MP24892DJ-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP24892DJ-LF-P 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) topology, delivering 1A output current with analog and PWM dimming capabilities. The part is housed in a TSOT-23-5 surface mount package and is automotive-grade qualified.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative package configurations, voltage ratings, or current handling capabilities while maintaining functional compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP24892DJ-LF-P
Manufacturer	Monolithic Power Systems Inc.
Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Down (Buck)
Number of Outputs	1
Voltage Supply Range	6V to 45V
Current Output / Channel	1A
Frequency	600kHz
Dimming	Analog, PWM
Package / Case	SOT-23-5 Thin (TSOT-23-5)
Operating Temperature	-40°C to 125°C (TJ)
Grade	Automotive
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the MP24892DJ-LF-P is determined by the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Down (Buck) configuration
Number of Outputs: Single output
Current Rating: 1A output capability
Dimming Support: PWM and/or Analog dimming
Voltage Supply Range: Minimum 6V input support
Operating Temperature: -40°C to 125°C range
Automotive Grade qualification
RoHS3 Compliance

Package Compatibility Considerations:

TSOT-23-5 package is the primary form factor; alternative packages (8-SOIC, 8-HVSSOP, 16-TSSOP) represent functional equivalents with different PCB footprints
Surface mount mounting type is required across all substitutes

Substitution Categories:

Parametric Equivalents (Same Manufacturer): MP24892DJ-LF-Z and MP2489DJ-LF-Z maintain identical electrical specifications with packaging or supply voltage variations
Manufacturer Recommended Alternatives: Parts from Allegro MicroSystems, Texas Instruments, and Analog Devices with matching or superior electrical performance
Functional Equivalents: Parts with higher current ratings (3A, 4.5A) or extended voltage ranges that exceed minimum requirements

Parameter Comparison

Part Number	Manufacturer	Topology	Output Current	Supply Voltage (Min-Max)	Dimming	Package	Operating Temp	Automotive Grade
MP24892DJ-LF-P	Monolithic Power Systems	Step-Down (Buck)	1A	6V - 45V	Analog, PWM	TSOT-23-5	-40°C to 125°C	Yes
MP24892DJ-LF-Z	Monolithic Power Systems	Step-Down (Buck)	1A	6V - 45V	Analog, PWM	TSOT-23-5	-40°C to 125°C	Yes
MP2489DJ-LF-Z	Monolithic Power Systems	Step-Down (Buck)	1A	6V - 60V	Analog, PWM	TSOT-23-5	-40°C to 125°C	Yes
A6217KLJTR-T	Allegro MicroSystems	Step-Down (Buck)	3A	6V - 48V	PWM	8-SOIC-EP	-40°C to 125°C	Yes (AEC-Q100)
LM3404MAX/NOPB	Texas Instruments	Step-Down (Buck)	1A	6V - 42V	PWM	8-SOIC	-40°C to 125°C	Yes
LM3405AXMKE/NOPB	Texas Instruments	Step-Down (Buck)	1A	3V - 22V	PWM	TSOT-23-6	-40°C to 125°C	No
LM3405AXMY/NOPB	Texas Instruments	Step-Down (Buck)	1A	3V - 22V	PWM	8-HVSSOP	-40°C to 125°C	No
LM3414MR/NOPB	Texas Instruments	Step-Down (Buck)	1A	4.5V - 42V	Analog, PWM	8-PowerSOIC	-40°C to 125°C	Yes
LT3474IFE#PBF	Analog Devices Inc.	Step-Down (Buck)	1A	4.6V - 36V	PWM	16-TSSOP-EP	-40°C to 125°C	Yes
LT3478EFE-1#PBF	Analog Devices Inc.	Step-Down (Buck), Step-Up (Boost)	4.5A (Switch)	2.8V - 36V	PWM	16-TSSOP-EP	-40°C to 125°C	No
TPS61166DSKT	Texas Instruments	Step-Up (Boost)	1.1A (Switch)	2.5V - 6V	PWM	10-SON (2.5x2.5)	-40°C to 85°C	No

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended First Choice): MP24892DJ-LF-Z and MP2489DJ-LF-Z are direct functional equivalents manufactured by Monolithic Power Systems. Both maintain identical electrical specifications, automotive-grade qualification, and ROHS3 compliance. MP2489DJ-LF-Z offers extended supply voltage range to 60V, providing additional design margin for high-voltage applications. Selection between these variants depends on packaging requirements and inventory availability.

