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MPQ2489DQ-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MPQ2489DQ-LF-Z is an active 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 with step-down (buck) topology, delivering 550mA output current with analog and PWM dimming capabilities. The part operates across a 6V to 55V supply range at 600kHz switching frequency and is qualified to AEC-Q100 automotive standards with operating temperature range of -40°C to 125°C. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter specifications for LED driver applications including backlight, lighting, and signage.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Part Number | MPQ2489DQ-LF-Z |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Down (Buck) |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 6V |
| Voltage Supply (Max) | 55V |
| Current Output / Channel | 550mA |
| Switching Frequency | 600kHz |
| Dimming | Analog, PWM |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | 6-VDFN Exposed Pad |
| Grade | Automotive |
| Qualification | AEC-Q100 |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the MPQ2489DQ-LF-Z are selected based on the following critical parameters that determine functional equivalence:
Primary Substitution Criteria:
- DC-DC Regulator topology: Step-Down (Buck) configuration
- Single output channel
- Output current capability: 550mA or greater
- Supply voltage range: Minimum 6V, maximum 40V or higher
- Dimming capability: Analog and/or PWM support
- Operating temperature range: -40°C minimum, 125°C or higher maximum
- Internal switch integration
- Surface mount packaging
- Active product status
- RoHS3 compliance
Secondary Compatibility Factors:
- Automotive grade qualification (preferred but not mandatory for all substitutes)
- AEC-Q100 certification (preferred for automotive applications)
- Moisture sensitivity level 1 or 3 (168 hours)
- Package form factor compatibility with PCB layout constraints
Substitutes are grouped by output current capability and supply voltage range to facilitate selection based on specific application requirements.
Parameter Comparison
| Parameter | MPQ2489DQ-LF-Z | AL8860WT-7 | AL8861Y-13 | AP8802HSP-13 | IS31LT3352-V1GRLS2-TR | LED2001PHR | LM3402MRX/NOPB | LM3406MH/NOPB | LM3407MY/NOPB | LM3410XQMF/NOPB | LM3414MR/NOPB |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | MPS | Diodes Inc. | Diodes Inc. | Diodes Inc. | Lumissil | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Topology | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | SEPIC, Step-Up (Boost) | Step-Down (Buck) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply (Min) | 6V | 4.5V | 4.5V | 8V | 6V | 3V | 6V | 6V | 4.5V | 2.7V | 4.5V |
| Voltage Supply (Max) | 55V | 40V | 40V | 60V | 40V | 18V | 42V | 42V | 30V | 5.5V | 42V |
| Current Output / Channel | 550mA | 1A | 1.5A | 1A (Switch) | 750mA | 4A | 500mA | 1.5A | 350mA | 2.8A (Switch) | 1A |
| Switching Frequency | 600kHz | 1MHz | 1MHz | 700kHz | 1MHz | 850kHz | 1MHz | 10kHz ~ 1MHz | 300kHz ~ 1MHz | 1.6MHz | 500kHz |
| Dimming | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM | PWM | PWM | PWM | PWM | PWM | Analog, PWM |
| Operating Temperature (Min) | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C | -40°C |
| Operating Temperature (Max) | 125°C (TJ) | 105°C (TA) | 85°C (TA) | 125°C (TA) | 85°C (TA) | 150°C (TJ) | 125°C (TJ) | 125°C (TJ) | 125°C (TJ) | 125°C (TJ) | 125°C (TJ) |
| Internal Switch | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Package / Case | 6-VDFN Exposed Pad | SOT-23-5 Thin, TSOT-23-5 | SOT-89-5/6 | 8-SOIC (0.154", 3.90mm Width) Exposed Pad | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) Exposed Pad | 8-PowerSOIC (0.154", 3.90mm Width) | 14-PowerTSSOP (0.173", 4.40mm Width) | 8-PowerTSSOP, 8-MSOP (0.118", 3.00mm Width) | SC-74A, SOT-753 | 8-PowerSOIC (0.154", 3.90mm Width) |
| Grade | Automotive | - | - | - | - | - | - | Automotive | - | Automotive | Automotive |
| Qualification | AEC-Q100 | - | - | - | - | - | - | - | - | AEC-Q100 | - |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Tier 1 - Highest Compatibility (Automotive Grade, AEC-Q100):
LM3410XQMF/NOPB and LM3406MH/NOPB both carry automotive grade designation and AEC-Q100 qualification matching the MPQ2489DQ-LF-Z. LM3410XQMF/NOPB operates with SEPIC/boost topology and lower supply voltage range (2.7V to 5.5V), suitable for backlight applications with different input requirements. LM3406MH/NOPB maintains step-down buck topology with 1.5A output current and 6V to 42V supply range, directly compatible with automotive lighting applications.
