MPQ3386DR-AEC1-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MPQ3386DR-AEC1-LF-Z is a 6-output LED driver IC manufactured by Monolithic Power Systems Inc., designed for automotive backlight applications. This device integrates a step-up (boost) DC-DC regulator with PWM dimming capability in a 24-QFN (4x4) surface mount package. The part is AEC-Q100 qualified, ROHS3 compliant, and currently active in production with 660 units in stock.

Equivalent and substitute parts are identified when they share the same functional topology, output configuration, and electrical operating parameters within acceptable ranges for LED driver applications. Substitutes enable design flexibility, supply chain alternatives, and component availability management.

Key Parameters

Parameter	Value
Manufacturer	Monolithic Power Systems Inc.
Part Number	MPQ3386DR-AEC1-LF-Z
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Number of Outputs	6
Supply Voltage Range	4.5V to 25V
Output Voltage	50V
Switching Frequency	1.25MHz
Dimming Control	PWM
Operating Temperature	-40°C to 125°C (TJ)
Package	24-VFQFN Exposed Pad (4x4)
Mounting Type	Surface Mount
Grade	Automotive
Qualification	AEC-Q100
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the MPQ3386DR-AEC1-LF-Z is based on the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) DC-DC regulator
Number of Outputs: 6 channels
Supply Voltage Range: Minimum 4.5V, Maximum 25V or higher
Output Voltage Capability: 50V or higher
Dimming Control: PWM capability
Package Type: Surface mount QFN or equivalent
Automotive Grade: AEC-Q100 qualification preferred
Operating Temperature: -40°C to 125°C or wider range

Substitution Categories:

Parametric Equivalent (Same Base Product): MPQ3386DR-AEC1-LF-P differs only in packaging suffix (P vs. Z), maintaining identical electrical specifications and AEC-Q100 qualification.
Functional Equivalents (Different Manufacturers, Similar Specs): Parts meeting 6-output, step-up topology, PWM dimming, and automotive qualification requirements with compatible voltage ranges.
Partial Equivalents (Reduced Output Count or Different Topology): Parts with 4 outputs or alternative topologies (charge pump) suitable for specific design requirements where full 6-output configuration is not mandatory.
Legacy/Obsolete Alternatives: Parts no longer in active production but functionally compatible for legacy design support.

Parameter Comparison

Part Number	Manufacturer	Outputs	Topology	Supply Min/Max	Output Voltage	Frequency	Dimming	Temp Range	Package	Status	AEC-Q100
MPQ3386DR-AEC1-LF-Z	MPS	6	Step-Up	4.5V / 25V	50V	1.25MHz	PWM	-40 to 125°C	24-QFN (4x4)	Active	Yes
MPQ3386DR-AEC1-LF-P	MPS	6	Step-Up	4.5V / 25V	50V	1.25MHz	PWM	-40 to 125°C	24-QFN (4x4)	Active	Yes
ALED7707TR	STMicroelectronics	6	Step-Up	4.5V / 36V	36V	250kHz-1MHz	PWM	-40 to 150°C	24-QFN (5x5)	Active	Yes
BD9470AEFV-E2	Rohm Semiconductor	6	Step-Up	9V / 35V	—	150kHz	PWM	-40 to 85°C	28-HTSSOP-B	Active	Yes
FAN5702UC30X	onsemi	6	Charge Pump	2.7V / 5.5V	—	1.2MHz	I2C, PWM	-40 to 85°C	16-WLCSP	Obsolete	Yes
ISL97671AIRZ-TK	Renesas Electronics	6	Step-Up	4.5V / 26.5V	45V	600kHz, 1.14MHz	PWM	-40 to 85°C	20-QFN (3x4)	Active	Yes
LP8552TLE-E06/NOPB	Texas Instruments	6	Step-Up	2.7V / 22V	40V	—	PWM	-40 to 85°C	25-DSBGA	Active	No
LP8552TLX/NOPB	Texas Instruments	6	Step-Up	2.7V / 22V	40V	—	PWM	-40 to 85°C	25-uSMD	Active	No
LP8556SQ-E08/NOPB	Texas Instruments	4	Step-Up	2.7V / 20V	7V-43V	312kHz, 625kHz, 1250kHz	PWM	-30 to 85°C	24-WQFN (4x4)	Active	No
LT3598IFE#PBF	Analog Devices Inc.	6	Step-Up	3V / 30V	44V	200kHz-2.5MHz	Analog, PWM	-40 to 125°C	24-TSSOP	Active	No
LT3598IUF#TRPBF	Analog Devices Inc.	6	Step-Up	3V / 30V	44V	200kHz-2.5MHz	Analog, PWM	-40 to 125°C	24-QFN (4x4)	Active	No

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

MPQ3386DR-AEC1-LF-P is the direct parametric equivalent, differing only in packaging suffix. Both parts maintain identical electrical specifications, AEC-Q100 qualification, and automotive-grade reliability. Selection between Z and P variants depends on tape & reel packaging requirements.

