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MPQ2489DQ-LF-P LED Driver IC Equivalent & Substitute Parts
Part Overview
The MPQ2489DQ-LF-P 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 is qualified to AEC-Q100 automotive standards and operates across a 6V to 55V supply range, making it suitable for backlight, lighting, and signage applications. With 734 units in current stock and active product status, substitute parts may be required for design flexibility, supply chain optimization, or specific application requirements where alternative electrical or mechanical parameters are acceptable.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Part Number | MPQ2489DQ-LF-P |
| 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 |
| Frequency | 600kHz |
| Dimming | Analog, PWM |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | 6-VDFN Exposed Pad |
| Mounting Type | Surface Mount |
| Grade | Automotive |
| Qualification | AEC-Q100 |
| RoHS Status | ROHS3 Compliant |
| MSL | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the MPQ2489DQ-LF-P is determined by the following critical parameters:
Topology Requirement: All substitutes must employ step-down (buck) topology to maintain functional equivalence in voltage regulation architecture.
Output Configuration: Single-output requirement is mandatory; multi-output devices are not compatible.
Dimming Capability: Substitutes must support PWM dimming at minimum; analog and PWM dimming support is preferred for full feature compatibility.
Supply Voltage Range: Substitutes must accommodate the 6V minimum supply voltage. Devices with lower minimum supply ratings (4.5V, 3V, 2.7V) can operate within the MPQ2489DQ-LF-P's supply envelope but may not fully utilize the upper voltage range.
Current Output Rating: Substitutes with 500mA to 1.5A output current ratings are functionally compatible, as they can deliver the required 550mA within their rated specifications or operate at reduced capacity.
Package Compatibility: Surface-mount packages (6-QFN, 8-MSOP, 8-SOP, 8-SOIC, SOT-23-5, 14-HTSSOP) are acceptable; package selection depends on PCB layout constraints and thermal management requirements.
Automotive Grade & Compliance: AEC-Q100 qualification and ROHS3 compliance are maintained across all listed substitutes, ensuring regulatory and reliability standards alignment.
Parameter Comparison
| Parameter | MPQ2489DQ-LF-P | AL8860WT-7 | HV9967BMG-G | IS31LT3352-V1GRLS2-TR | LED2001PHR | LM3402MR/NOPB | LM3406MH/NOPB | LM3407MY/NOPB |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | MPS | Diodes Inc. | Microchip | Lumissil | STMicroelectronics | 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) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply (Min) | 6V | 4.5V | 8V | 6V | 3V | 6V | 6V | 4.5V |
| Voltage Supply (Max) | 55V | 40V | 60V | 40V | 18V | 42V | 42V | 30V |
| Current Output / Channel | 550mA | 1A | 750mA | 750mA | 4A | 500mA | 1.5A | 350mA |
| Frequency | 600kHz | 1MHz | — | 1MHz | 850kHz | 1MHz | 10kHz ~ 1MHz | 300kHz ~ 1MHz |
| Dimming | Analog, PWM | Analog, PWM | PWM | Analog, PWM | PWM | PWM | PWM | PWM |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 105°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Package / Case | 6-VDFN Exposed Pad | SOT-23-5 Thin, TSOT-23-5 | 8-TSSOP, 8-MSOP | 8-SOIC | 8-SOIC Exposed Pad | 8-PowerSOIC | 14-PowerTSSOP | 8-PowerTSSOP, 8-MSOP |
| Grade | Automotive | — | — | — | — | — | Automotive | — |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
AL8860WT-7 (Diodes Incorporated): This substitute offers higher output current (1A) and operates at 1MHz switching frequency. The 4.5V minimum supply voltage accommodates the MPQ2489DQ-LF-P's 6V baseline. However, the 40V maximum supply voltage limits operation in applications requiring the full 55V range. Suitable for designs where supply voltage does not exceed 40V and higher current capacity is beneficial.
HV9967BMG-G (Microchip Technology): This device provides 750mA output current and extends the maximum supply voltage to 60V, exceeding the MPQ2489DQ-LF-P's 55V rating. The 8V minimum supply voltage is above the original part's 6V baseline, restricting use in lower-voltage applications. Maintains automotive-grade reliability with -40°C to 125°C operating range. Suitable for high-voltage LED driver applications.
IS31LT3352-V1GRLS2-TR (Lumissil Microsystems): This substitute delivers 750mA output current with analog and PWM dimming support, matching the original part's dimming flexibility. The 6V to 40V supply range aligns with the lower portion of the MPQ2489DQ-LF-P's envelope. Operating temperature is limited to -40°C to 85°C, reducing thermal headroom compared to the original part. MSL rating of 3 requires controlled moisture exposure during storage and assembly.
