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MP3310NGQ-P LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3310NGQ-P is an active LED driver IC manufactured by Monolithic Power Systems Inc., designed for backlight applications requiring step-up (boost) DC-DC regulation with PWM dimming control. This device integrates a 1.3A internal switch, operates across a 4.5V to 25V supply range, and delivers up to 50V output in a compact 10-QFN (3x3) package. The part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), making it suitable for high-reliability applications. Equivalent and substitute parts are identified based on matching functional topology, output current capability, dimming methodology, and package compatibility to ensure direct or near-direct circuit board replacement.
Substiute Parts
Key Parameters
| Parameter | MP3310NGQ-P |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 4.5V |
| Voltage Supply (Max) | 25V |
| Voltage Output | 50V |
| Current Output / Channel | 1.3A (Switch) |
| Frequency | 1MHz |
| Dimming | PWM |
| Applications | Backlight |
| Operating Temperature | -20°C ~ 125°C (TJ) |
| Package / Case | 10-VFDFN Exposed Pad |
| Supplier Device Package | 10-QFN (3x3) |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution of the MP3310NGQ-P is determined by the following critical parameters:
Primary Substitution Criteria:
- Topology: Step-Up (Boost) DC-DC regulation with internal switch
- Dimming Control: PWM-based brightness modulation
- Output Current Capability: Minimum 1.3A switch current
- Supply Voltage Range: Compatibility with 4.5V to 25V input
- Package Form Factor: 10-QFN (3x3) or equivalent surface-mount packages
- Operating Temperature: Support for -20°C to 125°C junction temperature range
- Compliance: ROHS3 and REACH compliance maintained
Secondary Compatibility Factors:
- Internal switch integration (required)
- Single output configuration
- Switching frequency near 1MHz
- Backlight application suitability
Substitute parts are grouped into two categories: Direct Package Equivalents (10-QFN form factor, backlight-optimized) and Functional Equivalents (alternative packages with matching electrical performance for backlight applications).
Parameter Comparison
| Parameter | MP3310NGQ-P | AP3031KTR-G1 | AP3019AKTR-G1 | IS31BL3508A-STLS2-TR | ADP1650ACPZ-R7 | LM3642TLE/NOPB | LT3517IUF#PBF |
|---|---|---|---|---|---|---|---|
| Manufacturer | MPS | Diodes Inc. | Diodes Inc. | Lumissil | Analog Devices | Texas Instruments | Analog Devices |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Down/Step-Up |
| Voltage Supply (Min) | 4.5V | 2.7V | 2.5V | 2.7V | 2.7V | 2.5V | 3V |
| Voltage Supply (Max) | 25V | 16V | 16V | 5.5V | 5V | 5.5V | 30V |
| Voltage Output | 50V | — | — | — | 4.575V ~ 5.5V | 5V | — |
| Current Output / Channel | 1.3A (Switch) | 1.4A (Switch) | 550mA (Switch) | 1.6A (Switch) | 1.5A (Flash) | 1.5A (Flash) | 1.5A (Switch) |
| Frequency | 1MHz | 1MHz | 1.2MHz | 1MHz | 1.5MHz, 3MHz | 4MHz | 250kHz ~ 2.5MHz |
| Dimming | PWM | PWM | PWM | Analog, PWM | I2C | I2C | Analog, PWM |
| Applications | Backlight | Backlight | Backlight | Backlight | Camera Flash | Camera Flash | Backlight |
| Operating Temperature | -20°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) |
| Package / Case | 10-VFDFN Exposed Pad | SOT-23-6 Thin, TSOT-23-6 | SOT-23-6 | SOT-23-6 | 10-VFDFN Exposed Pad, CSP | 9-WFBGA, DSBGA | 16-WQFN Exposed Pad |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Direct Package Equivalents (10-QFN Form Factor):
The ADP1650ACPZ-R7 (Analog Devices) shares the 10-VFDFN Exposed Pad package footprint with the MP3310NGQ-P. However, this part is optimized for camera flash applications with I2C dimming control and operates within a narrower supply range (2.7V to 5V). Circuit redesign is required if I2C control replaces PWM dimming. MSL rating of 3 (168 hours) requires moisture control during assembly compared to the MP3310NGQ-P's unlimited MSL rating.
Functional Equivalents (PWM Dimming, Backlight Optimized):
The AP3031KTR-G1 (Diodes Incorporated) provides the closest functional match with PWM dimming, 1.4A switch current, and 1MHz switching frequency in a TSOT-23-6 package. Supply voltage range is 2.7V to 16V, which covers the MP3310NGQ-P's minimum requirement but does not extend to 25V maximum. This part maintains unlimited MSL rating and is suitable for backlight applications.