Recommended Substitutes (Automotive-Qualified, Active Production):

ALED7707TR (STMicroelectronics) and ISL97671AIRZ-TK (Renesas Electronics) are active production alternatives with AEC-Q100 qualification. Both maintain 6-output step-up topology and PWM dimming. ALED7707TR supports extended supply voltage (36V maximum) and wider operating temperature (-40 to 150°C), while ISL97671AIRZ-TK operates within comparable ranges (4.5V to 26.5V, -40 to 85°C). Package differences (24-QFN 5x5 vs. 20-QFN 3x4) require PCB layout verification.

BD9470AEFV-E2 (Rohm Semiconductor) is AEC-Q100 qualified with 6-output step-up topology but requires minimum 9V supply voltage, limiting compatibility with lower input voltage designs. Operating temperature range (-40 to 85°C) is narrower than the main part.

Alternative Substitutes (Non-Automotive Qualified):

LP8552TLE-E06/NOPB and LP8552TLX/NOPB (Texas Instruments) provide 6-output step-up topology with lower supply voltage floor (2.7V) but lack AEC-Q100 qualification. These are suitable for non-automotive applications or where automotive qualification is not mandatory.

LP8556SQ-E08/NOPB (Texas Instruments) reduces output count to 4 channels and lacks AEC-Q100 qualification. Selection requires design confirmation that 4 outputs satisfy application requirements.

Legacy/Obsolete Alternatives:

FAN5702UC30X (onsemi) is obsolete but remains in stock (2747 units). This part uses charge pump topology instead of step-up boost, operates at lower supply voltages (2.7V to 5.5V), and supports I2C and PWM dimming. Substitution requires verification that charge pump topology meets application requirements.

Extended Temperature Range Options:

LT3598IFE#PBF and LT3598IUF#TRPBF (Analog Devices Inc.) support -40 to 125°C operating range matching the main part. Both offer 6-output step-up topology with analog and PWM dimming. However, neither carries AEC-Q100 qualification. LT3598IUF#TRPBF matches the 24-QFN (4x4) package footprint, simplifying PCB migration.

Frequently Asked Questions (FAQ)

Q: Can MPQ3386DR-AEC1-LF-P be used as a direct replacement for MPQ3386DR-AEC1-LF-Z?

A: Yes. Both parts are parametric equivalents from Monolithic Power Systems Inc. with identical electrical specifications, AEC-Q100 qualification, and automotive-grade reliability. The suffix difference (Z vs. P) indicates packaging format variation. Verify tape & reel specifications match your assembly process requirements.

Q: What is the key difference between step-up (boost) and charge pump topologies in LED drivers?

A: Step-up topology uses an inductor to store and transfer energy, supporting higher output voltages and currents with greater efficiency. Charge pump topology uses capacitors for energy transfer, operates at lower supply voltages, and is more compact but typically delivers lower current per channel. FAN5702UC30X uses charge pump topology and is suitable only for applications where supply voltage does not exceed 5.5V.

Q: Why do some substitutes have lower maximum supply voltages?

A: Different IC designs optimize for specific input voltage ranges. LP8552 series targets lower supply voltages (2.7V minimum) for battery-powered applications, while MPQ3386 and ALED7707 support higher input ranges (4.5V to 25V or 36V) for automotive systems. Verify your application's supply voltage falls within the substitute's operating range.

Q: Is AEC-Q100 qualification mandatory for my application?

A: AEC-Q100 qualification is required for automotive-grade reliability and is mandatory in automotive OEM designs. Non-automotive applications may use non-qualified alternatives. Confirm qualification requirements with your design specification and end-use application.

Q: Can I substitute a 4-output LED driver for a 6-output design?

A: Only if your application requires fewer than 6 independent LED channels. LP8556SQ-E08/NOPB provides 4 outputs. Verify that your PCB layout and LED configuration can operate with reduced channel count before substitution.

Q: What package considerations apply when substituting different QFN variants?

A: QFN packages vary in footprint size and pin pitch. MPQ3386 uses 24-QFN (4x4), ALED7707 uses 24-QFN (5x5), and ISL97671 uses 20-QFN (3x4). Different footprints require PCB redesign. Verify pin-to-pin compatibility and thermal pad dimensions before layout migration.

Q: Why is FAN5702UC30X listed as obsolete?

A: FAN5702UC30X is no longer in active production by onsemi. However, 2747 units remain in stock. Obsolete parts carry supply risk and may not receive design support updates. Use only for legacy design maintenance or when supply chain alternatives are exhausted.

Q: What is the operating temperature difference between -40°C to 85°C and -40°C to 125°C?

A: The extended range (-40 to 125°C) supports higher junction temperatures typical of automotive under-hood environments. The standard range (-40 to 85°C) is suitable for cabin or external mounting with passive cooling. Verify thermal management and mounting location requirements before selecting a substitute with narrower temperature range.

Q: Can I use LT3598 series without AEC-Q100 qualification in automotive designs?

A: AEC-Q100 qualification is a formal automotive reliability requirement. Non-qualified parts may not meet OEM specifications and could fail qualification audits. Use LT3598 series only in non-automotive applications or obtain explicit OEM approval for qualification waiver.

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