LED2001PHR (STMicroelectronics): This device provides significantly higher output current (4A) and operates across a narrower 3V to 18V supply range. The 850kHz switching frequency and PWM-only dimming (no analog support) differ from the original part. Operating temperature extends to 150°C, providing superior thermal performance. Suitable for high-current LED applications within the 18V supply constraint.
LM3402MR/NOPB and LM3402MRX/NOPB (Texas Instruments): Both variants deliver 500mA output current with 1MHz switching frequency across a 6V to 42V supply range. PWM dimming only (no analog support). The 40V output voltage specification differs from the original part's unspecified output. Suitable for standard lighting applications with moderate current requirements. LM3402MRX/NOPB is tape-and-reel packaged with higher inventory availability (9400 units).
LM3406MH/NOPB (Texas Instruments): This substitute provides 1.5A output current with programmable frequency (10kHz to 1MHz) and PWM dimming. Maintains automotive grade qualification and AEC-Q100 certification. The 6V to 42V supply range is compatible with the original part's baseline. The 14-HTSSOP package is larger than the original 6-QFN, requiring PCB layout adjustment. Suitable for automotive lighting applications requiring higher current capacity.
LM3407MY/NOPB (Texas Instruments): This device delivers 350mA output current with programmable frequency (300kHz to 1MHz) and PWM dimming. The 4.5V to 30V supply range is narrower than the original part, limiting high-voltage applications. MSL rating of 1 (Unlimited) matches the original part's moisture sensitivity profile. Suitable for lower-current LED driver applications with flexible frequency tuning.
Frequently Asked Questions (FAQ)
Q: Can I use a substitute part with a lower maximum supply voltage than the MPQ2489DQ-LF-P?
A: Yes, if your application's actual supply voltage does not exceed the substitute's maximum rating. For example, AL8860WT-7 (40V max) is suitable for designs operating at 40V or below, even though the MPQ2489DQ-LF-P supports up to 55V. Verify your circuit's supply voltage specification before selection.
Q: What is the impact of using a substitute with PWM-only dimming instead of analog and PWM dimming?
A: PWM-only dimming devices (HV9967BMG-G, LED2001PHR, LM3402MR/NOPB, LM3406MH/NOPB, LM3407MY/NOPB) eliminate analog dimming control. If your design requires analog dimming, select substitutes offering both modes: AL8860WT-7 or IS31LT3352-V1GRLS2-TR.
Q: How does package size affect substitution?
A: The MPQ2489DQ-LF-P uses a compact 6-QFN package. Larger packages (8-MSOP, 8-SOIC, 14-HTSSOP) require PCB layout modifications, including different pad patterns and potentially increased board space. Verify PCB design compatibility before committing to a substitute with a different package.
Q: Are all listed substitutes automotive-grade qualified?
A: No. Only MPQ2489DQ-LF-P, HV9967BMG-G, and LM3406MH/NOPB carry explicit automotive grade designation. Other substitutes lack automotive qualification. For automotive applications requiring AEC-Q100 compliance, select HV9967BMG-G or LM3406MH/NOPB.
Q: What does MSL (Moisture Sensitivity Level) mean for component selection?
A: MSL indicates moisture exposure limits during storage and assembly. MSL 1 (Unlimited) allows indefinite dry storage. MSL 3 (168 Hours) requires controlled humidity storage and limits exposure to 168 hours at specified conditions before reflow soldering. IS31LT3352-V1GRLS2-TR and LED2001PHR have MSL 3 ratings, requiring stricter moisture control compared to the original part's MSL 1.
Q: Can I substitute the MPQ2489DQ-LF-P with a device rated for higher output current?
A: Yes. Devices rated for 750mA, 1A, 1.5A, or 4A can deliver the required 550mA. Higher-rated devices provide design margin and thermal headroom. However, verify that the substitute's supply voltage range, dimming capabilities, and package compatibility align with your application requirements.
Q: What is the difference between TJ (junction temperature) and TA (ambient temperature) operating ranges?
A: TJ (junction temperature) reflects the actual silicon temperature during operation, typically higher than ambient. TA (ambient temperature) reflects the surrounding air temperature. Devices specified with TJ ranges (MPQ2489DQ-LF-P, LED2001PHR, LM3402MR/NOPB, LM3406MH/NOPB, LM3407MY/NOPB) provide more accurate thermal performance data for high-power applications. Devices specified with TA ranges require thermal modeling to determine actual junction temperatures.
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