MP3384LGQ-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3384LGQ-P is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 4-output DC-DC regulator with step-up (boost) topology, PWM dimming capability, and a maximum output current of 30mA per channel. The part is designed for backlight applications and operates across a supply voltage range of 3V to 25V with a 50V output capability.

Finding equivalent and substitute parts becomes necessary when the MP3384LGQ-P reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative electrical or mechanical characteristics. The substitute parts listed below maintain functional compatibility within defined parameter tolerances while offering different performance enhancements or packaging options.

Substiute Parts

MP3384LGQ-P

Monolithic Power Systems Inc.In Stock: 955MP3384LGQ-P Datasheet

Current PartRFQ

LP8551TLX/NOPB

Texas InstrumentsIn Stock: 784LP8551TLX/NOPB Datasheet

MFR RecommendedRFQ

LT3599IUH#PBF

Analog Devices Inc.In Stock: 1402LT3599IUH#PBF Datasheet

MFR RecommendedRFQ

TPS61194PWPR

Texas InstrumentsIn Stock: 1359TPS61194PWPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3384LGQ-P is determined by the following critical parameters:

Functional Requirements:

• DC-DC regulator topology with step-up (boost) capability
• 4-output configuration
• PWM dimming support
• LED driver application suitability

Electrical Compatibility Criteria:

• Supply voltage range must overlap or encompass the original 3V to 25V range
• Output voltage capability must meet or exceed 50V
• Output current per channel must be sufficient for the application (minimum 30mA)
• Operating temperature range must support the intended thermal environment

Mechanical Compatibility:

• Surface mount technology
• Package footprint compatibility with PCB design constraints

The three substitute parts listed below satisfy these core substitution criteria while introducing variations in output current capacity, frequency range, package type, and thermal specifications. Each substitute maintains the essential 4-output boost regulator topology and PWM dimming functionality required for LED driver applications.

Parameter Comparison

Engineering Selection Recommendations

All four parts—the MP3384LGQ-P and its three substitutes—maintain active product status and full ROHS3 compliance, ensuring regulatory alignment for current manufacturing and deployment scenarios.

LP8551TLX/NOPB (Texas Instruments): This substitute offers increased output current capacity (50mA per channel versus 30mA) and operates across a lower minimum supply voltage (2.7V). However, the maximum output voltage is limited to 40V, which is 10V below the MP3384LGQ-P specification. The 25-DSBGA package represents a different footprint requiring PCB redesign. Operating temperature range is narrower (-30°C to 85°C ambient) compared to the MP3384LGQ-P junction temperature specification. This part is suitable for applications where 40V output suffices and higher per-channel current is beneficial.

LT3599IUH#PBF (Analog Devices Inc.): This substitute provides the highest output current capacity (120mA per channel) and the widest supply voltage range (2.7V to 30V), exceeding the MP3384LGQ-P maximum of 25V. Output voltage reaches 44V, approaching the original 50V specification. The device supports both analog and PWM dimming, offering enhanced flexibility. The 32-QFN package is larger than the original 16-QFN, requiring additional PCB area. Operating temperature range matches the MP3384LGQ-P (-40°C to 125°C junction). This part is optimal for high-current LED driver applications requiring extended supply voltage tolerance.

TPS61194PWPR (Texas Instruments): This substitute combines SEPIC and boost topologies, enabling operation from a higher minimum supply voltage (4.5V) while supporting the widest maximum supply voltage (40V). Output current capacity is 100mA per channel, and output voltage reaches 45V. Frequency range extends to 2.2MHz maximum. The 20-HTSSOP package differs from the original 16-QFN footprint. Moisture sensitivity is rated MSL 2 (1 Year) versus MSL 1 (Unlimited) for the original part. Operating temperature range is -40°C to 125°C ambient. This part suits applications requiring higher input voltage tolerance and moderate-to-high output current.

Frequently Asked Questions (FAQ)

Q: Can the LP8551TLX/NOPB replace the MP3384LGQ-P in all applications?

A: The LP8551TLX/NOPB is functionally compatible for applications requiring output voltages up to 40V. If your design requires the full 50V output capability of the MP3384LGQ-P, this substitute is not suitable. Additionally, the 25-DSBGA package requires PCB layout modification compared to the 16-QFN original. The narrower operating temperature range (-30°C to 85°C ambient) may not support all thermal environments specified for the original part.

Q: What are the key differences between the LT3599IUH#PBF and the MP3384LGQ-P?

A: The LT3599IUH#PBF provides significantly higher output current (120mA versus 30mA per channel) and supports both analog and PWM dimming modes, whereas the MP3384LGQ-P supports PWM only. The LT3599IUH#PBF operates across a wider supply voltage range (2.7V to 30V) and achieves 44V output voltage. The package is larger (32-QFN versus 16-QFN), requiring additional board space. Both parts share the same operating temperature range and RoHS3 compliance.

Q: Is the TPS61194PWPR suitable for low-voltage input applications?

A: The TPS61194PWPR requires a minimum supply voltage of 4.5V, which is higher than the MP3384LGQ-P (3V minimum) and the other substitutes (2.7V minimum). If your application operates below 4.5V input, the TPS61194PWPR is not compatible. For applications with input voltages at or above 4.5V, this part offers enhanced performance with higher maximum supply voltage tolerance (40V) and increased output current capacity (100mA per channel).

Q: What packaging considerations apply when selecting a substitute?

A: The MP3384LGQ-P uses a 16-VFQFN package. The LP8551TLX/NOPB employs a 25-DSBGA (ball grid array), the LT3599IUH#PBF uses a 32-QFN, and the TPS61194PWPR uses a 20-HTSSOP. Each package has different footprint dimensions, pin pitch, and assembly requirements. PCB redesign is necessary when switching between package types. Verify that your manufacturing process supports the selected package technology before committing to a substitute part.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all three substitute parts—LP8551TLX/NOPB, LT3599IUH#PBF, and TPS61194PWPR—are ROHS3 compliant, matching the compliance status of the MP3384LGQ-P. All parts are also REACH unaffected and carry EAR99 export classification.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference?

A: The MP3384LGQ-P, LP8551TLX/NOPB, and LT3599IUH#PBF are rated MSL 1 (Unlimited), meaning they have no moisture sensitivity restrictions and can be stored indefinitely without special handling. The TPS61194PWPR is rated MSL 2 (1 Year), requiring controlled storage conditions and limiting shelf life to one year from the date of manufacture. For applications with extended inventory holding periods, MSL 1 parts offer logistical advantages.