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MP3202DG-LF-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3202DG-LF-Z is an active LED Driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a Step-Up (Boost) DC DC Regulator with integrated PWM and Analog dimming capabilities, delivering 1.33A switch current for backlight applications. The part is currently in Active product status with 8481 units in stock.
Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or thermal specifications are required for specific application constraints, or when design modifications necessitate different electrical characteristics or form factors.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MP3202DG-LF-Z |
| Manufacturer | Monolithic Power Systems Inc. |
| Product Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage Supply Range | 2.5V to 6V |
| Output Voltage | 25V |
| Current Output / Channel | 1.33A (Switch) |
| Switching Frequency | 1.3MHz |
| Dimming Capability | Analog, PWM |
| Package / Case | 8-TFDFN Exposed Pad (8-QFN 2x2) |
| Operating Temperature | -40°C to 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution logic for the MP3202DG-LF-Z is based on the following critical parameters:
Primary Substitution Criteria:
- Topology: Step-Up (Boost) DC DC Regulator
- Output Voltage: 25V nominal
- Supply Voltage Range: 2.5V to 6V input compatibility
- Current Capacity: Minimum 1.33A switch current
- Dimming: PWM and/or Analog capability
- Package: Surface mount with thermal management capability
- Temperature Range: -40°C to 85°C minimum
- Compliance: ROHS3 and active product status preferred
Substitute parts are grouped into two categories:
Category 1: Parametric Equivalents — Parts with identical or superior electrical specifications and same topology, enabling direct functional replacement with minimal or no circuit modifications.
Category 2: Functional Alternatives — Parts with different topologies, current ratings, or package formats that require design evaluation but provide equivalent LED driver functionality for backlight applications.
Parameter Comparison
| Parameter | MP3202DG-LF-Z | MP3202DG-LF-P | AP5724WG-7 | AP5725WG-7 | LM3404MA/NOPB | LM3565TLE/NOPB | LT3491EDC#TRMPBF | LT3491ESC8#TRMPBF | LT3591EDDB#TRPBF |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | MPS | MPS | Diodes Inc. | Diodes Inc. | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices | Analog Devices |
| Topology | Boost | Boost | Boost | Boost | Buck | Boost | Boost | Boost | Boost |
| Supply Voltage (Min) | 2.5V | 2.5V | 2.7V | 2.7V | 6V | 2.5V | 2.5V | 2.5V | 2.5V |
| Supply Voltage (Max) | 6V | 6V | 5.5V | 5.5V | 42V | 5.5V | 12V | 12V | 12V |
| Output Voltage | 25V | 25V | — | 26V | 40V | 5.5V–8.5V | 27V | — | — |
| Current Output (Switch) | 1.33A | 1.33A | 750mA | 750mA | 1A | 930mA (Flash) | 260mA | 350mA | 500mA |
| Switching Frequency | 1.3MHz | 1.3MHz | 1.2MHz | 1.2MHz | 1MHz | 4MHz | 2.3MHz | 2.3MHz | 1MHz |
| Dimming | Analog, PWM | Analog, PWM | PWM | PWM | PWM | PWM | PWM | PWM | PWM |
| Package | 8-QFN (2x2) | 8-QFN (2x2) | SOT-26 | SOT-26 | 8-SOIC | 16-DSBGA | 6-DFN (2x2) | SC-70-8 | 8-DFN (3x2) |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | -40°C to 85°C | -40°C to 85°C | -40°C to 125°C | -30°C to 85°C | -40°C to 85°C | -40°C to 85°C | -40°C to 85°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Direct Parametric Equivalent:
MP3202DG-LF-P is the primary substitute for MP3202DG-LF-Z. Both parts share identical electrical specifications, topology, and package format. The only difference is packaging configuration (Tape & Reel vs. alternative reel format). This part is Active status and ROHS3 compliant with 1900 units in stock.
Functional Alternatives for Boost Topology Applications:
LT3591EDDB#TRPBF (Analog Devices) provides the highest current capacity among smaller-package alternatives at 500mA with Boost topology, 1MHz switching frequency, and PWM dimming. Active status, ROHS3 compliant, with 21680 units in stock.
