MP2483DS-LF LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP2483DS-LF is an active LED driver IC manufactured by Monolithic Power Systems Inc., designed for power management applications requiring step-down (buck) and step-up (boost) topology with integrated PWM control. This device delivers 2.5A output current across a 4.5V to 55V supply range, supporting both analog and PWM dimming for backlight and lighting applications. The part is automotive-grade and RoHS3 compliant, with 829 units currently in stock.

Equivalent and substitute parts are identified when design requirements permit tolerance of specific parameter variations, such as reduced output current, narrower supply voltage ranges, or different package configurations, while maintaining functional compatibility in LED driver applications.

Key Parameters

Parameter	MP2483DS-LF
Manufacturer	Monolithic Power Systems Inc.
Type	DC DC Regulator
Topology	Step-Down (Buck), Step-Up (Boost)
Output Current	2.5A
Supply Voltage Range	4.5V – 55V
Switching Frequency	500kHz
Dimming Control	Analog, PWM
Package	14-SOIC (0.154", 3.90mm Width)
Operating Temperature	-40°C ~ 85°C (TA)
Grade	Automotive
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the MP2483DS-LF is determined by the following critical parameters:

Topology Compatibility: Substitute parts must support step-down (buck), step-up (boost), or both topologies to maintain functional equivalence in LED driver applications.
Output Current Rating: Substitute parts with equal or greater current capacity (≥2.5A) provide direct replacement capability. Parts with lower current ratings (1.5A, 1A, 750mA, 30mA) are suitable only when application requirements permit reduced current delivery.
Supply Voltage Range: The main part operates across 4.5V–55V. Substitutes with narrower ranges (e.g., 2.7V–5.5V, 3V–22V) are acceptable only when the application supply voltage falls within both ranges.
Dimming Control: The main part supports both analog and PWM dimming. Substitutes supporting PWM-only dimming are acceptable; those supporting both analog and PWM provide full compatibility.
Package Type: Surface-mount packages (SOIC, QFN, MLF, DFN, TSOT-23, TSSOP, DSBGA) are interchangeable only when PCB layout permits the specific footprint.
Compliance & Grade: Active product status and RoHS3 compliance ensure long-term availability and regulatory alignment. Automotive-grade parts maintain the highest reliability standard.

Parameter Comparison

Parameter	MP2483DS-LF	LED2000PUR	ILD6150XUMA1	LM3405AXMK/NOPB	LT3478IFE#PBF	LT3518EUF#TRPBF	MIC2292-15YML-TR	AP5725FDCG-7
Manufacturer	MPS	STMicroelectronics	Infineon	Texas Instruments	Analog Devices	Analog Devices	Microchip	Diodes Inc.
Topology	Buck, Boost	Buck	Buck	Buck	Buck, Boost	Buck, Boost	Boost	Boost
Output Current	2.5A	3A	1.5A	1A	4.5A (Switch)	2.3A (Switch)	750mA (Switch)	750mA (Switch)
Supply Voltage (Min)	4.5V	3V	4.5V	3V	2.8V	3V	2.5V	2.7V
Supply Voltage (Max)	55V	18V	60V	22V	36V	30V	10V	5.5V
Frequency	500kHz	850kHz	1MHz	1.6MHz	200kHz–2.25MHz	250kHz–2.5MHz	1.6MHz	1.2MHz
Dimming	Analog, PWM	PWM	Analog, PWM	PWM	PWM	Analog, PWM	Analog, PWM	PWM
Package	14-SOIC	8-VFQFPN	8-SOIC	TSOT-23-6	16-TSSOP-EP	16-QFN (4x4)	8-MLF (2x2)	6-UDFN
Operating Temp	-40°C ~ 85°C (TA)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)
RoHS Status	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

Engineering Selection Recommendations

Direct Equivalents (Buck-Boost Topology with ≥2.3A Output)

LT3518EUF#TRPBF and LT3478IFE#PBF both support step-down and step-up topologies with analog and PWM dimming control. LT3518EUF#TRPBF delivers 2.3A switch current across a 3V–30V supply range and is active with RoHS3 compliance. LT3478IFE#PBF provides 4.5A switch current with extended frequency range (200kHz–2.25MHz) and operates across 2.8V–36V, also active and RoHS3 compliant. Both are suitable when supply voltage remains within 3V–30V.

