MPQ2483ADS-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MPQ2483ADS-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 integrated step-down (buck) and step-up (boost) topology, delivering 2.5A output current with analog and PWM dimming capabilities. The part operates across a 4.5V to 55V supply range at 250kHz frequency and is rated for automotive-grade applications with operating temperatures from -40°C to 125°C.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements mandate alternative package configurations or performance specifications. The following equivalent and substitute components maintain functional compatibility within defined electrical and mechanical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	MPQ2483ADS-LF-Z
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Down (Buck), Step-Up (Boost)
Number of Outputs	1
Voltage - Supply (Min)	4.5V
Voltage - Supply (Max)	55V
Current - Output / Channel	2.5A
Frequency	250kHz
Dimming	Analog, PWM
Package / Case	14-SOIC (0.154", 3.90mm Width)
Operating Temperature	-40°C ~ 125°C (TJ)
Grade	Automotive
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the MPQ2483ADS-LF-Z is determined by the following critical parameters:

Primary Substitution Criteria:

DC-DC regulator topology (step-down, step-up, or combined)
Output current capability (minimum 2.5A for direct replacement)
Supply voltage range compatibility (4.5V to 55V minimum)
Dimming capability (analog and/or PWM support)
Package type (surface mount configurations)
Operating temperature range (-40°C to 125°C minimum)
Automotive-grade qualification where applicable

Parametric Equivalent: MPQ2483ADS-AEC1-LF-Z maintains identical electrical specifications with AEC-Q100 automotive qualification and increased inventory availability.

Functional Substitutes: Parts listed below provide equivalent LED driver functionality with variations in topology, current rating, supply voltage range, package configuration, or operating temperature specifications. Selection depends on specific circuit requirements and design constraints.

Parameter Comparison

Parameter	MPQ2483ADS-LF-Z	MPQ2483ADS-AEC1-LF-Z	LT3518IUF#PBF	LM3402MR/NOPB	LM3530TME-40/NOPB	LT3517HFE#PBF	AP5724WG-7	LED2001PHR	NCP3066MNTXG
Manufacturer	MPS	MPS	Analog Devices	Texas Instruments	Texas Instruments	Linear Technology	Diodes Inc.	STMicroelectronics	onsemi
Topology	Buck/Boost	Buck/Boost	Buck/Boost	Buck	Boost	Buck/Boost	Boost	Buck	Buck/Boost
Supply Voltage Min	4.5V	4.5V	3V	6V	2.7V	3V	2.7V	3V	3V
Supply Voltage Max	55V	55V	30V	42V	5.5V	30V	5.5V	18V	40V
Output Current	2.5A	2.5A	2.3A (Switch)	500mA	30mA	1.5A (Switch)	750mA (Switch)	4A	1.5A (Switch)
Frequency	250kHz	250kHz	250kHz ~ 2.5MHz	1MHz	500kHz	250kHz ~ 2.5MHz	1.2MHz	850kHz	150kHz
Dimming	Analog, PWM	Analog, PWM	Analog, PWM	PWM	PWM	Analog, PWM	PWM	PWM	Analog, PWM
Operating Temp	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 150°C	-40°C ~ 85°C	-40°C ~ 150°C	0°C ~ 85°C
Package	14-SOIC	14-SOIC	16-QFN (4x4)	8-SO PowerPad	12-DSBGA	16-TSSOP-EP	SOT-26	8-HSOP	8-DFN (4x4)
Grade	Automotive	Automotive (AEC-Q100)	Industrial	Industrial	Industrial	Automotive	Industrial	Industrial	Industrial
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Direct Parametric Equivalent: MPQ2483ADS-AEC1-LF-Z is the recommended first choice for direct replacement. This part maintains identical electrical specifications, package configuration, and operating parameters while adding explicit AEC-Q100 automotive qualification. Inventory availability is significantly higher (24,639 units vs. 780 units), reducing procurement lead times.

Topology-Matched Substitutes for Buck/Boost Applications: LT3518IUF#PBF and LT3517HFE#PBF both provide combined step-down and step-up topology with analog and PWM dimming support. LT3518IUF#PBF is preferred due to active product status and ROHS3 compliance. LT3517HFE#PBF is obsolete and non-compliant with RoHS3 requirements, limiting suitability for new designs.

Buck-Only Topology Substitutes: LM3402MR/NOPB and LED2001PHR provide step-down regulation. LED2001PHR offers higher output current (4A) and extended operating temperature range (-40°C to 150°C) but operates within a narrower supply voltage window (3V to 18V). LM3402MR/NOPB is limited to 500mA output current.

Boost-Only Topology Substitutes: LM3530TME-40/NOPB and AP5724WG-7 provide step-up regulation. Both are constrained to low supply voltage ranges (2.7V to 5.5V) and reduced output current capabilities, suitable only for low-power backlight applications.

Multi-Topology Industrial Alternative: NCP3066MNTXG provides buck/boost topology with analog and PWM dimming in a compact 8-DFN package. Operating temperature range is limited to 0°C to 85°C, excluding low-temperature automotive applications.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance except LT3517HFE#PBF. Automotive-grade qualification is present only in MPQ2483ADS-AEC1-LF-Z and LT3517HFE#PBF. For automotive applications requiring RoHS3 compliance, MPQ2483ADS-AEC1-LF-Z is the only suitable substitute.

Frequently Asked Questions (FAQ)

Q: Can LM3530TME-40/NOPB replace MPQ2483ADS-LF-Z in a 48V automotive backlight circuit? A: No. LM3530TME-40/NOPB operates with a maximum supply voltage of 5.5V and is designed for low-voltage boost applications. The MPQ2483ADS-LF-Z supports 4.5V to 55V input, making it suitable for 48V systems. LM3530TME-40/NOPB cannot function at this voltage level.

Q: What is the difference between MPQ2483ADS-LF-Z and MPQ2483ADS-AEC1-LF-Z? A: Both parts are electrically and functionally identical with matching specifications across all parameters. The primary difference is explicit AEC-Q100 automotive qualification on the AEC1 variant and significantly higher inventory availability (24,639 units vs. 780 units). For automotive applications, the AEC1 variant is preferred.

Q: Is LT3517HFE#PBF suitable for new automotive designs? A: LT3517HFE#PBF is classified as obsolete and does not comply with ROHS3 requirements. It is not recommended for new designs. Use MPQ2483ADS-AEC1-LF-Z or LT3518IUF#PBF instead.

Q: Can LED2001PHR be used as a direct replacement in applications requiring 2.5A output? A: No. LED2001PHR provides 4A output current but operates only with 3V to 18V supply voltage and uses step-down (buck) topology exclusively. The MPQ2483ADS-LF-Z supports 4.5V to 55V with combined buck/boost topology. LED2001PHR is suitable only for lower-voltage buck-only applications.

Q: What package considerations apply when substituting with NCP3066MNTXG? A: NCP3066MNTXG uses an 8-DFN (4x4) package versus the 14-SOIC package of MPQ2483ADS-LF-Z. PCB layout modifications are required, including different pad configurations and thermal management considerations. The smaller package may improve thermal performance but requires design re-qualification.

Q: Are all substitute parts RoHS3 compliant? A: No. LT3517HFE#PBF is RoHS non-compliant. All other listed substitutes maintain ROHS3 compliance. Verify compliance requirements for your specific application before selection.

Q: Which substitute provides the widest operating temperature range? A: LED2001PHR and LT3517HFE#PBF both support -40°C to 150°C operating temperature. However, LT3517HFE#PBF is obsolete and non-compliant. LED2001PHR is active but limited to 3V to 18V supply voltage and buck-only topology.

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