MPQ2483ADS-AEC1-LF-Z LED Driver IC Equivalent & Substitute Parts

Part Overview

The MPQ2483ADS-AEC1-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) and Step-Up (Boost) topology, delivering 2.5A output current with integrated PWM and Analog dimming capabilities. The part operates across a 4.5V to 55V supply range and is qualified to AEC-Q100 automotive standards with ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter ranges for LED driver applications, particularly for backlight and lighting systems. Substitution becomes necessary due to inventory constraints, manufacturing discontinuation, or design optimization requirements while maintaining functional compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	MPQ2483ADS-AEC1-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
Qualification	AEC-Q100
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the MPQ2483ADS-AEC1-LF-Z are selected based on functional equivalence within the following critical parameters:

Primary Substitution Criteria:

DC DC Regulator topology supporting Step-Down (Buck) and/or Step-Up (Boost) configurations
Single output channel
Supply voltage range compatibility (minimum 4.5V or lower, maximum 55V or higher)
Output current capability of 2.5A or greater
PWM dimming capability (Analog dimming is optional but preferred)
Surface mount packaging suitable for automated assembly
Operating temperature range of -40°C to 125°C or higher
Active product status or equivalent qualification level

Substitutes are grouped by topology alignment and current handling capacity. Parts with Step-Down (Buck) only topology are included when output current and voltage specifications remain compatible. Parts with lower current ratings (1.5A, 2A) are listed as alternatives for reduced-load applications. Frequency variation is acceptable within industry standards for LED driver applications.

Parameter Comparison

Parameter	MPQ2483ADS-AEC1-LF-Z	LED5000PHR	LM3402HVMRX/NOPB	LT3478IFE-1#PBF	LT3517IUF#TRPBF	LT3518HUF#PBF	NCP3065DR2G	PAM2863ECR	RT8471GJ5	TPS61165DBVT
Manufacturer	MPS	STMicroelectronics	National Semiconductor	Analog Devices	Analog Devices	Analog Devices	onsemi	Diodes Inc.	Richtek USA	Texas Instruments
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Buck, Boost	Buck, Boost	Buck	Buck, Boost	Buck, Boost	Buck, Boost	Buck, Boost	Buck	Buck	Boost
Number of Outputs	1	1	1	1	1	1	1	1	1	1
Voltage - Supply (Min)	4.5V	5.5V	6V	2.8V	3V	3V	3V	4.5V	7V	3V
Voltage - Supply (Max)	55V	48V	75V	36V	30V	30V	40V	40V	36V	18V
Current - Output / Channel	2.5A	3A	500mA	4.5A (Switch)	1.5A (Switch)	2.3A (Switch)	1.5A (Switch)	2A	1A	1.2A (Switch)
Frequency	250kHz	850kHz	1MHz	200kHz ~ 2.25MHz	250kHz ~ 2.5MHz	250kHz ~ 2.5MHz	150kHz	233kHz ~ 1MHz	-	1.2MHz
Dimming	Analog, PWM	PWM	PWM	PWM	Analog, PWM	Analog, PWM	Analog, PWM	Analog, PWM	Analog, PWM	PWM
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)
Grade	Automotive	-	-	-	-	-	-	-	Automotive	Automotive
RoHS Status	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

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

LED5000PHR (STMicroelectronics) and LT3478IFE-1#PBF (Analog Devices) provide the closest functional equivalence. Both support Buck-Boost topology with output current ratings exceeding 2.5A, operate across compatible supply voltage ranges, and maintain active product status with ROHS3 compliance. LED5000PHR delivers 3A at 850kHz with PWM dimming. LT3478IFE-1#PBF provides 4.5A switch current with extended frequency range (200kHz to 2.25MHz) and operates down to 2.8V minimum supply.

Secondary Substitutes (Topology or Current Limitations):

LT3517IUF#TRPBF and LT3518HUF#PBF (Analog Devices) support Buck-Boost topology with Analog and PWM dimming but deliver reduced switch current (1.5A and 2.3A respectively). These are suitable for applications where output current requirements do not exceed their ratings. Both maintain -40°C to 125°C operating range and ROHS3 compliance.

NCP3065DR2G (onsemi) provides Buck-Boost topology with 1.5A switch current, Analog and PWM dimming, and operates across 3V to 40V supply range. Product status is active with ROHS3 compliance.

Reduced-Current Alternatives:

PAM2863ECR (Diodes Incorporated) supports Buck topology only with 2A output current, Analog and PWM dimming, and 4.5V to 40V supply range. Operating temperature is limited to -40°C to 85°C. Suitable for applications where Boost functionality is not required.

