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MP24893DJ-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP24893DJ-LF-Z is a LED Driver IC manufactured by Monolithic Power Systems Inc., designed as a 1-output DC-DC regulator with step-down (buck) topology. This device integrates an internal switch and supports analog and PWM dimming for backlight, lighting, and signage applications. The part operates across a 6V to 36V supply range with 1A output current capability in a TSOT-23-5 surface mount package.
The MP24893DJ-LF-Z carries a "Not For New Designs" product status, indicating it is obsolete or being phased out. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently using this component.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MP24893DJ-LF-Z |
| Manufacturer | Monolithic Power Systems Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Down (Buck) |
| Internal Switch | Yes |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 6V |
| Voltage - Supply (Max) | 36V |
| Current - Output / Channel | 1A |
| Dimming | Analog, PWM |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 |
| Mounting Type | Surface Mount |
| Grade | Automotive |
| RoHS Status | ROHS3 Compliant |
| Product Status | Not For New Designs |
Substitute Part Grouping Explanation
Substitution of the MP24893DJ-LF-Z is determined by the following critical parameters:
Topology & Function: All substitute parts must be step-down (buck) DC-DC regulators with integrated internal switches and single output configuration to maintain functional equivalence.
Electrical Specifications: Supply voltage range (minimum 6V, maximum 36V or higher), output current capability (1A or greater), and dimming support (analog, PWM, or both) are primary selection criteria.
Thermal Performance: Operating temperature range must support -40°C to 125°C or equivalent to maintain automotive-grade reliability.
Package Compatibility: While the original uses TSOT-23-5, substitute parts may use alternative surface mount packages (8-MSOP, 8-DFN, SOT-89-5, 8-SO PowerPad, SC-70-6, 16-TSSOP, 20-QFN, 10-DFN) provided they are surface mount and compatible with PCB layout requirements.
Compliance: All substitutes must maintain ROHS3 compliance and automotive-grade certification where applicable.
Parameter Comparison
| Parameter | MP24893DJ-LF-Z | AL8860MP-13 | AOZ1084DI | HV9918K7-G | IS31LT3360-SDLS4-TR | LM3404MRX/NOPB | LM3414HVMRX/NOPB | LT1937ESC6#TRPBF | LT3474IFE#TRPBF | LT3477EUF#PBF | LT3592IDDB#TRPBF |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Topology | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Down (Buck) | Step-Up (Boost) | Step-Down (Buck) | Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost) | Step-Down (Buck) |
| Voltage - Supply (Min) | 6V | 4.5V | 4.5V | 4.5V | 6V | 6V | 4.5V | 2.5V | 4.6V | 2.5V | 3.6V |
| Voltage - Supply (Max) | 36V | 40V | 36V | 40V | 40V | 42V | 65V | 10V | 36V | 25V | 36V |
| Current - Output / Channel | 1A | 1.5A | 1.2A | 30mA | 1.2A (Switch) | 1A | 1A | 320mA (Switch) | 1A | 3A (Switch) | 50mA, 500mA |
| Dimming | Analog, PWM | Analog, PWM | PWM | Analog, PWM | Analog, PWM | PWM | Analog, PWM | Analog, PWM | PWM | PWM | - |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 105°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad | 8-WFDFN Exposed Pad | 8-WDFN Exposed Pad | SOT-89-5/6 | 8-PowerSOIC (0.154", 3.90mm Width) | 8-PowerSOIC (0.154", 3.90mm Width) | 6-TSSOP, SC-88, SOT-363 | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad | 20-WFQFN Exposed Pad | 10-WFDFN Exposed Pad |
| Grade | Automotive | - | - | - | Automotive | Automotive | Automotive | - | Automotive | - | - |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility):
AL8860MP-13 (Diodes Incorporated) and LM3404MRX/NOPB (Texas Instruments) are the most direct substitutes. Both maintain step-down buck topology, support 1A or greater output current, operate within the 6V to 36V supply range, and carry active product status with ROHS3 compliance. AL8860MP-13 offers 1.5A capability and extended supply voltage to 40V. LM3404MRX/NOPB provides automotive-grade certification and 1MHz switching frequency with PWM dimming.
