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MPQ3369GR-AEC1-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MPQ3369GR-AEC1-Z is an active, automotive-grade LED driver IC manufactured by Monolithic Power Systems Inc. This device functions as a 6-output DC-DC regulator with step-up (boost) topology, delivering 100mA per channel output current with integrated PWM and analog dimming control. The part operates across a 3.5V to 36V supply range and is qualified to AEC-Q100 automotive standards with operating temperature range of -40°C to 125°C (TJ).
Equivalent and substitute parts are identified when design requirements necessitate alternative packaging formats, different inventory availability, or functional compatibility across the same electrical and mechanical specifications. This reference provides engineering-validated alternatives based on parametric equivalence and similar operational characteristics.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 6 |
| Voltage Supply Range | 3.5V to 36V |
| Output Voltage | 5V |
| Current per Channel | 100mA |
| Switching Frequency | 2.2MHz |
| Dimming Capability | Analog, PWM |
| Package Type | 24-VFQFN Exposed Pad (4x4) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to 125°C (TJ) |
| Grade | Automotive |
| Qualification | AEC-Q100 |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the MPQ3369GR-AEC1-Z are classified into two categories based on parametric alignment:
Parametric Equivalents maintain identical electrical specifications and package geometry while differing only in packaging format (Cut Tape vs. Tape & Reel) or qualification variant. These parts are direct functional replacements:
- MPQ3369GR-AEC1-P (Tape & Reel packaging variant)
- MPQ3369GR-P (Non-AEC qualified variant, Tape & Reel)
- MPQ3369GR-Z (Non-AEC qualified variant, Tape & Reel)
Similar Parts share the same core topology (Step-Up Boost LED Driver), 6-output configuration, and surface-mount package format but operate within different electrical parameter ranges. These parts are functionally compatible for LED driver applications but require design verification for specific voltage and current requirements:
- BD9422EFV-E2 (Rohm Semiconductor): 400mA per channel, 9V-35V supply, 40-HTSSOP package
- LP8545SQE/NOPB (Texas Instruments): 50mA per channel, 2.7V-22V supply, 24-WQFN package
- LP8556TME-E04/NOPB (Texas Instruments): 50mA per channel, 2.7V-20V supply, 20-DSBGA package
- LP8556TMX-E05/NOPB (Texas Instruments): 50mA per channel, 2.7V-20V supply, 20-DSBGA package
- LP8557IAYFQT (Texas Instruments): 25mA per channel, 2.7V-5.5V supply, 16-DSBGA package
- LT3598EUF#PBF (Analog Devices Inc.): 30mA per channel, 3V-30V supply, 24-QFN package
Substitution logic is based on matching: topology classification, number of outputs, package footprint compatibility, operating temperature range, and compliance certifications.
Parameter Comparison
| Part Number | Manufacturer | Topology | Outputs | Supply Voltage (Min-Max) | Output Current/Ch | Frequency | Dimming | Package | Temp Range | Grade | AEC-Q100 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MPQ3369GR-AEC1-Z | MPS | Step-Up | 6 | 3.5V-36V | 100mA | 2.2MHz | Analog, PWM | 24-VFQFN | -40°C to 125°C | Automotive | Yes |
| MPQ3369GR-AEC1-P | MPS | Step-Up | 6 | 3.5V-36V | 100mA | 2.2MHz | Analog, PWM | 24-VFQFN | -40°C to 125°C | Automotive | Yes |
| MPQ3369GR-P | MPS | Step-Up | 6 | 3.5V-36V | 100mA | 2.2MHz | Analog, PWM | 24-VFQFN | -40°C to 125°C | Automotive | No |
| MPQ3369GR-Z | MPS | Step-Up | 6 | 3.5V-36V | 100mA | 2.2MHz | Analog, PWM | 24-VFQFN | -40°C to 125°C | Automotive | No |
| BD9422EFV-E2 | Rohm | Step-Up | 6 | 9V-35V | 400mA | 500kHz | Analog, PWM | 40-HTSSOP | -40°C to 85°C | Industrial | No |
| LP8545SQE/NOPB | TI | Step-Up | 6 | 2.7V-22V | 50mA | 156kHz-1.25MHz | PWM | 24-WQFN | -30°C to 85°C | Industrial | No |
| LP8556TME-E04/NOPB | TI | Step-Up | 6 | 2.7V-20V | 50mA | 312kHz-1.25MHz | PWM | 20-DSBGA | -30°C to 85°C | Industrial | No |
| LP8556TMX-E05/NOPB | TI | Step-Up | 6 | 2.7V-20V | 50mA | 312kHz-1.25MHz | Not specified | 20-DSBGA | -30°C to 85°C | Industrial | No |
| LP8557IAYFQT | TI | Step-Up | 6 | 2.7V-5.5V | 25mA | 500kHz-1MHz | PWM | 16-DSBGA | -30°C to 85°C | Industrial | No |
| LT3598EUF#PBF | ADI | Step-Up | 6 | 3V-30V | 30mA | 200kHz-2.5MHz | Analog, PWM | 24-QFN | -40°C to 125°C | Automotive | No |
Engineering Selection Recommendations
Direct Parametric Equivalents (Recommended for Pin-Compatible Replacement)
MPQ3369GR-AEC1-P and MPQ3369GR-Z are parametric equivalents of MPQ3369GR-AEC1-Z with identical electrical specifications and package footprint. Selection between these variants depends on packaging format requirements:
- MPQ3369GR-AEC1-P: Tape & Reel format, maintains AEC-Q100 qualification, suitable for high-volume production environments
- MPQ3369GR-Z: Tape & Reel format, non-AEC qualified, suitable for non-automotive applications with identical electrical performance
MPQ3369GR-P is functionally equivalent but lacks AEC-Q100 qualification. This variant is suitable only for applications where automotive qualification is not required.
