MP24183DQ-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP24183DQ-LF-P is an LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management (PMIC) device. This single-output DC-DC regulator features step-down (buck) topology with internal switching capability, delivering 1A output current for backlight applications. The device operates across a 4.5V to 55V supply range with analog and PWM dimming control, housed in a 10-QFN (3x3) package. Currently in active product status with automotive-grade qualification, this component is widely used in LED backlight driver circuits. Equivalent and substitute parts are identified based on matching functional topology, output current capability, dimming control methods, and thermal operating ranges to ensure direct functional replacement in target applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MP24183DQ-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 (Min)	4.5V
Voltage - Supply (Max)	55V
Current - Output / Channel	1A
Dimming	Analog, PWM
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Grade	Automotive
Package / Case	10-VFDFN Exposed Pad
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the MP24183DQ-LF-P are selected based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Topology: Step-Down (Buck) or Step-Down/Step-Up (Buck-Boost) capable
Output Current: Minimum 1A switch current or equivalent output capability
Dimming Control: Analog and/or PWM dimming support
Supply Voltage Range: Overlap with 4.5V to 55V input specification
Applications: LED driver or backlight-specific functionality
Package Type: Surface mount with exposed pad construction
Compliance: ROHS3 compliant, automotive-grade preferred

Substitutes are grouped into two categories: direct topology matches (step-down buck converters) and extended topology matches (buck-boost converters offering greater flexibility). All identified substitutes maintain single-output configuration and support PWM dimming at minimum.

Parameter Comparison

Parameter	MP24183DQ-LF-P	LM3508TLX/NOPB	LT3517EUF#TRPBF	MIC2292-15YML-TR	NCP3066DR2G	NCP5030MTTXG
Manufacturer	MPS	Texas Instruments	Analog Devices	Microchip	onsemi	onsemi
Topology	Step-Down (Buck)	Step-Up (Boost)	Step-Down/Step-Up (Buck-Boost)	Step-Up (Boost)	Step-Down/Step-Up (Buck-Boost)	Step-Down/Step-Up (Buck-Boost)
Number of Outputs	1	1	1	1	1	1
Voltage - Supply (Min)	4.5V	2.7V	3V	2.5V	3V	2.7V
Voltage - Supply (Max)	55V	5.5V	30V	10V	40V	5.5V
Current - Output / Channel	1A	30mA	1.5A (Switch)	750mA (Switch)	1.5A (Switch)	900mA
Dimming	Analog, PWM	PWM	Analog, PWM	Analog, PWM	Analog, PWM	PWM
Applications	Backlight	Backlight	Backlight	Backlight	Lighting	-
Operating Temperature	-40°C ~ 85°C (TA)	-30°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	0°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	10-VFDFN Exposed Pad	9-WFBGA, DSBGA	16-WQFN Exposed Pad	8-VFDFN Exposed Pad, 8-MLF®	8-SOIC (0.154", 3.90mm Width)	12-WFDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Obsolete

Engineering Selection Recommendations

LT3517EUF#TRPBF (Analog Devices Inc.) represents the most functionally aligned substitute. This device offers buck-boost topology with 1.5A switch current, dual dimming control (analog and PWM), and extended supply voltage range (3V to 30V). Operating temperature extends to 125°C junction temperature, exceeding the MP24183DQ-LF-P specification. ROHS3 compliance and active product status ensure long-term availability. Package transition from 10-QFN to 16-QFN requires PCB layout modification.

NCP3066DR2G (onsemi) provides buck-boost capability with 1.5A switch current and dual dimming support across 3V to 40V supply range. Active product status and ROHS3 compliance are confirmed. Operating temperature range (0°C to 85°C) matches the main part. Package change to 8-SOIC represents a significant footprint reduction, suitable for space-constrained applications.

NCP5030MTTXG (onsemi) offers buck-boost topology with 900mA output current and PWM dimming across 2.7V to 5.5V supply range. Product status is obsolete; this part is not recommended for new designs despite current inventory availability.

LM3508TLX/NOPB (Texas Instruments) features boost topology with 30mA output current, limiting applicability to lower-power backlight circuits. Supply range (2.7V to 5.5V) is significantly narrower than the main part. This substitute is suitable only for applications with reduced current requirements.

MIC2292-15YML-TR (Microchip Technology) provides boost topology with 750mA switch current and dual dimming control. Supply range (2.5V to 10V) is restricted compared to the main part. Extended operating temperature to 125°C and active product status support long-term deployment.

Frequently Asked Questions (FAQ)

Q: Can LT3517EUF#TRPBF directly replace MP24183DQ-LF-P without circuit modification?

A: Functional replacement is possible due to matching dimming control methods and superior current capability. However, buck-boost topology differs from the buck-only design of the main part. PCB layout changes are required due to package transition from 10-QFN to 16-QFN. Circuit design review is necessary to validate output voltage regulation and frequency response characteristics.

Q: Why does LM3508TLX/NOPB have significantly lower output current (30mA vs. 1A)?

A: LM3508TLX/NOPB is optimized for lower-power backlight applications with reduced LED current requirements. This device is not suitable for applications requiring full 1A output current. Selection should be based on actual circuit current demands.

Q: What is the impact of NCP5030MTTXG obsolete status?

A: Obsolete product status indicates discontinued manufacturing and limited future availability. While current inventory exists (16,900 pcs), new designs should not incorporate this part. Active alternatives such as LT3517EUF#TRPBF or NCP3066DR2G are recommended for production designs.

Q: How does package change from 10-QFN to 16-QFN affect PCB design?

A: Package transition requires complete PCB layout redesign. The 16-QFN (4x4) package is larger than 10-QFN (3x3), affecting board space allocation, trace routing, and thermal management. Thermal pad design and via placement must be re-evaluated for optimal heat dissipation.

Q: Are all substitute parts automotive-grade qualified?

A: The main part MP24183DQ-LF-P carries automotive-grade qualification. Among substitutes, only MP24183DQ-LF-P and TPS92662QPHPRQ1 explicitly list automotive grade with AEC-Q100 qualification. Other substitutes are industrial-grade components. Automotive applications must verify qualification requirements with manufacturers.

Q: What is the significance of extended operating temperature in LT3517EUF#TRPBF (-40°C to 125°C TJ)?

A: Extended junction temperature range (125°C vs. 85°C ambient) provides greater thermal margin in high-temperature environments. This specification indicates superior thermal performance and reliability in demanding applications. However, circuit design must still ensure actual junction temperature remains within specified limits through adequate thermal management.

Q: Can NCP3066DR2G be used in applications requiring the full 4.5V to 55V supply range?

A: NCP3066DR2G maximum supply voltage is 40V, which does not cover the full 55V specification of the main part. This substitute is suitable only for applications operating within the 3V to 40V range. Applications requiring 55V input must use alternatives such as LT3517EUF#TRPBF or NCP5030MTTXG.

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