Secondary Substitutes (Functional Equivalence with Trade-offs):
LM3414HVMRX/NOPB (Texas Instruments) extends supply voltage capability to 65V and supports both analog and PWM dimming, though it operates at 500kHz switching frequency. IS31LT3360-SDLS4-TR (Lumissil Microsystems) maintains automotive-grade certification and full dimming support but uses SOT-89-5 packaging. LT3474IFE#TRPBF (Analog Devices Inc.) supports automotive-grade operation and flexible frequency range (200kHz to 2MHz) with PWM dimming in a 16-TSSOP package.
Alternative Topologies (Limited Substitution):
LT1937ESC6#TRPBF uses step-up (boost) topology and operates at lower supply voltages (2.5V to 10V), making it unsuitable for direct replacement in 6V to 36V applications. LT3477EUF#PBF supports multiple topologies (flyback, SEPIC, buck, boost) but operates at lower maximum supply voltage (25V) and is intended for different application profiles.
Current-Limited Alternatives:
HV9918K7-G (Microchip Technology) and LT3592IDDB#TRPBF (Analog Devices Inc.) provide reduced output current (30mA and 50mA/500mA respectively) and are suitable only for low-power LED driver applications, not direct 1A replacements.
All recommended substitutes maintain ROHS3 compliance and active product status, ensuring long-term supply chain viability and regulatory compliance.
Frequently Asked Questions (FAQ)
Q: Can AL8860MP-13 directly replace MP24893DJ-LF-Z?
A: AL8860MP-13 is functionally compatible as a step-down buck regulator with 1.5A output current, analog and PWM dimming support, and ROHS3 compliance. The primary difference is package format (8-MSOP versus TSOT-23-5) and slightly lower maximum operating temperature (105°C versus 125°C). PCB layout modification is required due to different pin configuration and package dimensions.
Q: What is the key difference between LM3404MRX/NOPB and LM3414HVMRX/NOPB?
A: Both are Texas Instruments LED driver regulators with automotive-grade certification. LM3404MRX/NOPB operates at 1MHz with PWM dimming only and supports up to 42V supply. LM3414HVMRX/NOPB operates at 500kHz with both analog and PWM dimming support and extends supply voltage to 65V. Selection depends on dimming control requirements and supply voltage range in the target application.
Q: Why is LT1937ESC6#TRPBF not recommended as a direct substitute?
A: LT1937ESC6#TRPBF uses step-up (boost) topology rather than step-down (buck) topology. It is designed for applications requiring voltage elevation from lower supply levels (2.5V to 10V) to higher output levels. The MP24893DJ-LF-Z requires step-down regulation from 6V to 36V supply, making boost topology functionally incompatible.
Q: Are all substitute parts automotive-grade?
A: No. AL8860MP-13, AOZ1084DI, HV9918K7-G, and LT3477EUF#PBF do not carry automotive-grade certification. IS31LT3360-SDLS4-TR, LM3404MRX/NOPB, LM3414HVMRX/NOPB, and LT3474IFE#TRPBF maintain automotive-grade certification matching the original part. Application requirements determine whether automotive-grade certification is mandatory.
Q: What package considerations apply when selecting a substitute?
A: The MP24893DJ-LF-Z uses TSOT-23-5 (5-pin thin SOT-23), a compact surface mount package. Substitute parts use larger packages (8-MSOP, 8-DFN, SOT-89-5, 8-SO PowerPad, 16-TSSOP, 20-QFN, 10-DFN). PCB layout redesign is necessary to accommodate different pin counts, spacing, and thermal pad requirements. Verify that the target PCB has sufficient space for the selected substitute package.
Q: Can HV9918K7-G substitute for MP24893DJ-LF-Z in high-current applications?
A: No. HV9918K7-G is rated for 30mA output current, significantly below the 1A requirement of MP24893DJ-LF-Z. It is suitable only for low-power LED indicator and signage applications. For 1A or greater output current requirements, select AL8860MP-13, AOZ1084DI, IS31LT3360-SDLS4-TR, LM3404MRX/NOPB, LM3414HVMRX/NOPB, or LT3474IFE#TRPBF.
Q: What is the significance of "Not For New Designs" status on the original part?
A: "Not For New Designs" indicates the MP24893DJ-LF-Z is obsolete or being discontinued by the manufacturer. New product designs should not incorporate this part. Existing designs using this part require substitution planning to ensure continued supply chain access and production continuity. All listed substitute parts carry "Active" product status, confirming ongoing availability and manufacturer support.
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