RT8471GJ5 (Richtek USA Inc.) provides Buck topology with 1A output current, Analog and PWM dimming, and automotive grade qualification. Supply range is 7V to 36V. Suitable for low-current LED driver applications.

Boost-Only Alternative:

TPS61165DBVT (Texas Instruments) supports Step-Up (Boost) topology exclusively with 1.2A switch current and PWM dimming. Supply range is 3V to 18V with output voltage range of 3V to 38V. Automotive grade and ROHS3 compliant. Applicable only when Boost-only functionality is acceptable.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance. Automotive-grade options include MPQ2483ADS-AEC1-LF-Z (AEC-Q100 qualified), RT8471GJ5, and TPS61165DBVT. For applications requiring automotive qualification, these three parts are preferred. All active-status parts support the -40°C to 125°C operating temperature range required for automotive backlight applications.

Frequently Asked Questions (FAQ)

Q: Can LED5000PHR directly replace MPQ2483ADS-AEC1-LF-Z in existing designs?

A: LED5000PHR is functionally compatible for Buck-Boost LED driver applications. Both support 1-output DC DC regulation with PWM dimming. However, LED5000PHR operates at 850kHz versus 250kHz for the MPQ2483, and the package is 8-HSOP versus 14-SOIC. PCB layout modifications are required. Verify that the higher switching frequency does not introduce EMI issues in your application.

Q: What is the key difference between LT3478IFE-1#PBF and LT3517IUF#TRPBF?

A: LT3478IFE-1#PBF delivers 4.5A switch current in a 16-TSSOP package with frequency range 200kHz to 2.25MHz. LT3517IUF#TRPBF delivers 1.5A switch current in a 16-QFN (4x4) package with frequency range 250kHz to 2.5MHz. Both support Buck-Boost topology and Analog/PWM dimming. Select LT3478 for higher current applications; select LT3517 for space-constrained designs with lower current requirements.

Q: Is PAM2863ECR suitable for applications requiring Boost functionality?

A: No. PAM2863ECR supports Step-Down (Buck) topology only. If your application requires Step-Up (Boost) capability, select from LED5000PHR, LT3478IFE-1#PBF, LT3517IUF#TRPBF, LT3518HUF#PBF, NCP3065DR2G, or TPS61165DBVT.

Q: Which substitute parts are qualified for automotive applications?

A: RT8471GJ5 and TPS61165DBVT carry automotive grade designation. MPQ2483ADS-AEC1-LF-Z is AEC-Q100 qualified. For automotive backlight applications requiring formal qualification, these three parts are recommended. Other substitutes are active-status industrial-grade components suitable for non-automotive LED driver applications.

Q: What packaging options are available among the substitute parts?

A: Packaging varies across substitutes. MPQ2483ADS-AEC1-LF-Z uses 14-SOIC. LED5000PHR uses 8-HSOP. LT3478IFE-1#PBF uses 16-TSSOP-EP. LT3517IUF#TRPBF and LT3518HUF#PBF use 16-QFN (4x4). NCP3065DR2G uses 8-SOIC. PAM2863ECR uses 8-SOIC with exposed pad. RT8471GJ5 uses TSOT-23-5. TPS61165DBVT uses SOT-23-6. Verify PCB footprint compatibility before selection.

Q: Can I use TPS61165DBVT as a direct substitute?

A: TPS61165DBVT is a Boost-only topology device, whereas MPQ2483ADS-AEC1-LF-Z supports both Buck and Boost. Use TPS61165DBVT only if your application requires Step-Up (Boost) functionality exclusively. Supply voltage range is limited to 3V to 18V, and output current is 1.2A (Switch). Not suitable for applications requiring Buck topology or higher current delivery.

Q: What is the significance of the frequency difference between MPQ2483 (250kHz) and LED5000PHR (850kHz)?

A: Higher switching frequency (850kHz) allows for smaller passive component values in the power stage, reducing board space and cost. However, higher frequency increases switching losses and EMI generation. Verify that your PCB layout and filtering design accommodate the higher frequency before substituting LED5000PHR for MPQ2483ADS-AEC1-LF-Z.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts except LM3402HVMRX/NOPB are confirmed ROHS3 compliant. LM3402HVMRX/NOPB compliance status is not specified in the provided data. Verify RoHS compliance documentation with the supplier if regulatory compliance is required for your application.

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