MP3388DR-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3388DR-LF-P is an 8-output LED driver IC with integrated DC-DC step-up (boost) regulator and PWM dimming capability, manufactured by Monolithic Power Systems Inc. This device is classified as not for new designs, indicating it has been superseded in the product lifecycle. The part operates from a 4.5V to 25V supply and delivers up to 50V output with 20mA per channel, making it suitable for backlight applications requiring multiple LED strings.

Due to its discontinued status for new designs, identifying functionally equivalent alternatives is essential for design continuity and long-term supply chain planning.

Substiute Parts

MP3388DR-LF-P

Monolithic Power Systems Inc.In Stock: 1679MP3388DR-LF-P Datasheet

Current PartRFQ

MP3388SGR-P

Monolithic Power Systems Inc.In Stock: 914MP3388SGR-P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP3388DR-LF-P is determined by strict equivalence across the following critical parameters:

• Topology & Function: Step-up (boost) DC-DC regulator with 8 LED driver outputs
• Electrical Specifications: Input voltage range, output voltage capability, and per-channel current rating
• Switching Frequency: 1.25MHz operation for consistent performance characteristics
• Dimming Control: PWM-based dimming functionality
• Package Compatibility: 24-VFQFN with exposed pad in 4x4mm form factor
• Compliance & Certifications: ROHS3 compliance and MSL rating

The MP3388SGR-P qualifies as a direct substitute based on identical topology, output configuration, frequency, dimming method, and package specification. Variations in supply voltage minimum (4.3V vs 4.5V) and operating temperature range represent parameter improvements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The MP3388SGR-P is the qualified substitute for MP3388DR-LF-P based on the following engineering criteria:

Product Status: The MP3388SGR-P carries Active status, ensuring continued availability and manufacturer support, whereas the MP3388DR-LF-P is designated not for new designs. This distinction is critical for long-term supply chain reliability.

Compliance & Certifications: Both parts maintain identical ROHS3 compliance, MSL rating of 1 (unlimited moisture sensitivity), and equivalent regulatory classifications (ECCN: EAR99, HTSUS: 8542.39.0001), ensuring no compliance barriers to substitution.

Electrical Compatibility: The MP3388SGR-P operates across a marginally wider input voltage range (4.3V minimum vs 4.5V minimum) and supports an extended operating temperature range (-40°C to 125°C junction temperature vs -40°C to 85°C ambient), both representing functional improvements without introducing incompatibilities.

Functional Equivalence: Identical topology, output configuration, switching frequency, and PWM dimming control ensure drop-in compatibility at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can MP3388SGR-P be used as a direct replacement for MP3388DR-LF-P in existing designs?

A: Yes. Both parts share identical topology, output configuration, switching frequency, package specification, and dimming control method. The MP3388SGR-P operates within the electrical specifications of the MP3388DR-LF-P and maintains full compliance equivalence.

Q: What is the significance of the product status difference?

A: The MP3388DR-LF-P is marked "Not For New Designs," indicating Monolithic Power Systems has transitioned this part to end-of-life status. The MP3388SGR-P carries "Active" status, confirming ongoing manufacturing and support. For new designs or long-term production, the MP3388SGR-P is the appropriate selection.

Q: Are there package compatibility concerns?

A: No. Both parts use the 24-VFQFN exposed pad package in 4x4mm form factor. PCB footprints, thermal characteristics, and mounting procedures are identical.

Q: How do the operating temperature ranges differ, and does this affect substitution?

A: The MP3388DR-LF-P specifies -40°C to 85°C ambient temperature (TA), while the MP3388SGR-P specifies -40°C to 125°C junction temperature (TJ). The MP3388SGR-P's extended range represents a capability improvement and does not restrict its use in applications designed for the original part's temperature range.

Q: Are there differences in supply voltage requirements?

A: The MP3388SGR-P accepts input voltages as low as 4.3V, compared to 4.5V minimum for the MP3388DR-LF-P. This represents an expanded operating window and poses no compatibility issues for designs operating within the original 4.5V to 25V specification.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry MSL rating 1 (unlimited), and share identical ECCN and HTSUS classifications, ensuring equivalent compliance status for procurement and deployment.