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MP3205DJ-LF-P LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3205DJ-LF-P is an active LED driver IC manufactured by Monolithic Power Systems Inc., classified as a Power Management PMIC. This device functions as a single-output DC-DC regulator with Step-Up (Boost) topology, delivering 21V output with 350mA switch current capability. It features integrated PWM and analog dimming control, operating across a 2.5V to 6V supply range, and is optimized for backlight applications.
The MP3205DJ-LF-P is actively produced and widely available (672 units in current inventory). Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional topology to ensure direct replacement capability in existing designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Part Number | MP3205DJ-LF-P |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Package | SOT-23-5 Thin (TSOT-23-5) |
| Voltage Supply (Min) | 2.5V |
| Voltage Supply (Max) | 6V |
| Voltage Output | 21V |
| Current Output / Channel | 350mA (Switch) |
| Frequency | 1.3MHz |
| Dimming Control | Analog, PWM |
| Applications | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the MP3205DJ-LF-P are classified into two categories based on electrical and mechanical compatibility:
Parametric Equivalent (Direct Replacement): Parts sharing identical or functionally equivalent electrical specifications, topology, package format, and dimming control method. These parts maintain the same supply voltage range, output voltage, switching frequency, and control interface.
Manufacturer Recommended Alternatives: Parts with similar functional topology and application scope but differing in one or more of the following parameters: package type, output current rating, supply voltage range, output voltage specification, dimming control method, or frequency. These require design review to confirm compatibility with existing PCB layouts and control circuitry.
Key substitution criteria:
- DC-DC Regulator topology (Step-Up/Boost preferred)
- Supply voltage range compatibility (minimum 2.5V input support)
- Output voltage capability (21V or higher)
- Dimming control method (PWM and/or Analog)
- Surface mount package format
- Operating temperature range (-40°C to 85°C minimum)
- RoHS3 compliance and MSL rating
Parameter Comparison
| Part Number | Manufacturer | Topology | Package | Voltage Supply (Min-Max) | Voltage Output | Current Output | Frequency | Dimming | Temp Range | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| MP3205DJ-LF-P | Monolithic Power Systems | Step-Up (Boost) | SOT-23-5 | 2.5V - 6V | 21V | 350mA | 1.3MHz | Analog, PWM | -40°C ~ 85°C | Active |
| MP3205DJ-LF-Z | Monolithic Power Systems | Step-Up (Boost) | SOT-23-5 | 2.5V - 6V | 21V | 350mA | 1.3MHz | Analog, PWM | -40°C ~ 85°C | Active |
| LM3410YMFE/NOPB | Texas Instruments | SEPIC, Step-Up (Boost) | SOT-23-5 | 2.7V - 5.5V | 3V ~ 24V | 2.8A | 525kHz | PWM | -40°C ~ 125°C | Active |
| LM3410YSDE/NOPB | Texas Instruments | SEPIC, Step-Up (Boost) | 6-WSON (3x3) | 2.7V - 5.5V | 3V ~ 24V | 2.8A | 525kHz | PWM | -40°C ~ 125°C | Active |
| LM3530TME-40/NOPB | Texas Instruments | Step-Up (Boost) | 12-DSBGA | 2.7V - 5.5V | 40V | 30mA | 500kHz | PWM | -40°C ~ 85°C | Active |
| LT1937ESC6#TRMPBF | Analog Devices Inc. | Step-Up (Boost) | SC-70-6 | 2.5V - 10V | 36V | 320mA | 1.2MHz | Analog, PWM | -40°C ~ 85°C | Active |
| AP5726WG-7 | Diodes Incorporated | Step-Up (Boost) | SOT-26 | 2.7V - 5.5V | Not Specified | 750mA | 1.2MHz | PWM | -40°C ~ 85°C | Active |
| CAT4137TD-GT3 | onsemi | Step-Up (Boost) | SOT-23-5 | 2.2V - 5.5V | 24V | 30mA | 1MHz | Analog, PWM | -40°C ~ 85°C | Last Time Buy |
| ADP1650ACBZ-R7 | Analog Devices Inc. | Step-Up (Boost) | 12-WLCSP (1.5x2) | 2.7V - 5V | 4.575V ~ 5.425V | 1.5A (Flash) | 1.5MHz, 3MHz | I2C | -40°C ~ 85°C | Active |
| BD60910GU-E2 | ROHM Semiconductor | Step-Up (Boost) | 24-VFBGA (VCSP85H3) | 2.7V - 5.5V | Not Specified | 25.6mA | 1MHz | PWM | -40°C ~ 85°C | Not For New Designs |
| LM3406HVMH/NOPB | Texas Instruments | Step-Down (Buck) | 14-HTSSOP | 6V - 75V | Not Specified | 1.5A | 10kHz ~ 1MHz | PWM | -40°C ~ 125°C | Active |
Engineering Selection Recommendations
Direct Replacement (Parametric Equivalent):
MP3205DJ-LF-Z is the parametric equivalent of MP3205DJ-LF-P, differing only in packaging designation. Both parts are manufactured by Monolithic Power Systems Inc., share identical electrical specifications, and are actively produced. This part is suitable for direct substitution without design modification.