The AP3019AKTR-G1 (Diodes Incorporated) operates in the same topology with PWM dimming but delivers only 550mA switch current, limiting its use to lower-power backlight circuits. Supply range of 2.5V to 16V and SOT-23-6 package provide design flexibility for space-constrained layouts.
The IS31BL3508A-STLS2-TR (Lumissil Microsystems) supports both analog and PWM dimming with 1.6A switch current and 1MHz frequency in SOT-23-6 package. Supply range is limited to 2.7V to 5.5V, restricting use in higher-voltage input applications. MSL rating of 3 requires moisture management.
Extended Topology Options:
The LT3517IUF#PBF (Analog Devices) offers buck-boost topology with 1.5A switch current, supporting supply ranges from 3V to 30V and operating temperatures to 125°C junction. This part provides the widest input voltage flexibility and highest temperature rating, with analog and PWM dimming in a 16-QFN package. Topology flexibility allows both step-up and step-down regulation in a single device.
Camera Flash Variants (Not Recommended for Direct Backlight Substitution):
The LM3642TLE/NOPB, LM3642TLE-LT/NOPB, and LM3642TLX/NOPB (Texas Instruments) are optimized for camera flash with I2C dimming, 1.5A flash current, and 4MHz switching frequency in 9-DSBGA package. These parts are not suitable for direct backlight replacement without circuit modification due to I2C control requirement and flash-specific current rating.
All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the MP3310NGQ-P.
Frequently Asked Questions (FAQ)
Q: Can the AP3031KTR-G1 directly replace the MP3310NGQ-P on the same PCB?
A: The AP3031KTR-G1 uses a TSOT-23-6 package while the MP3310NGQ-P uses 10-QFN (3x3). Direct PCB replacement is not possible without layout redesign. However, the electrical functionality is compatible for PWM-dimmed backlight applications within the 2.7V to 16V supply range. The 25V maximum supply of the MP3310NGQ-P cannot be utilized with the AP3031KTR-G1.
Q: What is the key difference between the MP3310NGQ-P and ADP1650ACPZ-R7?
A: Both parts share the 10-VFDFN package, but differ in application focus and control method. The MP3310NGQ-P uses PWM dimming for backlight applications with a 4.5V to 25V supply range. The ADP1650ACPZ-R7 uses I2C dimming for camera flash with a 2.7V to 5V supply range. Circuit redesign is required to switch between these control methods.
Q: Is the LT3517IUF#PBF suitable for the MP3310NGQ-P application?
A: The LT3517IUF#PBF supports both step-up and step-down topologies with 1.5A switch current and 3V to 30V supply range, making it functionally compatible for backlight applications. The 16-QFN package requires PCB layout changes. The extended supply range and buck-boost capability provide additional design flexibility beyond the MP3310NGQ-P's boost-only topology.
Q: Why are the LM3642 variants not recommended as direct substitutes?
A: The LM3642 family (LM3642TLE/NOPB, LM3642TLE-LT/NOPB, LM3642TLX/NOPB) is optimized for camera flash applications with I2C dimming control and 1.5A flash current rating. These parts operate within 2.5V to 5.5V supply range and use 9-DSBGA package. Direct substitution requires circuit redesign to implement I2C control instead of PWM dimming and is not recommended for backlight applications.
Q: What is the impact of MSL rating differences between substitute parts?
A: The MP3310NGQ-P has MSL 1 (unlimited moisture sensitivity), while several substitutes (AP3019AKTR-G1, IS31BL3508A-STLS2-TR, ADP1650ACPZ-R7) have MSL 3 (168 hours). MSL 3 parts require moisture control during storage and assembly. If the application environment or manufacturing process does not include moisture baking procedures, MSL 1 parts (AP3031KTR-G1, LM3642 variants, LT3517IUF#PBF) are preferred.
Q: Can the IS31BL3508A-STLS2-TR replace the MP3310NGQ-P in a 25V input application?
A: No. The IS31BL3508A-STLS2-TR maximum supply voltage is 5.5V, which is insufficient for the MP3310NGQ-P's 25V maximum input specification. This part is limited to lower-voltage backlight applications (2.7V to 5.5V input range).
Q: What are the package considerations when selecting a substitute?
A: The MP3310NGQ-P uses 10-QFN (3x3) package. Direct package equivalents include the ADP1650ACPZ-R7 (10-VFDFN). Alternative packages include SOT-23-6 (AP3031KTR-G1, AP3019AKTR-G1, IS31BL3508A-STLS2-TR), 9-DSBGA (LM3642 variants), and 16-QFN (LT3517IUF#PBF). Package selection affects PCB layout, thermal management, and assembly compatibility.
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