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MP3304CDD-LF-P LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3304CDD-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 Step-Up (Boost) topology, delivering 1.33A switch current at 18V output with PWM dimming capability for backlight applications. The part is marked as "Not For New Designs," making identification of equivalent and substitute components essential for ongoing production support, legacy system maintenance, and design flexibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MP3304CDD-LF-P |
| Manufacturer | Monolithic Power Systems Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage Supply Range | 3V to 6V |
| Voltage Output | 18V |
| Current Output / Channel | 1.33A (Switch) |
| Switching Frequency | 2.2MHz |
| Dimming Method | PWM |
| Package / Case | 8-TFDFN Exposed Pad |
| Supplier Device Package | 8-QFN (2x3) |
| Operating Temperature | -40°C to 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the MP3304CDD-LF-P is determined by the following critical parameters:
Primary Substitution Criteria:
- DC-DC Regulator topology (Step-Up/Boost configuration)
- Single output channel
- Input voltage range compatibility (3V to 6V minimum requirement)
- Output voltage capability (18V or higher)
- Current handling capacity (1.33A or greater switch current)
- PWM dimming capability
- Surface mount package compatibility
- Operating temperature range (-40°C to 85°C minimum)
- RoHS3 compliance and MSL Level 1 rating
Parametric Equivalent Classification: Parts meeting all primary criteria with identical or superior electrical specifications are classified as parametric equivalents. The MP3304CDD-LF-Z (same manufacturer, identical specifications, higher inventory) qualifies as a direct parametric equivalent.
Manufacturer Recommended Alternatives: Parts from alternative manufacturers (Diodes Incorporated, ROHM Semiconductor, Texas Instruments, Analog Devices Inc.) are included when they satisfy the core functional requirements of boost topology, PWM dimming, and backlight application suitability, though they may differ in package type, current rating, or frequency characteristics.
Parameter Comparison
| Part Number | Manufacturer | Topology | Supply Voltage (Min-Max) | Output Voltage | Current Output | Frequency | Dimming | Package | Temp Range | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| MP3304CDD-LF-P | Monolithic Power Systems | Step-Up (Boost) | 3V - 6V | 18V | 1.33A | 2.2MHz | PWM | 8-QFN (2x3) | -40°C to 85°C | Not For New Designs |
| MP3304CDD-LF-Z | Monolithic Power Systems | Step-Up (Boost) | 3V - 6V | 18V | 1.33A | 2.2MHz | PWM | 8-QFN (2x3) | -40°C to 85°C | Not For New Designs |
| AP5724WG-7 | Diodes Incorporated | Step-Up (Boost) | 2.7V - 5.5V | Not Specified | 750mA | 1.2MHz | PWM | SOT-23-6 | -40°C to 85°C | Active |
| BD6164GUT-E2 | ROHM Semiconductor | Step-Up (Boost) | 2.7V - 4.5V | 4.7V | 320mA (Flash) | 4MHz | I2C | 6-VCSP60N1 | -30°C to 85°C | Active |
| LM3405AXMKX/NOPB | Texas Instruments | Step-Down (Buck) | 3V - 22V | Not Specified | 1A | 1.6MHz | PWM | SOT-23-6 | -40°C to 125°C | Active |
| LM3530UMX-25A/NOPB | Texas Instruments | Step-Up (Boost) | 2.7V - 5.5V | 40V | 30mA | 500kHz | PWM | 12-DSBGA | -40°C to 85°C | Active |
| LT1932ES6#TRMPBF | Analog Devices Inc. | Step-Up (Boost) | 1V - 10V | 36V | 40mA | 1.2MHz | PWM | SOT-23-6 | -40°C to 85°C | Active |
| LT3478EFE#TRPBF | Analog Devices Inc. | Step-Down (Buck), Step-Up (Boost) | 2.8V - 36V | 42V | 4.5A (Switch) | 200kHz - 2.25MHz | PWM | 16-TSSOP-EP | -40°C to 125°C | Active |
| LT3498EDDB#TRMPBF | Analog Devices Inc. | Step-Up (Boost) | 2.5V - 12V | 32V | 20mA | 2.3MHz | Analog, PWM | 12-DFN (3x2) | -40°C to 85°C | Active |
| LT3517EUF#TRPBF | Analog Devices Inc. | Step-Down (Buck), Step-Up (Boost) | 3V - 30V | Not Specified | 1.5A (Switch) | 250kHz - 2.5MHz | Analog, PWM | 16-QFN (4x4) | -40°C to 125°C | Active |
| LT3519EMS#PBF | Analog Devices Inc. | SEPIC, Step-Down (Buck), Step-Up (Boost) | 3V - 30V | Not Specified | 750mA (Switch) | 400kHz | Analog, PWM | 16-MSOP | -40°C to 125°C | Active |
Engineering Selection Recommendations
Direct Parametric Equivalent: MP3304CDD-LF-Z is the recommended first choice for direct substitution. This part maintains identical electrical specifications, topology, package configuration, and operating parameters as the MP3304CDD-LF-P. Both parts are ROHS3 compliant with MSL Level 1 rating. The primary distinction is higher inventory availability (18,013 pcs vs. 889 pcs) and identical product status classification.