Recommended Alternatives for Active Designs:
LM3410YMFE/NOPB (Texas Instruments) and LM3410YSDE/NOPB (Texas Instruments) are active alternatives offering higher output current (2.8A vs. 350mA) and extended temperature range (-40°C to 125°C). Both support PWM dimming and Step-Up/SEPIC topology. LM3410YMFE/NOPB maintains SOT-23-5 package compatibility; LM3410YSDE/NOPB uses 6-WSON package. These parts require PCB layout verification due to package differences.
LT1937ESC6#TRMPBF (Analog Devices Inc.) provides comparable performance with 320mA output current, analog and PWM dimming support, and extended supply voltage range (2.5V to 10V). Package format is SC-70-6, requiring PCB redesign.
LM3530TME-40/NOPB (Texas Instruments) offers higher output voltage (40V) with reduced output current (30mA) in 12-DSBGA package. Suitable for applications requiring higher voltage output with lower current demands.
Not Recommended for New Designs:
CAT4137TD-GT3 (onsemi) carries "Last Time Buy" status and is not recommended for new design implementations. BD60910GU-E2 (ROHM Semiconductor) is marked "Not For New Designs" and should not be selected for production applications.
Topology Mismatch:
LM3406HVMH/NOPB (Texas Instruments) uses Step-Down (Buck) topology, fundamentally different from the MP3205DJ-LF-P Step-Up (Boost) architecture. This part is not suitable as a substitute despite similar application scope.
Limited Application Compatibility:
ADP1650ACBZ-R7 (Analog Devices Inc.) is optimized for camera flash applications with I2C dimming control and restricted output voltage range (4.575V to 5.425V). This part is not compatible with backlight applications requiring 21V output.
Frequently Asked Questions (FAQ)
Q: Can MP3205DJ-LF-Z be used as a direct replacement for MP3205DJ-LF-P?
A: Yes. Both parts are manufactured by Monolithic Power Systems Inc. and share identical electrical specifications, topology, package format (SOT-23-5), and operating characteristics. The difference is packaging designation only. No design modification is required.
Q: What is the primary difference between the MP3205DJ-LF-P and LM3410YMFE/NOPB?
A: The LM3410YMFE/NOPB offers higher output current capability (2.8A vs. 350mA) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Both maintain SOT-23-5 package compatibility and support PWM dimming. The LM3410 uses SEPIC topology in addition to Step-Up, providing greater design flexibility. Output voltage range is also wider (3V to 24V vs. fixed 21V).
Q: Can I use LM3530TME-40/NOPB as a substitute?
A: LM3530TME-40/NOPB is functionally compatible for Step-Up (Boost) topology and backlight applications. However, it delivers 40V output with only 30mA current, compared to the MP3205DJ-LF-P's 21V at 350mA. This part is suitable only if your application requires higher output voltage with significantly lower current demand. Package format differs (12-DSBGA vs. SOT-23-5), requiring PCB redesign.
Q: Why is ADP1650ACBZ-R7 not recommended as a substitute?
A: The ADP1650ACBZ-R7 is optimized for camera flash applications with I2C digital dimming control and restricted output voltage range (4.575V to 5.425V). The MP3205DJ-LF-P is designed for backlight applications with 21V output. These parts serve fundamentally different applications and are not interchangeable.
Q: What does "Last Time Buy" status mean for CAT4137TD-GT3?
A: "Last Time Buy" indicates the manufacturer has announced end-of-life for this part. No new production is planned, and existing inventory is limited. This part should not be selected for new designs or long-term production applications.
Q: Is LM3406HVMH/NOPB a suitable alternative?
A: No. LM3406HVMH/NOPB uses Step-Down (Buck) topology, which is fundamentally different from the MP3205DJ-LF-P's Step-Up (Boost) architecture. Buck regulators reduce voltage, while Boost regulators increase voltage. These topologies are not interchangeable and serve different circuit requirements.
Q: What package considerations should I evaluate when selecting a substitute?
A: The MP3205DJ-LF-P uses SOT-23-5 package. Direct substitutes maintaining this package (MP3205DJ-LF-Z, LM3410YMFE/NOPB) require no PCB layout changes. Alternatives using different packages (LM3410YSDE/NOPB in 6-WSON, LT1937ESC6#TRMPBF in SC-70-6, LM3530TME-40/NOPB in 12-DSBGA) require PCB redesign, including trace routing, thermal management, and component placement verification.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry RoHS3 compliance certification, matching the MP3205DJ-LF-P's environmental compliance status. MSL ratings are 1 (Unlimited) for most parts, with BD60910GU-E2 rated MSL 6 (Time on Label), requiring different moisture handling procedures.
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