Buck-Only Substitutes (Reduced Current, Narrower Supply Range)

LED2000PUR (STMicroelectronics) delivers 3A across 3V–18V with PWM dimming and operates to 150°C junction temperature. ILD6150XUMA1 (Infineon) provides 1.5A across 4.5V–60V with analog and PWM dimming, supporting higher supply voltages and extended temperature range to 150°C. LM3405AXMK/NOPB (Texas Instruments) delivers 1A across 3V–22V with PWM dimming in a compact TSOT-23-6 package.

Boost-Only Substitutes (Lower Current, Limited Supply Range)

MIC2292-15YML-TR (Microchip) and AP5725FDCG-7 (Diodes Inc.) are boost-topology devices with 750mA switch current, suitable only for low-power backlight applications. MIC2292-15YML-TR operates across 2.5V–10V with analog and PWM dimming. AP5725FDCG-7 operates across 2.7V–5.5V with PWM dimming only.

All recommended substitutes maintain active product status and RoHS3 compliance, ensuring regulatory alignment and long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can LED2000PUR replace MP2483DS-LF in all applications?

A: LED2000PUR is a buck-only topology device with 3A output current and operates across 3V–18V. It is suitable only when the application requires step-down conversion and the supply voltage remains within 3V–18V. The MP2483DS-LF supports both buck and boost topologies across 4.5V–55V, providing broader flexibility. LED2000PUR is not suitable for applications requiring boost conversion or supply voltages above 18V.

Q: What is the difference between switch current and output current?

A: Switch current refers to the maximum current the internal switching element can handle. Output current is the maximum current delivered to the load. In LED driver ICs, these terms are often used interchangeably. When comparing parts, ensure the specified current rating meets the application requirement.

Q: Is LT3518EUF#TRPBF a direct replacement for MP2483DS-LF?

A: LT3518EUF#TRPBF supports both buck and boost topologies with analog and PWM dimming, matching the MP2483DS-LF functional capability. However, it delivers 2.3A (versus 2.5A) and operates across 3V–30V (versus 4.5V–55V). It is suitable when the application supply voltage falls within 3V–30V and 2.3A output current is sufficient. The 16-QFN package differs from the 14-SOIC package, requiring PCB layout modification.

Q: Why do some substitutes have lower operating temperature ranges?

A: Operating temperature is specified as either ambient (TA) or junction (TJ). MP2483DS-LF specifies -40°C to 85°C ambient. Many substitutes specify -40°C to 125°C or 150°C junction temperature, which typically corresponds to higher ambient temperature capability when thermal design is adequate. Verify thermal requirements for your specific application.

Q: Can I use MIC2292-15YML-TR in place of MP2483DS-LF?

A: MIC2292-15YML-TR is a boost-only topology device with 750mA switch current and operates across 2.5V–10V. It is suitable only for low-power backlight applications requiring boost conversion within the 2.5V–10V supply range. It cannot replace MP2483DS-LF in applications requiring buck conversion, higher output current (2.5A), or supply voltages above 10V.

Q: What packaging considerations apply when selecting a substitute?

A: MP2483DS-LF uses 14-SOIC (0.154", 3.90mm width) package. Substitutes use different packages: 8-VFQFPN, 8-SOIC, TSOT-23-6, 16-TSSOP-EP, 16-QFN, 8-MLF, and 6-UDFN. Each package has different footprint, pin count, and thermal characteristics. PCB layout must be redesigned to accommodate the substitute package. Verify that the selected package meets thermal and space constraints.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant, matching the compliance status of MP2483DS-LF. This ensures regulatory alignment for applications subject to RoHS directives.

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