Active Status Alternatives: When the MP3304CDD-LF-Z is unavailable, active-status alternatives from Analog Devices Inc. provide superior long-term availability and design support. LT3478EFE#TRPBF and LT3517EUF#TRPBF offer enhanced specifications including higher current capacity (4.5A and 1.5A respectively), extended temperature ranges to 125°C, and dual-topology capability (Buck-Boost). These parts require circuit redesign validation due to package differences and expanded feature sets.
Current-Limited Alternatives: AP5724WG-7 (Diodes Incorporated) and LM3530UMX-25A/NOPB (Texas Instruments) are boost-topology alternatives with PWM dimming suitable for backlight applications. However, AP5724WG-7 provides only 750mA output current (56% of MP3304CDD-LF-P rating), and LM3530UMX-25A/NOPB delivers only 30mA (2.3% of required current). These parts are applicable only for reduced-power backlight implementations.
Not Recommended: BD6164GUT-E2 (ROHM Semiconductor) is optimized for camera flash applications with I2C dimming control and 320mA flash current, differing significantly from backlight PWM requirements. LM3405AXMKX/NOPB employs Step-Down (Buck) topology, incompatible with the required 3V-6V input to 18V output boost conversion.
All recommended alternatives maintain ROHS3 compliance and MSL Level 1 moisture sensitivity ratings consistent with the original part.
Frequently Asked Questions (FAQ)
Q: Can MP3304CDD-LF-Z be used as a direct replacement for MP3304CDD-LF-P? A: Yes. MP3304CDD-LF-Z is a parametric equivalent with identical electrical specifications, topology, package, and operating temperature range. Both parts are classified as "Not For New Designs" with ROHS3 compliance and MSL Level 1 rating. The only difference is inventory availability.
Q: What is the minimum output current requirement for a valid substitute? A: The MP3304CDD-LF-P delivers 1.33A switch current at 18V output. Substitutes must support at least 1.33A continuous current capacity to maintain equivalent power delivery. Parts with lower current ratings (such as AP5724WG-7 at 750mA) are suitable only for reduced-power applications and require circuit validation.
Q: Why is LM3405AXMKX/NOPB not recommended despite similar specifications? A: LM3405AXMKX/NOPB employs Step-Down (Buck) topology, which reduces voltage from a higher input to a lower output. The MP3304CDD-LF-P requires Step-Up (Boost) topology to elevate 3V-6V input to 18V output. These topologies are functionally incompatible for this application.
Q: Are package differences between substitutes significant? A: Yes. The MP3304CDD-LF-P uses 8-QFN (2x3) package. Alternatives such as AP5724WG-7 (SOT-23-6), BD6164GUT-E2 (6-VCSP60N1), and LT3478EFE#TRPBF (16-TSSOP-EP) require PCB layout redesign, different footprints, and potentially modified thermal management. Package compatibility must be verified before implementation.
Q: What is the significance of "Not For New Designs" status? A: This designation indicates the MP3304CDD-LF-P is in mature/legacy phase with no active development. Substitution with active-status parts (such as Analog Devices alternatives) is recommended for new production to ensure long-term supply chain stability and manufacturer support.
Q: Can LT3478EFE#TRPBF or LT3517EUF#TRPBF replace the MP3304CDD-LF-P? A: These parts offer superior specifications (higher current, extended temperature range to 125°C, dual topology capability) and active product status. However, they require full circuit redesign due to different package types, pin configurations, and control interfaces. They are suitable as long-term alternatives for new designs but not direct drop-in replacements.
Q: What dimming control differences exist between substitutes? A: The MP3304CDD-LF-P uses PWM (Pulse Width Modulation) dimming. Most active alternatives (LT3478EFE#TRPBF, LT3517EUF#TRPBF, LT3519EMS#PBF) support both Analog and PWM dimming, providing design flexibility. BD6164GUT-E2 uses I2C digital control, requiring different firmware implementation. Dimming method compatibility must be verified against system requirements.
Q: Are all substitutes ROHS3 compliant? A: Yes. All parts listed in this reference maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, consistent with the original MP3304CDD-LF-P specification.
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