Automotive-Grade Alternatives with Matching Specifications: LM3404MAX/NOPB (Texas Instruments) and LM3414MR/NOPB (Texas Instruments) are automotive-qualified substitutes maintaining 1A output current and step-down topology. LM3404MAX/NOPB operates within 6V to 42V supply range with PWM dimming. LM3414MR/NOPB extends supply range to 4.5V minimum and supports both analog and PWM dimming, matching the original part's dimming flexibility. Both devices are ROHS3 compliant and rated for -40°C to 125°C operation.

Higher Current Capacity Alternative: A6217KLJTR-T (Allegro MicroSystems) provides 3A output current with AEC-Q100 automotive qualification. This part is suitable for applications requiring higher current delivery while maintaining step-down topology and 6V to 48V supply range. Package change to 8-SOIC-EP requires PCB layout modification.

Limited Voltage Range Alternatives: LM3405AXMKE/NOPB and LM3405AXMY/NOPB (Texas Instruments) operate within 3V to 22V supply range, restricting their use to lower-voltage applications. These parts lack automotive-grade qualification and are suitable only for non-automotive designs within their voltage specification.

Topology Variants: LT3478EFE-1#PBF (Analog Devices) combines step-down and step-up (buck-boost) topology with 4.5A switch current, offering design flexibility for applications requiring bidirectional power conversion. TPS61166DSKT (Texas Instruments) implements step-up (boost) topology exclusively, suitable only for applications requiring voltage elevation from 2.5V to 6V input range.

Frequently Asked Questions (FAQ)

Q: Can MP24892DJ-LF-Z be used as a direct replacement for MP24892DJ-LF-P? A: Yes. Both parts are manufactured by Monolithic Power Systems with identical electrical specifications, topology, output current, dimming capabilities, and automotive qualification. The primary difference is packaging format (Tape & Reel vs. alternative packaging). Verify packaging requirements before substitution.

Q: What is the key difference between MP24892DJ-LF-Z and MP2489DJ-LF-Z? A: MP2489DJ-LF-Z extends the maximum supply voltage from 45V to 60V, providing additional input voltage margin. All other electrical parameters remain identical. Selection depends on whether your application requires the extended 60V capability.

Q: Can LM3405AXMKE/NOPB replace MP24892DJ-LF-P in automotive applications? A: No. While LM3405AXMKE/NOPB maintains 1A output current and step-down topology, it lacks automotive-grade qualification and operates within a restricted 3V to 22V supply range, incompatible with the original part's 6V to 45V specification. This part is suitable only for non-automotive, lower-voltage designs.

Q: Is A6217KLJTR-T a suitable substitute if my application requires higher current? A: Yes, if your design can accommodate the package change from TSOT-23-5 to 8-SOIC-EP. A6217KLJTR-T provides 3A output current (versus 1A) with AEC-Q100 automotive qualification and operates within 6V to 48V supply range. PCB layout modification is required due to different footprint.

Q: Why is TPS61166DSKT listed as a substitute if it uses boost topology instead of buck? A: TPS61166DSKT is a functional alternative only for applications where step-up (boost) conversion is required. It is not a direct replacement for buck-topology applications. The topology difference fundamentally changes circuit operation and is suitable only for specific use cases requiring voltage elevation from low input sources.

Q: What is the significance of the TSOT-23-5 package for MP24892DJ-LF-P? A: TSOT-23-5 is a thin surface mount package with 5 leads, providing compact form factor suitable for space-constrained applications. Substitute parts using alternative packages (8-SOIC, 8-HVSSOP, 16-TSSOP) require different PCB footprints and layout considerations. Package selection impacts board area, thermal performance, and manufacturing compatibility.

Q: Are all listed substitutes ROHS3 compliant? A: No. MP24892DJ-LF-P, MP24892DJ-LF-Z, MP2489DJ-LF-Z, A6217KLJTR-T, LM3404MAX/NOPB, LM3405AXMKE/NOPB, LM3405AXMY/NOPB, LM3414MR/NOPB, LT3474IFE#PBF, LT3478EFE-1#PBF, and TPS61166DSKT are all ROHS3 compliant. Verify compliance requirements for your specific application before selection.

Q: What is the operating temperature range for all substitutes? A: Most substitutes operate within -40°C to 125°C. TPS61166DSKT operates within a narrower range of -40°C to 85°C. Verify temperature requirements for your application, particularly for automotive or industrial environments requiring extended temperature operation.

Q: Can LT3478EFE-1#PBF be used in place of MP24892DJ-LF-P? A: LT3478EFE-1#PBF is not recommended as a direct substitute. While it supports step-down topology, it combines buck and boost functionality with 4.5A switch current and operates within 2.8V to 36V supply range. It lacks automotive-grade qualification. Use only if your design specifically requires buck-boost capability and non-automotive qualification is acceptable.

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