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MP3352DQ-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3352DQ-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 package.
The MP3352DQ-LF-Z carries a "Not For New Designs" product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support ongoing production requirements for existing applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MP3352DQ-LF-Z |
| Manufacturer | Monolithic Power Systems Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Flyback |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 3V |
| Voltage - Supply (Max) | 6V |
| Voltage - Output | 60V |
| Internal Switch(s) | Yes |
| Package / Case | 16-VFQFN Exposed Pad |
| Operating Temperature | -40°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Not For New Designs |
Substitute Part Grouping Explanation
Substitution of the MP3352DQ-LF-Z is determined by the following critical parameters:
Primary Substitution Criteria:
- DC DC Regulator type with internal switching capability
- Single output configuration
- Input voltage range compatibility (3V to 6V minimum requirement)
- Output voltage capability (60V or higher)
- Flyback topology or equivalent high-voltage conversion topology
- Surface mount packaging suitable for 16-QFN or compatible footprints
- Operating temperature range of -40°C to 85°C or wider
- RoHS3 compliance and MSL rating
Substitution Logic: The MP3352DQ-LF-Z is optimized for camera flash applications requiring high-voltage output from low-voltage input. Substitute parts must support Flyback topology or alternative topologies (SEPIC, Step-Up/Boost) capable of achieving 60V output from 3V-6V input. Parts with higher input voltage ranges, higher output capabilities, or enhanced dimming features are acceptable substitutes provided they maintain functional compatibility with the original application requirements.
Parameter Comparison
| Parameter | MP3352DQ-LF-Z | LT3955IUHE#PBF | LT3956IUHE#PBF | MAX1910EUB+T | LT1932ES6#TRPBF | LT3590ESC8#TRPBF |
|---|---|---|---|---|---|---|
| Manufacturer | MPS | Analog Devices | Analog Devices | Analog Devices/Maxim | Analog Devices | Analog Devices |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Flyback | Flyback, SEPIC, Buck, Boost | Flyback, SEPIC, Buck, Boost | Switched Capacitor | Step-Up (Boost) | Step-Down (Buck) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 3V | 4.5V | 4.5V | 2.7V | 1V | 4.5V |
| Voltage - Supply (Max) | 6V | 60V | 80V | 5.3V | 10V | 55V |
| Voltage - Output | 60V | Not Specified | 80V | Not Specified | 36V | 55V |
| Internal Switch(s) | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TJ) |
| Package / Case | 16-VFQFN Exposed Pad | 36-WFQFN Exposed Pad | 36-WFQFN Exposed Pad | 10-TFSOP/MSOP | SOT-23-6 Thin | 8-VFSOP |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes for Direct Replacement:
LT3955IUHE#PBF and LT3956IUHE#PBF are the most functionally aligned substitutes. Both support Flyback topology with SEPIC, Buck, and Boost capabilities, enabling flexible high-voltage output generation. The LT3956IUHE#PBF offers superior output voltage capability (80V) compared to the MP3352DQ-LF-Z (60V). Both devices are Active status products with extended operating temperature ranges (-40°C to 125°C), providing enhanced reliability for production environments. These parts are available in 36-QFN packages, requiring PCB layout modifications from the original 16-QFN design.
Secondary Substitutes for Specific Applications:
LT1932ES6#TRPBF provides Step-Up (Boost) topology with 36V output capability and operates from 1V minimum input, offering broader input voltage flexibility. This part is suitable for applications where the 60V output requirement can be met through external transformer design or where lower output voltages are acceptable. The SOT-23-6 package enables compact implementations.
LT3590ESC8#TRPBF supports Step-Down (Buck) topology with 55V output and operates from 4.5V to 55V input range. This part is applicable where input voltage exceeds 4.5V and output voltage requirements align with 55V capability.
MAX1910EUB+T employs Switched Capacitor (Charge Pump) topology, limiting output voltage capability but providing compact 10-uMAX/uSOP packaging. This substitute is suitable only for applications where output voltage requirements are lower than the original specification.
Compliance and Availability:
All recommended substitutes maintain ROHS3 compliance and MSL ratings compatible with standard manufacturing processes. LT3955IUHE#PBF and LT3956IUHE#PBF carry Active product status, ensuring long-term availability and manufacturing support. Inventory levels for these parts exceed 1,400 units, supporting production continuity.
Frequently Asked Questions (FAQ)
Q: Can LT3955IUHE#PBF directly replace MP3352DQ-LF-Z without circuit modifications?
A: LT3955IUHE#PBF is functionally compatible but requires circuit design review. The LT3955 supports multiple topologies (Flyback, SEPIC, Buck, Boost) and operates from 4.5V to 60V input, compared to the MP3352's 3V to 6V range. The 36-QFN package differs from the original 16-QFN, requiring PCB layout changes. Application-specific transformer and feedback network design must be validated for the target 60V output specification.
Q: What is the key difference between LT3956IUHE#PBF and LT3955IUHE#PBF?
A: Both parts support identical topologies and packaging. The primary difference is maximum input voltage: LT3956 supports 80V input versus LT3955's 60V input. For applications requiring 60V output from 3V-6V input, both parts are functionally equivalent. The LT3956 provides additional headroom for higher input voltage applications.
Q: Is MAX1910EUB+T suitable for camera flash applications?
A: MAX1910EUB+T uses Switched Capacitor (Charge Pump) topology, which limits output voltage capability and is not specified in the datasheet. This topology is optimized for backlight applications requiring lower output voltages. For camera flash requiring 60V output, this part is not recommended as a primary substitute.
Q: Why do substitute parts have different package sizes?
A: The MP3352DQ-LF-Z uses 16-QFN packaging optimized for its specific Flyback topology implementation. Substitute parts with enhanced capabilities (LT3955, LT3956) employ larger 36-QFN packages to accommodate additional control circuitry, multiple topology support, and higher current handling. Smaller packages (LT1932 in SOT-23-6, MAX1910 in 10-uMAX) are available for applications with lower power requirements or space constraints, but may not meet the full 60V output specification.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All recommended substitute parts listed carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the original MP3352DQ-LF-Z.
Q: What is the impact of operating temperature range differences?
A: The MP3352DQ-LF-Z operates from -40°C to 85°C (TA). LT3955IUHE#PBF and LT3956IUHE#PBF extend this to -40°C to 125°C (TJ), providing enhanced thermal margin and reliability in high-temperature environments. For applications operating within -40°C to 85°C, both specifications are functionally equivalent. Extended temperature range provides design flexibility for future applications.
Q: Can LT3491EDC#TRPBF be used as a substitute?
A: LT3491EDC#TRPBF supports Step-Up (Boost) topology with 27V maximum output voltage, which is insufficient for the 60V requirement of the MP3352DQ-LF-Z. This part is not recommended as a direct substitute for camera flash applications requiring 60V output. It is suitable only for applications with lower output voltage specifications.
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