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

Part Overview

The MP3351DQ-LF-Z 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. It operates with a 3V to 6V supply voltage and delivers 60V output, housed in a 16-QFN-3-EP surface mount package.

The MP3351DQ-LF-Z carries a "Not For New Designs" product status. For new development projects, equivalent substitute parts with active product status are available. These alternatives maintain functional compatibility while offering continued manufacturer support and supply chain availability.

Substiute Parts

MP3351DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 680MP3351DQ-LF-Z Datasheet

Current PartRFQ

ADP1650ACPZ-R7

Analog Devices Inc.In Stock: 2625ADP1650ACPZ-R7 Datasheet

MFR RecommendedRFQ

LM3402HVMRX/NOPB

National SemiconductorIn Stock: 7982LM3402HVMRX/NOPB Datasheet

MFR RecommendedRFQ

LT3478EFE#PBF

Analog Devices Inc.In Stock: 1685LT3478EFE#PBF Datasheet

MFR RecommendedRFQ

LT3593EDC#TRMPBF

Analog Devices Inc.In Stock: 978LT3593EDC#TRMPBF Datasheet

MFR RecommendedRFQ

RT9269GE

Richtek USA Inc.In Stock: 792RT9269GE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP3351DQ-LF-Z are selected based on the following critical parameters that determine functional compatibility:

• Regulator Type: DC DC Regulator with internal switch
• Number of Outputs: Single output configuration
• Supply Voltage Range: Input voltage compatibility (minimum 3V, maximum 6V or higher)
• Output Voltage Capability: Ability to deliver high voltage output (60V or compatible range)
• Application Domain: LED driver functionality for camera flash or similar high-voltage LED applications
• Mounting and Package: Surface mount technology with QFN or equivalent compact packaging
• Product Status: Active status for continued design support
• Compliance: ROHS3 compliance and standard industrial certifications

The substitute parts listed below meet these criteria while offering active product status and improved supply chain availability compared to the MP3351DQ-LF-Z.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: ADP1650ACPZ-R7

The ADP1650ACPZ-R7 from Analog Devices Inc. is the most direct functional equivalent for camera flash applications. It maintains active product status, ROHS3 compliance, and MSL-1 moisture sensitivity rating. The device operates within the 2.7V to 5V supply range, overlapping with the MP3351DQ-LF-Z input specification. Both parts target camera flash applications and feature integrated switching capability. The ADP1650ACPZ-R7 is available in high inventory (2600 units) and offers I2C dimming control.

Secondary Substitute: LT3478EFE#PBF

The LT3478EFE#PBF from Analog Devices Inc. provides dual topology capability (Step-Down/Step-Up) with extended operating temperature range (-40°C to 125°C). This part supports flexible voltage conversion and maintains ROHS3 compliance with MSL-1 rating. It is suitable for applications requiring both buck and boost functionality within the 2.8V to 36V input range.

Alternative Substitute: LM3402HVMRX/NOPB

The LM3402HVMRX/NOPB from National Semiconductor is an active product designed for lighting applications. It operates across a wide supply voltage range (6V to 75V) and delivers 73V output, making it suitable for high-voltage LED driver requirements. Extended operating temperature range (-40°C to 125°C) provides thermal margin for demanding environments.

Compact Alternative: LT3593EDC#TRMPBF

The LT3593EDC#TRMPBF from Analog Devices Inc. offers a minimal footprint in 6-DFN (2x2) package with active product status and MSL-1 rating. This part is optimized for space-constrained backlight applications and operates within the 2.7V to 5.5V supply range.

Charge Pump Alternative: RT9269GE

The RT9269GE from Richtek USA Inc. employs switched capacitor (charge pump) topology with 2.5A switch current capability. This part operates across 2.5V to 6V supply range and is suitable for backlight applications where alternative conversion topologies are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the ADP1650ACPZ-R7 directly replace the MP3351DQ-LF-Z in camera flash applications?

A: The ADP1650ACPZ-R7 is functionally compatible for camera flash LED driver applications. Both parts are single-output DC DC regulators with internal switches designed for this application domain. However, the ADP1650ACPZ-R7 uses Step-Up (Boost) topology versus the MP3351DQ-LF-Z flyback topology. Circuit design modifications may be required to accommodate the different topologies and output voltage specifications (4.575V ~ 5.5V versus 60V).

Q: What is the significance of the "Not For New Designs" status on the MP3351DQ-LF-Z?

A: This status indicates that Monolithic Power Systems Inc. no longer recommends this part for new product development. The manufacturer may discontinue production or reduce support. All substitute parts listed carry "Active" product status, ensuring continued availability and manufacturer support for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: The ADP1650ACPZ-R7, LT3478EFE#PBF, LT3593EDC#TRMPBF, and RT9269GE are all ROHS3 compliant. The LM3402HVMRX/NOPB compliance status is not specified in the provided data.

Q: What is the difference between MSL-1 and MSL-3 moisture sensitivity ratings?

A: MSL-1 (Unlimited) indicates the component has unlimited shelf life under controlled storage conditions. MSL-3 (168 Hours) limits the component to 168 hours of exposure to moisture before soldering. The MP3351DQ-LF-Z, LT3478EFE#PBF, and LT3593EDC#TRMPBF carry MSL-1 ratings. The ADP1650ACPZ-R7 and RT9269GE carry MSL-3 ratings, requiring stricter moisture control during assembly.

Q: Which substitute part offers the widest operating temperature range?

A: Both the LM3402HVMRX/NOPB and LT3478EFE#PBF operate across -40°C to 125°C (TJ), providing 40°C additional margin compared to the MP3351DQ-LF-Z operating range of -40°C to 85°C (TA).

Q: Can the LM3402HVMRX/NOPB handle the same supply voltage as the MP3351DQ-LF-Z?

A: The LM3402HVMRX/NOPB requires a minimum supply voltage of 6V, which exceeds the MP3351DQ-LF-Z minimum of 3V. This part is suitable only for applications where the supply voltage is 6V or higher.

Q: What package considerations should be evaluated when selecting a substitute?

A: The MP3351DQ-LF-Z uses 16-VFQFN Exposed Pad packaging. Substitute parts employ different packages: ADP1650ACPZ-R7 (10-LFCSP-WD), LM3402HVMRX/NOPB (8-SO PowerPad), LT3478EFE#PBF (16-TSSOP-EP), LT3593EDC#TRMPBF (6-DFN), and RT9269GE (SOT-23-6). PCB layout, thermal management, and component density requirements must be reassessed for each package type.