LT3491EDC#TRMPBF (Analog Devices) offers 260mA output in 6-DFN package with 27V output voltage specification, 2.3MHz frequency, and PWM dimming. Active status, ROHS3 compliant, with 2305 units in stock.
AP5725WG-7 (Diodes Incorporated) specifies 26V output voltage with 750mA current in SOT-26 package, 1.2MHz frequency, and PWM dimming. Active status, ROHS3 compliant, with 3816 units in stock.
Topology Deviation:
LM3404MA/NOPB (Texas Instruments) uses Step-Down (Buck) topology instead of Boost, requiring circuit redesign. Specified for 6V to 42V input range and 40V output with 1A current. Automotive grade with extended temperature range to 125°C. Active status, ROHS3 compliant, with 10765 units in stock. This part is suitable only when input voltage exceeds output voltage requirements.
Application-Specific Alternative:
LM3565TLE/NOPB (Texas Instruments) is optimized for camera flash applications with 930mA flash current, 4MHz switching frequency, and 5.5V to 8.5V output range. Boost topology with PWM dimming. Active status, ROHS3 compliant, with 2276 units in stock. This part is not recommended for standard backlight applications due to specialized flash current rating and limited output voltage range.
Frequently Asked Questions (FAQ)
Q: Can MP3202DG-LF-P be used as a direct replacement for MP3202DG-LF-Z?
A: Yes. MP3202DG-LF-P is a parametric equivalent with identical electrical specifications, topology, and package. The difference is in packaging configuration only. No circuit modifications are required.
Q: What is the key difference between Boost and Buck topologies in these LED drivers?
A: Boost (Step-Up) topology increases input voltage to the output voltage level, suitable when input voltage is lower than required output. Buck (Step-Down) topology decreases input voltage, suitable when input voltage exceeds output requirements. MP3202DG-LF-Z uses Boost topology for 2.5V to 6V input to 25V output conversion. LM3404MA/NOPB uses Buck topology and requires input voltage of at least 6V.
Q: Why do some substitute parts have lower current ratings than the MP3202DG-LF-Z?
A: Lower current ratings reflect different package sizes and thermal dissipation capabilities. Smaller packages (6-DFN, SC-70-8) inherently limit maximum current handling. Selection depends on actual application current requirements. If application requires full 1.33A, only MP3202DG-LF-P or LT3591EDDB#TRPBF (500mA) with parallel configurations are suitable.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts are ROHS3 compliant and Active product status except LT3517HUF#PBF, which is Obsolete and RoHS non-compliant. LT3517HUF#PBF should not be used for new designs.
Q: What package considerations apply when selecting a substitute?
A: MP3202DG-LF-Z uses 8-QFN (2x2) package. Substitutes use different packages: 8-QFN (2x2), SOT-26, 8-SOIC, 16-DSBGA, 6-DFN, SC-70-8, and 8-DFN. Package changes require PCB layout modifications, different footprints, and potentially different thermal management approaches. Verify PCB space and thermal requirements before substitution.
Q: Can LT3491ESC8#TRMPBF replace MP3202DG-LF-Z in backlight applications?
A: LT3491ESC8#TRMPBF is functionally compatible for backlight applications with Boost topology and PWM dimming. However, its 350mA current rating is significantly lower than the 1.33A specification of MP3202DG-LF-Z. Use only if application current requirements are below 350mA. SC-70-8 package requires different PCB layout.
Q: What is the significance of the -40°C to 125°C temperature range on LM3404MA/NOPB?
A: LM3404MA/NOPB specifies extended operating temperature to 125°C (junction temperature) compared to 85°C on MP3202DG-LF-Z. This extended range is suitable for automotive and high-temperature applications. However, this part uses Buck topology and requires minimum 6V input, making it unsuitable as a direct replacement for standard backlight circuits.
Q: Why is LM3565TLE/NOPB listed as a substitute if it is optimized for camera flash?
A: LM3565TLE/NOPB shares Boost topology, PWM dimming, and compatible supply voltage range (2.5V to 5.5V). However, its 930mA flash current rating and 4MHz frequency are optimized for flash applications, not continuous backlight operation. It is listed as a functional alternative only for applications where flash-optimized characteristics are acceptable.
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