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MP3356DG-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3356DG-LF-Z is a LED Driver IC manufactured by Monolithic Power Systems, designed for single-output DC-DC regulation in flyback topology with internal switching capability. This device is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. The part operates across a 2.8V to 6V supply range and delivers 50V output, making it suitable for camera flash applications. Due to its discontinued status for new designs, identifying functionally equivalent alternatives is essential for ongoing production support and design flexibility.
Substiute Parts
Key Parameters
| Parameter | MP3356DG-LF-Z |
|---|---|
| Manufacturer | Monolithic Power Systems |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Flyback |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 2.8V |
| Voltage Supply (Max) | 6V |
| Voltage Output | 50V |
| Internal Switch(s) | Yes |
| Package / Case | 10-TFQFN (2x2) |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Not For New Designs |
Substitute Part Grouping Explanation
Substitution of the MP3356DG-LF-Z is determined by the following critical parameters:
Primary Substitution Criteria:
- Single output DC-DC regulator topology (Flyback, Step-Up, Step-Down, or SEPIC)
- Internal integrated switch capability
- Supply voltage range compatibility (minimum 2.8V to 6V overlap)
- Output voltage capability (50V or higher for high-voltage applications)
- Surface mount packaging with thermal management
- Operating temperature range (-40°C to 85°C or wider)
- ROHS3 compliance and EAR99 classification
Secondary Compatibility Factors:
- Package footprint considerations (10-QFN vs. alternative packages)
- Dimming capability (analog or PWM)
- Application alignment (camera flash, backlight, lighting)
- Product status (Active preferred over Not For New Designs)
The substitute parts listed below meet these criteria through equivalent or superior electrical specifications and active product status, enabling direct functional replacement in camera flash and LED driver applications.
Parameter Comparison
| Parameter | MP3356DG-LF-Z | AP5724FDCG-7 | ISL97634ART26Z-TK | LED2000DR | LT3519IMS#PBF | LTC3215EDD#PBF | MAX1848ETA+T | MIC2292-15YML-TR | MIC3201YME-TR | TPS61165DBVT |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Monolithic Power Systems | Diodes Incorporated | Renesas Electronics | STMicroelectronics | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc./Maxim | Microchip Technology | Microchip Technology | Texas Instruments |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Flyback | Step-Up (Boost) | Output Dimming | Step-Down (Buck) | SEPIC, Step-Down (Buck), Step-Up (Boost) | Switched Capacitor (Charge Pump) | Step-Up (Boost) | Step-Up (Boost) | Step-Down (Buck) | Step-Up (Boost) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Internal Switch(s) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Voltage Supply (Min) | 2.8V | 2.7V | - | 3V | 3V | 2.9V | 2.6V | 2.5V | 6V | 3V |
| Voltage Supply (Max) | 6V | 5.5V | - | 18V | 30V | 4.4V | 5.5V | 10V | 20V | 18V |
| Voltage Output | 50V | - | - | - | - | - | 12.2V | - | - | 3V ~ 38V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | - | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
All substitute parts listed are ROHS3 compliant and classified as EAR99, matching the regulatory and compliance profile of the MP3356DG-LF-Z. The primary distinction between the main part and substitutes is product status: the MP3356DG-LF-Z is designated Not For New Designs, while all listed alternatives maintain Active status, ensuring ongoing manufacturer support, availability, and supply chain stability.
Selection Basis by Application:
For camera flash applications requiring high-voltage output (50V), the MP3356DG-LF-Z topology (Flyback) is specialized. Direct topology equivalents are limited in the substitute list. However, alternative topologies (Step-Up, SEPIC, Switched Capacitor) can achieve comparable output voltage through different circuit configurations. TPS61165DBVT (Step-Up, 3V-38V output) and LT3519IMS#PBF (SEPIC topology, 3V-30V supply) offer the broadest voltage flexibility for high-voltage LED driver applications.
For backlight and general lighting applications, MAX1848ETA+T, MIC2292-15YML-TR, and TPS61165DBVT provide Step-Up (Boost) topology with active product status and proven thermal management in compact packages.
For step-down (buck) regulation in higher supply voltage environments, MIC3201YME-TR (6V-20V supply, 1A switch) and LED2000DR (3V-18V supply, 3A switch) are suitable alternatives with extended temperature ranges.
Frequently Asked Questions (FAQ)
Q: Can the MP3356DG-LF-Z be directly replaced with any of these substitutes without circuit modification?
A: Direct pin-for-pin replacement is not guaranteed due to differences in package footprint (10-QFN vs. 6-DFN, 8-SOIC, 8-TDFN, 10-DFN, 16-MSOP, SOT-23-6) and topology variations. Circuit redesign may be required to accommodate alternative topologies (Flyback vs. Step-Up, Buck, or SEPIC). Consult device datasheets for pinout, control signal requirements, and external component specifications.
Q: Why is the MP3356DG-LF-Z marked "Not For New Designs"?
A: This designation indicates the part has reached end-of-life in the manufacturer's product roadmap. Existing inventory remains available for legacy production support, but new designs should transition to active alternatives. All listed substitutes carry Active status, ensuring long-term availability and manufacturer technical support.
Q: Which substitute is best for camera flash applications?
A: Camera flash applications require high-voltage output (50V+) with compact form factor. LT3519IMS#PBF (SEPIC topology, 3V-30V supply, 16-MSOP package) and TPS61165DBVT (Step-Up, 3V-38V output, SOT-23-6 package) are candidates. However, the original Flyback topology of the MP3356DG-LF-Z is optimized for this application. Detailed circuit analysis and transformer design are necessary when switching topologies.
Q: What are the key differences between Flyback, Step-Up (Boost), and SEPIC topologies for LED drivers?
A: Flyback topology (MP3356DG-LF-Z) uses transformer isolation and is efficient for high-voltage, low-current outputs. Step-Up (Boost) topology (MAX1848ETA+T, MIC2292-15YML-TR, TPS61165DBVT) steps up input voltage with a single inductor, suitable for backlight applications. SEPIC topology (LT3519IMS#PBF) combines step-up and step-down capability, offering flexibility across wide input voltage ranges. Selection depends on input/output voltage requirements, isolation needs, and efficiency targets.
Q: Are all substitutes compatible with the same PCB footprint?
A: No. Package differences require PCB redesign. The MP3356DG-LF-Z uses 10-TFQFN (2x2), while substitutes span 6-UDFN, 8-SOIC, 8-TDFN, 10-DFN, 16-MSOP, and SOT-23-6 packages. Verify land pattern compatibility and thermal pad requirements before layout.
Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?
A: MSL 1 (Unlimited) indicates the part can be stored indefinitely without moisture baking. MSL 2 (1 Year) requires moisture baking before reflow if storage exceeds one year. Most substitutes carry MSL 1, matching the MP3356DG-LF-Z. ISL97634ART26Z-TK carries MSL 2, requiring additional handling precautions.
Q: Can I use a Step-Down (Buck) topology substitute for a Flyback application?
A: No. Step-Down topology (MIC3201YME-TR, LED2000DR) requires input voltage higher than desired output voltage and cannot generate 50V output from a 2.8V-6V supply. Buck regulators are suitable only for applications where output voltage is lower than input voltage.
Q: Which substitutes offer the widest operating temperature range?
A: LED2000DR (STMicroelectronics) supports -40°C to 150°C (TJ), the widest range. LT3519IMS#PBF and MIC2292-15YML-TR support -40°C to 125°C (TJ). Most others support -40°C to 85°C (TA), matching the original part.
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