Tier 2 - High Compatibility (Active Status, RoHS3, Temperature Range -40°C to 125°C):
LM3402MRX/NOPB, LM3407MY/NOPB, and LM3414MR/NOPB are Texas Instruments devices with active product status and full temperature range support. LM3402MRX/NOPB delivers 500mA at 1MHz with 6V to 42V supply. LM3407MY/NOPB provides 350mA with adjustable frequency (300kHz to 1MHz) and 4.5V to 30V supply. LM3414MR/NOPB offers 1A output with analog and PWM dimming across 4.5V to 42V supply range.
Tier 3 - Functional Equivalence (Active Status, RoHS3, Buck Topology):
AL8860WT-7, AL8861Y-13, AP8802HSP-13, IS31LT3352-V1GRLS2-TR, and LED2001PHR provide functional buck regulator operation with active product status and RoHS3 compliance. AL8860WT-7 and AL8861Y-13 from Diodes Incorporated deliver 1A and 1.5A respectively with 4.5V to 40V supply and analog/PWM dimming. AP8802HSP-13 supports higher supply voltage (8V to 60V) with 1A output. IS31LT3352-V1GRLS2-TR provides 750mA at 1MHz with 6V to 40V supply. LED2001PHR from STMicroelectronics offers 4A output with PWM dimming and extended temperature range to 150°C but operates at lower supply voltage (3V to 18V).
Selection Criteria by Application:
For automotive lighting requiring AEC-Q100 qualification, select LM3410XQMF/NOPB or LM3406MH/NOPB. For general lighting and signage with standard industrial requirements, select from Tier 2 devices. For cost-optimized designs with non-automotive applications, select from Tier 3 devices matching specific output current and supply voltage requirements.
Frequently Asked Questions (FAQ)
Q: Can AL8860WT-7 directly replace MPQ2489DQ-LF-Z in automotive applications?
A: AL8860WT-7 is functionally equivalent for buck regulator operation with 1A output current and analog/PWM dimming. However, it lacks automotive grade designation and AEC-Q100 qualification. For automotive applications requiring these certifications, use LM3406MH/NOPB or LM3410XQMF/NOPB instead.
Q: What is the key difference between LM3407MY/NOPB and LM3414MR/NOPB?
A: LM3407MY/NOPB delivers 350mA with adjustable frequency range (300kHz to 1MHz) and operates at 4.5V to 30V supply. LM3414MR/NOPB delivers 1A with fixed 500kHz frequency and operates at 4.5V to 42V supply. Select LM3414MR/NOPB for higher current requirements and wider supply voltage range.
Q: Is LM3410XQMF/NOPB suitable as a substitute for backlight applications?
A: Yes. LM3410XQMF/NOPB is specifically designed for backlight applications with SEPIC/boost topology, enabling operation from lower supply voltages (2.7V to 5.5V). It carries AEC-Q100 qualification and automotive grade designation. However, its topology differs from the MPQ2489DQ-LF-Z buck configuration, requiring circuit redesign.
Q: What packaging considerations apply when substituting the 6-VDFN package?
A: The MPQ2489DQ-LF-Z uses 6-VDFN exposed pad packaging. Substitute parts use different packages: SOT-23-5, SOT-89-5, 8-SOIC, 8-SOIC-EP, 8-HVSSOP, 8-PowerSOIC, 14-PowerTSSOP, and SC-74A. PCB layout modifications are required for any package change. Verify thermal performance and current distribution capabilities with the new package form factor.
Q: Does LED2001PHR support the full supply voltage range of MPQ2489DQ-LF-Z?
A: No. LED2001PHR operates at 3V to 18V supply, which is narrower than the MPQ2489DQ-LF-Z range of 6V to 55V. LED2001PHR is suitable only for applications within the 6V to 18V range. For applications requiring 18V to 55V operation, select AP8802HSP-13 (8V to 60V) or other higher-voltage rated devices.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts are RoHS3 compliant, matching the MPQ2489DQ-LF-Z compliance status.
Q: Which substitute offers the highest output current capability?
A: LED2001PHR from STMicroelectronics provides 4A output current, the highest among all listed substitutes. However, it operates at lower supply voltage (3V to 18V) and uses PWM-only dimming without analog dimming support.
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