MPQ2483ADS-LF LED Driver Regulator IC Equivalent & Substitute Parts

Part Overview

The MPQ2483ADS-LF is an active LED Driver Regulator IC manufactured by Monolithic Power Systems Inc., designed for backlight applications requiring step-down (buck) and step-up (boost) topology with PWM and analog dimming control. This 14-SOIC surface mount device delivers 2.5A output current across a 4.5V to 55V supply range with 250kHz switching frequency and automotive-grade qualification. The part is currently in active production status with 871 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand alternative package configurations, when higher current capacity is needed, or when different supply voltage ranges are required for specific application constraints.

Key Parameters

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

Substitute Part Grouping Explanation

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

Primary Substitution Criteria:

Topology: Step-Down (Buck), Step-Up (Boost) configuration
Dimming capability: Analog and/or PWM control
Output current capacity: Minimum 2.5A (or higher)
Supply voltage range: Minimum 4.5V input support
Operating temperature: -40°C to 125°C junction temperature
Package compatibility: Surface mount with similar thermal characteristics

Parametric Equivalent (Same Electrical Specifications): MPQ2483ADS-AEC1-LF maintains identical electrical parameters to the main part with added AEC-Q100 automotive qualification, making it a direct parametric equivalent with enhanced reliability certification.

Manufacturer Recommended Substitutes (Functional Equivalents with Parameter Variations):

LED5000PHR: Higher current capacity (3A) with different package (8-HSOP) and higher switching frequency (850kHz)
LT3517IFE#PBF: Lower current capacity (1.5A switch) with extended frequency range (250kHz ~ 2.5MHz) and different package (16-TSSOP-EP)
LT3517IUF#TRPBF: Lower current capacity (1.5A switch) with extended frequency range and QFN package (16-QFN 4x4)
LT3518EUF#TRPBF: Higher current capacity (2.3A switch) with extended frequency range and QFN package (16-QFN 4x4)
NCP5030MTTXG: Lower current capacity (900mA) with restricted supply range (2.7V ~ 5.5V) and obsolete status
RT8476AGSP: No internal switch, restricted supply range (4.5V ~ 40V), and obsolete status

Parameter Comparison

Part Number	Manufacturer	Topology	Package	Supply Min	Supply Max	Output Current	Frequency	Dimming	Temp Range	Status
MPQ2483ADS-LF	MPS	Buck/Boost	14-SOIC	4.5V	55V	2.5A	250kHz	Analog, PWM	-40 to 125°C	Active
MPQ2483ADS-AEC1-LF	MPS	Buck/Boost	14-SOIC	4.5V	55V	2.5A	250kHz	Analog, PWM	-40 to 125°C	Active
LED5000PHR	STMicroelectronics	Buck/Boost	8-HSOP	5.5V	48V	3A	850kHz	PWM	-40 to 125°C	Active
LT3517IFE#PBF	Analog Devices	Buck/Boost	16-TSSOP-EP	3V	30V	1.5A (Switch)	250kHz ~ 2.5MHz	Analog, PWM	-40 to 125°C	Active
LT3517IUF#TRPBF	Analog Devices	Buck/Boost	16-QFN (4x4)	3V	30V	1.5A (Switch)	250kHz ~ 2.5MHz	Analog, PWM	-40 to 125°C	Active
LT3518EUF#TRPBF	Analog Devices	Buck/Boost	16-QFN (4x4)	3V	30V	2.3A (Switch)	250kHz ~ 2.5MHz	Analog, PWM	-40 to 125°C	Active
NCP5030MTTXG	onsemi	Buck/Boost	12-WDFN (3x4)	2.7V	5.5V	900mA	700kHz	PWM	-40 to 85°C	Obsolete
RT8476AGSP	Richtek USA	Buck/Boost	8-SOP-EP	4.5V	40V	Not Specified	Not Specified	Analog, PWM	-40 to 85°C	Obsolete

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent): MPQ2483ADS-AEC1-LF is the only direct parametric equivalent, offering identical electrical specifications with AEC-Q100 automotive qualification. This part is recommended when enhanced reliability certification is required for automotive applications.

Functional Substitutes for Higher Current Requirements: LED5000PHR provides 3A output current (20% higher than the main part) with active product status. However, the minimum supply voltage increases to 5.5V, eliminating compatibility with 4.5V supply designs. The 8-HSOP package differs from the 14-SOIC footprint, requiring PCB layout modifications.

Functional Substitutes for Extended Frequency Range: LT3517IFE#PBF, LT3517IUF#TRPBF, and LT3518EUF#TRPBF offer programmable frequency from 250kHz to 2.5MHz with active product status. LT3517 variants deliver 1.5A output current (insufficient for 2.5A designs), while LT3518EUF#TRPBF provides 2.3A (92% of main part capacity). All three require supply voltage limited to 30V maximum, restricting use in 55V applications. Package changes (16-TSSOP-EP or 16-QFN) necessitate PCB redesign.

Avoid Obsolete Parts: NCP5030MTTXG and RT8476AGSP carry obsolete product status. NCP5030MTTXG is limited to 900mA output current and 5.5V maximum supply. RT8476AGSP lacks specified output current and frequency parameters, and operates only to 85°C junction temperature.

Frequently Asked Questions (FAQ)

Q: Can MPQ2483ADS-AEC1-LF replace MPQ2483ADS-LF in all applications? A: Yes. MPQ2483ADS-AEC1-LF is a parametric equivalent with identical electrical specifications. The only difference is the addition of AEC-Q100 automotive qualification, making it suitable for all applications where the original part is used.

Q: Is LED5000PHR a suitable replacement for designs requiring 2.5A output? A: LED5000PHR provides 3A output current, exceeding the 2.5A requirement. However, the minimum supply voltage is 5.5V, making it incompatible with 4.5V supply designs. Additionally, the 8-HSOP package differs from the 14-SOIC footprint, requiring PCB layout changes.

Q: What are the key limitations of LT3517 and LT3518 series substitutes? A: LT3517IFE#PBF and LT3517IUF#TRPBF deliver only 1.5A output current, insufficient for 2.5A applications. LT3518EUF#TRPBF provides 2.3A, which is 92% of the main part capacity. All three limit supply voltage to 30V maximum, eliminating compatibility with 55V designs. Package changes require PCB redesign.

Q: Why are NCP5030MTTXG and RT8476AGSP not recommended? A: Both parts carry obsolete product status. NCP5030MTTXG is limited to 900mA output current and 5.5V maximum supply voltage. RT8476AGSP lacks specified output current and frequency parameters, and operates only to 85°C junction temperature, below the -40°C to 125°C range of the main part.

Q: Can I use a substitute part with a different package without design changes? A: No. All recommended substitutes except MPQ2483ADS-AEC1-LF use different packages (8-HSOP, 16-TSSOP-EP, or 16-QFN). Package changes require PCB layout modifications, including trace routing, via placement, and thermal management adjustments.

Q: What supply voltage range must I verify before selecting a substitute? A: The main part supports 4.5V to 55V input. LED5000PHR requires minimum 5.5V, eliminating 4.5V designs. LT3517 and LT3518 variants limit supply to 30V maximum, incompatible with 55V applications. Verify your design supply voltage against each substitute's specified range.

Q: Are all active-status substitutes suitable for automotive applications? A: MPQ2483ADS-AEC1-LF carries automotive grade with AEC-Q100 qualification. LED5000PHR, LT3517 variants, and LT3518EUF#TRPBF are active but lack specified automotive qualification in the provided data. Verify automotive compliance requirements with manufacturer datasheets before selection.

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