-E11/NOPB Datasheet

MFR RecommendedRFQ

LT3598EUF#TRPBF

Analog Devices Inc.In Stock: 1410LT3598EUF#TRPBF Datasheet

MFR RecommendedRFQ

LT3598IUF#PBF

Analog Devices Inc.In Stock: 1482LT3598IUF#PBF Datasheet

MFR RecommendedRFQ

TPS61183RTJR

Texas InstrumentsIn Stock: 26242TPS61183RTJR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on substitution criteria:

Parametric Equivalents (Direct Substitutes): Parts sharing identical electrical specifications with the MPQ3386DR-LF-P, including 6 outputs, step-up topology, 4.5V–25V supply range, 50V output voltage, 1.25MHz frequency, PWM dimming, automotive grade, AEC-Q100 qualification, and 24-QFN (4x4) package. These parts differ only in packaging format (Tape & Reel vs. Tube) or internal qualification suffix, allowing direct circuit replacement without design modification.

Manufacturer Recommended Alternatives: Parts with compatible but non-identical parameters. Substitution eligibility is determined by the following criteria:

• Topology: Step-Up (Boost) required
• Number of Outputs: 6 outputs required
• Dimming Method: PWM or PWM-compatible (PWM + Analog, PWM + I2C acceptable)
• Supply Voltage Range: Minimum 4.5V; maximum ≥25V
• Output Voltage: ≥50V or within application tolerance
• Automotive Grade and AEC-Q100 qualification required
• Package Type: Surface mount QFN variants acceptable

Parts failing to meet all criteria are excluded from substitution consideration.

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent Selection (MPQ3386DR-AEC1-LF-P, MPQ3386DR-AEC1-LF-Z): These parts are direct substitutes for the MPQ3386DR-LF-P, maintaining identical electrical specifications and automotive-grade AEC-Q100 qualification. Selection between these variants depends on packaging requirements: MPQ3386DR-AEC1-LF-P is supplied in Tape & Reel format, while MPQ3386DR-AEC1-LF-Z is also Tape & Reel. Both support immediate circuit replacement without design modification.

Manufacturer Recommended Alternatives: Selection of alternative parts requires evaluation of specific application constraints:

ALED7707TR (STMicroelectronics) meets all substitution criteria with extended supply voltage range (4.5V–36V) and higher operating temperature ceiling (-40°C to 150°C TJ). Output voltage is limited to 36V, requiring application compatibility assessment. Package footprint differs (24-QFN 5x5 vs. 4x4), necessitating PCB layout modification.

ISL78171ARZ-T7A (Renesas) and ISL97671AIRZ-T (Renesas) provide 6-output step-up topology with PWM dimming and automotive qualification. ISL78171ARZ-T7A supports multi-mode dimming (Analog, I2C, PWM) with 40V output; ISL97671AIRZ-T provides PWM-only dimming with 45V output. Both use 20-QFN (3x4) packages, requiring PCB redesign. Operating temperature ranges are lower than the main part.

TPS61183RTJR (Texas Instruments) is automotive-grade AEC-Q100 qualified with PWM dimming and 4.5V–24V supply range. Output voltage is 38V, and package is 20-WFQFN (4x4), differing from the main part's 24-QFN footprint.

LP8556TMX-E11/NOPB (Texas Instruments), LT3598EUF#TRPBF, and LT3598IUF#PBF lack automotive-grade designation or AEC-Q100 qualification, making them unsuitable for automotive applications requiring these certifications.

Frequently Asked Questions (FAQ)

Q: Can MPQ3386DR-AEC1-LF-P directly replace MPQ3386DR-LF-P without circuit modification?

A: Yes. Both parts share identical electrical specifications, topology, output count, supply voltage range, output voltage, frequency, and dimming method. The difference is packaging format (Tape & Reel). No circuit redesign is required.

Q: What is the primary difference between parametric equivalents and manufacturer recommended alternatives?

A: Parametric equivalents (MPQ3386DR-AEC1-LF-P, MPQ3386DR-AEC1-LF-Z) maintain all electrical and mechanical specifications of the main part, differing only in packaging or qualification suffix. Manufacturer recommended alternatives have one or more parameter variations—such as output voltage, supply range, package footprint, or operating temperature—requiring application-level compatibility assessment.

Q: Can ALED7707TR be used as a direct substitute?

A: ALED7707TR meets core substitution criteria (6 outputs, step-up topology, PWM dimming, automotive grade, AEC-Q100 qualification). However, output voltage is 36V versus 50V for the main part, and package footprint is 24-QFN (5x5) versus 24-QFN (4x4). PCB layout modification is required, and output voltage compatibility must be confirmed for the specific application.

Q: Why are LP8556TMX-E11/NOPB, LT3598EUF#TRPBF, and LT3598IUF#PBF not recommended for automotive applications?

A: These parts lack automotive-grade designation or AEC-Q100 qualification. Automotive applications requiring AEC-Q100 compliance cannot use these alternatives.

Q: What package considerations apply when selecting alternatives?

A: The main part uses 24-VFQFN (4x4) package. ALED7707TR uses 24-VQFN (5x5); ISL78171ARZ-T7A and ISL97671AIRZ-T use 20-VFQFN (3x4); TPS61183RTJR uses 20-WFQFN (4x4); LP8556TMX-E11/NOPB uses 20-DSBGA (2.04x1.78). Different packages require PCB footprint redesign and layout recalculation.

Q: Are there supply voltage compatibility constraints when selecting alternatives?

A: Yes. The main part operates at 4.5V–25V. ALED7707TR extends to 36V; ISL78171ARZ-T7A and ISL97671AIRZ-T extend to 26.5V; LT3598 variants extend to 30V; LP8556TMX-E11/NOPB operates at 2.7V–20V. Application power supply specifications must align with the selected alternative's supply range.

Q: What is the significance of dimming method compatibility?

A: The main part uses PWM-only dimming. Alternatives offering PWM + Analog or PWM + I2C are compatible, as PWM functionality is preserved. Parts offering only Analog or I2C dimming without PWM are not compatible.