MP3386DR-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3386DR-LF-P is a 6-output LED driver IC manufactured by Monolithic Power Systems Inc., featuring a step-up (boost) DC-DC regulator topology with PWM dimming capability. This device is classified as not for new designs, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this LED driver architecture.

Substiute Parts

MP3386DR-LF-P

Monolithic Power Systems Inc.In Stock: 958MP3386DR-LF-P Datasheet

Current PartRFQ

MP3388SGR-P

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

MFR RecommendedRFQ

ISL78171ARZ-T7A

Renesas Electronics CorporationIn Stock: 1249ISL78171ARZ-T7A Datasheet

MFR RecommendedRFQ

LP8552TLE-E04/NOPB

Texas InstrumentsIn Stock: 1300LP8552TLE-E04/NOPB Datasheet

MFR RecommendedRFQ

LP8556SQ-E09/NOPB

Texas InstrumentsIn Stock: 4251LP8556SQ-E09/NOPB Datasheet

MFR RecommendedRFQ

LP8556TMX-E03/NOPB

Texas InstrumentsIn Stock: 2170LP8556TMX-E03/NOPB Datasheet

MFR RecommendedRFQ

LP8556TMX-E06/NOPB

Texas InstrumentsIn Stock: 9321LP8556TMX-E06/NOPB Datasheet

MFR RecommendedRFQ

TPS61181ARTER

Texas InstrumentsIn Stock: 3398TPS61181ARTER Datasheet

MFR RecommendedRFQ

TPS61181RTER

Texas InstrumentsIn Stock: 4468TPS61181RTER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3386DR-LF-P is determined by the following critical parameters:

Primary Substitution Criteria:

• Topology: Step-Up (Boost) DC-DC regulator
• Dimming Method: PWM capability
• Application: LED backlight driver
• Number of Outputs: 6 outputs (primary requirement)
• Output Voltage: 50V nominal or compatible range
• Current per Channel: 30mA or higher capacity
• Package Type: Surface mount QFN variants
• Supply Voltage Range: Minimum 4.5V input compatibility

Secondary Compatibility Factors:

• Operating temperature range overlap
• RoHS3 compliance
• MSL rating compatibility
• Internal switch integration

Substitute parts are grouped based on output count, current capacity, and voltage specifications. Parts with 6 outputs and 30mA+ per-channel current represent direct functional equivalents. Parts with 5 or 8 outputs, or different current ratings, are listed as functional alternatives where application-specific design adjustments may be required.

Parameter Comparison

Engineering Selection Recommendations

Direct Functional Equivalents (6 Outputs, 30mA+ Capacity):

TPS61181ARTER represents the closest functional equivalent to MP3386DR-LF-P, offering identical 6-output configuration, 30mA per-channel current capacity, and matching operating temperature range. This part is in active production status with ROHS3 compliance. The primary design consideration is the reduced output voltage (38V vs. 50V) and smaller package footprint (16-WQFN vs. 24-VFQFN), requiring PCB layout and voltage regulation circuit verification.

Alternative with Enhanced Current Capacity:

ISL78171ARZ-T7A provides 6-output configuration with superior 50mA per-channel current capacity and extended operating temperature range (-40°C to 105°C). This Renesas device includes automotive-grade qualification (AEC-Q100) and supports multiple dimming methods (Analog, I2C, PWM). Output voltage is 40V, and package is 20-VFQFN (3x4). This option is suitable for applications requiring higher current delivery or automotive compliance.

High-Current Alternative:

LP8552TLE-E04/NOPB from Texas Instruments delivers 6 outputs with significantly higher 450mA per-channel current capacity in 25-DSBGA package. This part accommodates lower input voltage (2.7V minimum) and is suitable for high-brightness LED applications. Package change from QFN to BGA requires PCB redesign.

Reduced Output Count Alternatives:

LP8556TMX-E03/NOPB and LP8556TMX-E06/NOPB both provide 5-output configuration with 50mA per-channel capacity and programmable output voltage range (7V-43V). These parts offer design flexibility but require application redesign to accommodate one fewer output channel.

Monolithic Power Systems Alternative:

MP3388SGR-P maintains the same manufacturer ecosystem and identical 24-VFQFN package. This 8-output device operates at 20mA per channel with extended temperature range (-40°C to 125°C). Selection requires verification that 8 outputs and reduced per-channel current meet application requirements.

All recommended substitutes maintain ROHS3 compliance, unlimited MSL rating, and active production status, ensuring long-term supply chain viability.

Frequently Asked Questions (FAQ)

Q: Can MP3388SGR-P directly replace MP3386DR-LF-P in existing designs?

A: MP3388SGR-P shares identical package (24-VFQFN 4x4) and manufacturer, but differs in output count (8 vs. 6) and per-channel current (20mA vs. 30mA). Direct replacement requires verification that the application can utilize 8 outputs and operate within 20mA per-channel limits. Pin-level compatibility must be confirmed against schematic documentation.

Q: What is the primary advantage of TPS61181ARTER over the original MP3386DR-LF-P?

A: TPS61181ARTER is in active production status, ensuring long-term availability. It maintains 6-output configuration and 30mA per-channel current matching the original part. The trade-off is reduced output voltage (38V vs. 50V) and smaller package size (16-WQFN vs. 24-VFQFN), which may require circuit redesign and PCB layout modifications.

Q: Are the LP8556 variants suitable substitutes despite having only 5 outputs?

A: LP8556TMX-E03/NOPB and LP8556TMX-E06/NOPB are functional alternatives for applications that can accommodate 5 LED driver outputs instead of 6. These parts offer programmable output voltage (7V-43V range) and higher per-channel current (50mA), providing design flexibility. Application redesign is required to eliminate the sixth output channel.

Q: What package considerations apply when selecting ISL78171ARZ-T7A?

A: ISL78171ARZ-T7A uses 20-VFQFN (3x4) package versus the original 24-VFQFN (4x4). This represents a smaller footprint requiring PCB layout redesign. Pin count is reduced from 24 to 20, necessitating schematic and board-level verification before implementation.

Q: Does LP8552TLE-E04/NOPB require PCB redesign?

A: Yes. LP8552TLE-E04/NOPB uses 25-DSBGA (ball grid array) package versus the original 24-VFQFN (quad flat no-lead). BGA packages require different PCB layout, via placement, and assembly processes compared to QFN packages. Full design validation is mandatory.

Q: Which substitute offers the widest operating temperature range?

A: MP3388SGR-P provides the widest temperature range (-40°C to 125°C) among Monolithic Power Systems options. ISL78171ARZ-T7A extends to -40°C to 105°C. The original MP3386DR-LF-P and most Texas Instruments alternatives operate within -40°C to 85°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original MP3386DR-LF-P specification. This ensures regulatory alignment for applications subject to RoHS requirements.

Q: What is the significance of MSL rating differences between TPS61181 variants and other substitutes?

A: Most substitutes maintain MSL 1 (unlimited shelf life). TPS61181ARTER and TPS61181RTER carry MSL 2 (1 year), requiring stricter moisture control during storage and handling. This affects component procurement, inventory management, and assembly scheduling but does not impact functional performance.