MP3351DQ-LF-P LED Driver IC Equivalent & Substitute Parts

Part Overview

The MP3351DQ-LF-P is a LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a 1-output DC DC regulator with Flyback topology, designed for camera flash applications. The part operates with a 3V to 6V supply voltage and delivers 60V output, housed in a 16-QFN-3-EP package.

The MP3351DQ-LF-P carries a "Not For New Designs" product status, indicating it is obsolete or discontinued. This status necessitates identification of active, functionally equivalent substitute components to maintain design continuity and ensure long-term supply chain reliability.

Substiute Parts

MP3351DQ-LF-P

Monolithic Power Systems Inc.In Stock: 760MP3351DQ-LF-P Datasheet

Current PartRFQ

LM3406HVMH/NOPB

Texas InstrumentsIn Stock: 18723LM3406HVMH/NOPB Datasheet

MFR RecommendedRFQ

LM3501TL-16/NOPB

Texas InstrumentsIn Stock: 29000LM3501TL-16/NOPB Datasheet

MFR RecommendedRFQ

LT1937ESC6#TRMPBF

Analog Devices Inc.In Stock: 5415LT1937ESC6#TRMPBF Datasheet

MFR RecommendedRFQ

LT3477EFE#TRPBF

Analog Devices Inc.In Stock: 2810LT3477EFE#TRPBF Datasheet

MFR RecommendedRFQ

LT3491ESC8#TRMPBF

Analog Devices Inc.In Stock: 1920LT3491ESC8#TRMPBF Datasheet

MFR RecommendedRFQ

LT3592IDDB#TRMPBF

Analog Devices Inc.In Stock: 774LT3592IDDB#TRMPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP3351DQ-LF-P is determined by the following critical parameters:

• Topology: Flyback topology enables high-voltage output generation from low input voltage, essential for camera flash applications
• Number of Outputs: Single output configuration
• Voltage Supply Range: 3V to 6V input compatibility
• Output Voltage: 60V output capability
• Internal Switch: Integrated switching element required
• Package Compatibility: Surface mount form factor with exposed pad thermal management
• Regulatory Compliance: ROHS3 compliance and MSL-1 rating

The substitute parts listed below are selected based on their ability to function as LED driver regulators with compatible electrical characteristics and regulatory certifications. Substitutes may employ different topologies (Step-Down, Step-Up, SEPIC, or Flyback) depending on application requirements, but all maintain single-output configuration, internal switching capability, and compliance with ROHS3 and REACH standards.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed carry Active product status, ensuring ongoing availability and manufacturer support. Each substitute maintains ROHS3 compliance and REACH Unaffected designation, meeting current regulatory requirements for electronic component procurement.

The LT3477EFE#TRPBF offers the broadest topology flexibility with support for Flyback, SEPIC, Step-Down, and Step-Up configurations, accommodating diverse circuit implementations. The LT3592IDDB#TRMPBF provides the highest output voltage capability at 30V with extended supply voltage range up to 36V. The LM3501TL-16/NOPB operates with the lowest minimum supply voltage at 2.7V, suitable for battery-powered applications.

Selection among substitutes depends on specific circuit topology requirements, output voltage specifications, and thermal management constraints of the target application. All candidates maintain single-output configuration and integrated switching capability consistent with the MP3351DQ-LF-P functional requirements.

Frequently Asked Questions (FAQ)

Q: Can the MP3351DQ-LF-P be directly replaced with any of these substitutes without circuit modification?

A: Direct pin-for-pin replacement is not guaranteed due to different package types and pin configurations. The MP3351DQ-LF-P uses 16-QFN-3-EP packaging, while substitutes employ various packages including 14-HTSSOP, 8-DSBGA, SC-70-6, 20-TSSOP-EP, SC-70-8, and 10-DFN. Circuit redesign may be required to accommodate package differences and topology variations.

Q: Which substitute is most suitable for camera flash applications?

A: The LT3477EFE#TRPBF supports multiple topologies including Flyback, matching the original MP3351DQ-LF-P topology. This flexibility enables direct functional replacement in camera flash circuits. However, application-specific validation is necessary to confirm compatibility with existing circuit designs.

Q: What are the key differences in supply voltage requirements?

A: The MP3351DQ-LF-P operates with 3V to 6V input. Substitutes vary: LM3406HVMH/NOPB requires 6V minimum (incompatible with 3V operation), while LM3501TL-16/NOPB, LT1937ESC6#TRMPBF, LT3477EFE#TRPBF, and LT3491ESC8#TRMPBF all support 2.5V minimum input, providing greater flexibility for low-voltage applications.

Q: Are all substitutes rated for the same operating temperature range?

A: No. The MP3351DQ-LF-P, LT1937ESC6#TRMPBF, LT3477EFE#TRPBF, and LT3491ESC8#TRMPBF are rated -40°C to 85°C. The LM3406HVMH/NOPB, LM3501TL-16/NOPB, and LT3592IDDB#TRMPBF extend to -40°C to 125°C, offering superior thermal performance for high-temperature environments.

Q: Do all substitutes maintain the same regulatory compliance?

A: Yes. All substitute parts are ROHS3 compliant, REACH Unaffected, and carry MSL-1 (Unlimited) moisture sensitivity rating, matching the MP3351DQ-LF-P compliance profile.

Q: What output voltage capabilities do the substitutes provide?

A: The MP3351DQ-LF-P delivers 60V output. Substitutes provide: LM3501TL-16/NOPB (16V), LT1937ESC6#TRMPBF (36V), and LT3592IDDB#TRMPBF (30V). The LM3406HVMH/NOPB and LT3477EFE#TRPBF do not specify fixed output voltage, allowing configurable output through external components.