Automotive-Grade Alternative
LT3598EUF#PBF (Analog Devices Inc.) is the only alternative from the similar parts list that maintains automotive-grade classification and -40°C to 125°C operating temperature range. This part provides 30mA per channel output current and operates across 3V to 30V supply voltage. The 24-QFN package is footprint-compatible with the main part. This device includes both analog and PWM dimming capability and is suitable for automotive LED driver applications where the 100mA per channel specification of the MPQ3369GR-AEC1-Z can be reduced to 30mA per channel.
Industrial-Grade Alternatives
BD9422EFV-E2 (Rohm Semiconductor) provides higher output current capability (400mA per channel) but operates at lower supply voltage range (9V-35V) and reduced operating temperature range (-40°C to 85°C). The 40-HTSSOP package requires PCB layout modification. This part is suitable for high-current LED driver applications in industrial environments.
Texas Instruments LP8545SQE/NOPB, LP8556TME-E04/NOPB, LP8556TMX-E05/NOPB, and LP8557IAYFQT are industrial-grade alternatives with reduced output current specifications (25mA to 50mA per channel) and narrower supply voltage ranges. These parts are suitable for low-power LED driver applications where the 100mA per channel capability is not required.
All substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating consistent with the main part.
Frequently Asked Questions (FAQ)
Q: Can MPQ3369GR-AEC1-P be used as a direct replacement for MPQ3369GR-AEC1-Z?
A: Yes. MPQ3369GR-AEC1-P is a parametric equivalent with identical electrical specifications, package footprint, and AEC-Q100 qualification. The only difference is packaging format: MPQ3369GR-AEC1-Z is supplied in Cut Tape format while MPQ3369GR-AEC1-P is supplied in Tape & Reel format. Both parts are pin-compatible and functionally interchangeable.
Q: What is the difference between MPQ3369GR-AEC1-Z and MPQ3369GR-Z?
A: Both parts are identical in electrical specifications and package type (24-VFQFN). The primary difference is AEC-Q100 automotive qualification: MPQ3369GR-AEC1-Z includes AEC-Q100 qualification while MPQ3369GR-Z does not. For automotive applications, MPQ3369GR-AEC1-Z is the specified part. MPQ3369GR-Z is suitable for non-automotive applications with identical performance requirements.
Q: Can LT3598EUF#PBF replace the MPQ3369GR-AEC1-Z in automotive applications?
A: LT3598EUF#PBF maintains automotive-grade classification and identical operating temperature range (-40°C to 125°C). However, the output current per channel is 30mA compared to 100mA for the MPQ3369GR-AEC1-Z. This part is suitable for automotive LED driver applications where the lower current specification meets design requirements. The 24-QFN package is footprint-compatible. Design verification is required to confirm current capacity is sufficient for the target application.
Q: Why do Texas Instruments LP8556 and LP8557 parts have lower output current ratings?
A: The LP8556 series (50mA per channel) and LP8557 series (25mA per channel) are designed for lower-power LED driver applications, particularly in mobile and portable device backlighting. These parts operate across narrower supply voltage ranges (2.7V-20V or 2.7V-5.5V) optimized for battery-powered systems. The MPQ3369GR-AEC1-Z with 100mA per channel and 3.5V-36V supply range is designed for higher-power automotive and industrial LED applications.
Q: Is the 24-VFQFN package footprint compatible with 24-WQFN and 24-QFN packages?
A: The 24-VFQFN, 24-WQFN, and 24-QFN packages all have 4x4mm body dimensions and 0.5mm pitch. While the footprints are similar, verification of exact pad dimensions and exposed pad size is required before substitution. Consult device datasheets for precise footprint specifications.
Q: Can BD9422EFV-E2 be used as a substitute for higher current applications?
A: BD9422EFV-E2 provides 400mA per channel output current, which is 4 times higher than the MPQ3369GR-AEC1-Z. However, this part operates at reduced supply voltage range (9V-35V vs. 3.5V-36V) and lower operating temperature maximum (85°C vs. 125°C). The 40-HTSSOP package is significantly larger than the 24-VFQFN package and requires PCB layout redesign. This part is suitable only for applications where the higher current capability is required and the reduced temperature range and larger package are acceptable.
Q: What is the significance of AEC-Q100 qualification?
A: AEC-Q100 is an automotive industry qualification standard that certifies components for use in automotive applications. It includes testing for temperature cycling, humidity, electrostatic discharge, and other environmental stresses. For automotive applications, AEC-Q100 qualified parts (MPQ3369GR-AEC1-Z and LT3598EUF#PBF) are required. Non-qualified parts may not meet automotive reliability and safety standards.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All parts listed in this reference maintain ROHS3 compliance, indicating they are free of restricted substances (lead, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers) as specified in the Restriction of Hazardous Substances Directive.
Q: What does MSL-1 moisture sensitivity rating mean?
A: MSL-1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control. Parts with this rating do not require special moisture-controlled storage or handling procedures. All parts in this reference carry MSL-1 rating, ensuring consistent handling requirements across substitution options.
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