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MPQ2483DQ-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MPQ2483DQ-LF-Z is a LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 1-output DC-DC regulator supporting both step-down (buck) and step-up (boost) topologies with analog and PWM dimming capabilities. The part is rated for automotive applications with an operating temperature range of -40°C to 125°C (TJ) and is packaged in a 10-QFN (3x3) format.
The MPQ2483DQ-LF-Z carries a product status of "Not For New Designs," indicating it is obsolete or being phased out. This status necessitates identification of equivalent and substitute parts for ongoing production support, maintenance, and new design alternatives. Substitute parts must maintain compatibility across critical electrical parameters including supply voltage range (4.5V to 55V), switching frequency (1.35MHz), dimming capability (analog and PWM), and automotive-grade qualification.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Part Number | MPQ2483DQ-LF-Z |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Down (Buck), Step-Up (Boost) |
| Package | 10-QFN (3x3) |
| Voltage Supply (Min) | 4.5V |
| Voltage Supply (Max) | 55V |
| Frequency | 1.35MHz |
| Dimming | Analog, PWM |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | Automotive |
| Product Status | Not For New Designs |
| RoHS Status | ROHS3 Compliant |
| MSL | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the MPQ2483DQ-LF-Z are categorized based on the following substitution criteria:
Primary Substitution Parameters:
- Supply voltage range: 4.5V to 55V minimum compatibility
- Topology: Step-down (buck) and step-up (boost) capability
- Dimming: Analog and PWM support
- Package: 10-QFN (3x3) form factor
- Switching frequency: 1.35MHz nominal operation
- Automotive grade qualification
- Operating temperature: -40°C to 125°C or higher
Grouping Logic:
-
Parametric Equivalents (Same Base Series): Parts sharing the MPQ2483 base product number with identical electrical specifications but different packaging designations (LF-P, AEC1 variants).
-
Manufacturer Recommended Alternatives: Active production parts from the same manufacturer (Monolithic Power Systems) offering equivalent functionality with updated product status and potentially enhanced specifications.
-
Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Renesas, Texas Instruments, Analog Devices) meeting the core electrical and thermal requirements while maintaining automotive qualification.
-
Functional Alternatives: Parts with compatible topologies and dimming capabilities but potentially different package formats or frequency ranges, suitable for applications where package flexibility exists.
Parameter Comparison
| Part Number | Manufacturer | Topology | Package | Voltage Supply (Min-Max) | Frequency | Dimming | Operating Temp | Product Status | Automotive Grade |
|---|---|---|---|---|---|---|---|---|---|
| MPQ2483DQ-LF-Z | MPS | Buck/Boost | 10-QFN (3x3) | 4.5V - 55V | 1.35MHz | Analog, PWM | -40°C ~ 125°C (TJ) | Not For New Designs | Yes |
| MP2483DQ-LF-P | MPS | Buck/Boost | 10-QFN (3x3) | 4.5V - 55V | 500kHz | Analog, PWM | -40°C ~ 85°C (TA) | Active | Yes |
| MPQ2483DQ-AEC1-LF-P | MPS | Buck/Boost | 10-QFN (3x3) | 4.5V - 55V | 1.35MHz | Analog, PWM | -40°C ~ 125°C (TJ) | Not For New Designs | Yes (AEC-Q100) |
| MPQ2483DQ-AEC1-LF-Z | MPS | Buck/Boost | 10-QFN (3x3) | 4.5V - 55V | 1.35MHz | Analog, PWM | -40°C ~ 125°C (TJ) | Not For New Designs | Yes (AEC-Q100) |
| MPQ2483DQ-LF-P | MPS | Buck/Boost | 10-QFN (3x3) | 4.5V - 55V | 1.35MHz | Analog, PWM | -40°C ~ 125°C (TJ) | Not For New Designs | Yes |
| ISL78100ARZ | Renesas | Buck/Boost | 20-QFN (4x4) | 2.7V - 16V | 1MHz | Analog, PWM | -40°C ~ 105°C (TA) | Active | Yes (AEC-Q100) |
| LM3402MM/NOPB | Texas Instruments | Buck | 8-VSSOP | 6V - 42V | 1MHz | PWM | -40°C ~ 125°C (TJ) | Active | No |
| LT3478IFE#PBF | Analog Devices | Buck/Boost | 16-TSSOP-EP | 2.8V - 36V | 200kHz ~ 2.25MHz | PWM | -40°C ~ 125°C (TJ) | Active | No |
| LT3518HFE#PBF | Analog Devices | Buck/Boost | 16-TSSOP-EP | 3V - 30V | 250kHz ~ 2.5MHz | Analog, PWM | -40°C ~ 150°C (TJ) | Active | No |
| LT3518HUF#TRPBF | Analog Devices | Buck/Boost | 16-QFN (4x4) | 3V - 30V | 250kHz ~ 2.5MHz | Analog, PWM | -40°C ~ 150°C (TJ) | Active | No |
| LTC3215EDD#TRPBF | Analog Devices | Switched Capacitor | 10-DFN (3x3) | 2.9V - 4.4V | 900kHz | No Dimming | -40°C ~ 85°C (TA) | Active | No |
Engineering Selection Recommendations
Direct Parametric Equivalents (Recommended for Existing Designs):
The MPQ2483DQ-AEC1-LF-Z and MPQ2483DQ-AEC1-LF-P variants are direct parametric equivalents of the MPQ2483DQ-LF-Z, maintaining identical electrical specifications (4.5V to 55V supply, 1.35MHz frequency, analog and PWM dimming). These parts carry AEC-Q100 automotive qualification, providing enhanced reliability documentation. Both remain in "Not For New Designs" status, indicating they are being phased out alongside the original part.
Active Production Alternatives (Recommended for New Designs):
The MP2483DQ-LF-P from Monolithic Power Systems is the manufacturer-recommended active alternative. This part maintains the same supply voltage range (4.5V to 55V), package format (10-QFN 3x3), and dimming capabilities (analog and PWM). The primary difference is reduced switching frequency (500kHz versus 1.35MHz) and operating temperature range limited to -40°C to 85°C (TA). This part is actively produced and suitable for new designs.
Cross-Manufacturer Alternatives:
The ISL78100ARZ (Renesas) offers active production status with AEC-Q100 qualification and buck/boost topology with analog and PWM dimming. However, it operates at a lower supply voltage range (2.7V to 16V) and uses a larger 20-QFN (4x4) package, making it suitable only for applications with compatible voltage requirements and PCB layout flexibility.
The LT3518HFE#PBF and LT3518HUF#TRPBF (Analog Devices) provide active production alternatives with extended operating temperature to 150°C (TJ) and analog/PWM dimming support. The LT3518HUF#TRPBF maintains a 16-QFN package format. Both operate at reduced supply voltage (3V to 30V) and are not automotive-qualified, limiting their use to non-automotive applications or designs with relaxed qualification requirements.
The LM3402MM/NOPB (Texas Instruments) is an active alternative supporting the full operating temperature range (-40°C to 125°C TJ) but offers only buck topology (no boost), PWM-only dimming, and lacks automotive qualification.
Topology and Voltage Considerations:
The LTC3215EDD#TRPBF uses switched-capacitor topology unsuitable for the buck/boost requirements of the original part and operates only at 2.9V to 4.4V supply voltage. This part is not recommended as a substitute.
Frequently Asked Questions (FAQ)
Q: Can I use MP2483DQ-LF-P as a direct replacement for MPQ2483DQ-LF-Z?
A: MP2483DQ-LF-P is the manufacturer-recommended active alternative and maintains compatibility across supply voltage (4.5V to 55V), package (10-QFN 3x3), and dimming capabilities (analog and PWM). The switching frequency is reduced from 1.35MHz to 500kHz, and the operating temperature range is limited to -40°C to 85°C (TA) versus -40°C to 125°C (TJ). Verify that your application's thermal and frequency requirements are met before substitution.
Q: What is the difference between MPQ2483DQ-LF-Z and MPQ2483DQ-AEC1-LF-Z?
A: Both parts are parametric equivalents with identical electrical specifications (4.5V to 55V supply, 1.35MHz frequency, analog and PWM dimming, -40°C to 125°C operating temperature). The AEC1 variant includes AEC-Q100 automotive qualification documentation. Both carry "Not For New Designs" status. The AEC1 variant provides enhanced qualification traceability for automotive applications.
Q: Why does ISL78100ARZ have a different package size?
A: The ISL78100ARZ uses a 20-QFN (4x4) package compared to the 10-QFN (3x3) of the MPQ2483DQ-LF-Z. This larger package accommodates additional internal circuitry and may require PCB layout modifications. The ISL78100ARZ also operates at a lower supply voltage range (2.7V to 16V), making it suitable only for applications with compatible voltage requirements.
Q: Can I use LT3518HFE#PBF in an automotive application?
A: The LT3518HFE#PBF is not automotive-qualified and lacks AEC-Q100 certification. It is suitable only for non-automotive applications or designs where automotive qualification is not required. For automotive applications, use MPQ2483DQ-AEC1 variants or ISL78100ARZ (Renesas, AEC-Q100 qualified).
Q: What are the key parameters that determine substitutability?
A: Substitutability is determined by: (1) supply voltage range compatibility (minimum 4.5V to 55V), (2) topology support (buck and boost), (3) dimming capability (analog and PWM), (4) package format (10-QFN 3x3 preferred for direct replacement), (5) switching frequency (1.35MHz nominal), (6) operating temperature range (-40°C to 125°C or higher), and (7) automotive qualification for automotive applications.
Q: Is the LM3402MM/NOPB suitable as a substitute?
A: The LM3402MM/NOPB supports only buck topology (no boost capability) and PWM-only dimming (no analog dimming). It lacks automotive qualification. This part is suitable only for applications requiring buck-only operation with PWM dimming in non-automotive environments.
Q: What does "Not For New Designs" status mean?
A: "Not For New Designs" indicates the part is obsolete or being phased out by the manufacturer. Existing inventory may be available, but the manufacturer does not recommend using this part in new designs. For new designs, use active production alternatives such as MP2483DQ-LF-P or cross-manufacturer equivalents with active status.
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