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MP3310NGQ-Z LED Driver IC Equivalent & Substitute Parts
Part Overview
The MP3310NGQ-Z is a PWM-dimmed LED driver IC manufactured by Monolithic Power Systems Inc., designed for backlight applications. It features a step-up (boost) topology with 1.3A switch current capability, operating from 4.5V to 25V input and delivering up to 50V output. The device is housed in a 10-QFN (3x3) package and maintains active product status with full ROHS3 compliance.
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter ranges for LED driver applications. Selection of alternatives may be necessary due to inventory availability, lead time considerations, or specific application requirements within the defined electrical envelope.
Substiute Parts
Key Parameters
| Parameter | MP3310NGQ-Z |
|---|---|
| Manufacturer | Monolithic Power Systems Inc. |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Step-Up (Boost) |
| Package / Case | 10-VFDFN Exposed Pad |
| 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) |
| Mounting Type | Surface Mount |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| MSL | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the MP3310NGQ-Z is determined by the following critical parameters:
Primary Substitution Criteria:
- Topology: Step-Up (Boost) configuration
- Dimming Method: PWM control
- Application Category: Backlight
- Internal Switch: Present
- Number of Outputs: Single output
- Surface Mount: Yes
Electrical Compatibility Range:
- Input voltage range must encompass or overlap with 4.5V–25V
- Output voltage capability must support 50V or higher
- Switch current must be sufficient for 1.3A or greater
- Operating frequency in the 1MHz range (±50% acceptable)
Mechanical Compatibility:
- Surface mount package with exposed pad
- Pin count and footprint compatibility with 10-pin QFN family
Parts meeting these criteria are classified as direct substitutes. Parts with different topologies (buck converters), different dimming methods (I2C, analog), or different applications (camera flash, lighting/signage) are listed for reference but represent functional alternatives rather than direct pin-compatible replacements.
Parameter Comparison
| Parameter | MP3310NGQ-Z | AP3032KTR-G1 | IS31BL3506B-STLS2-TR | LT3465AES6#TRPBF | LT3465ES6#TRMPBF |
|---|---|---|---|---|---|
| Manufacturer | MPS | Diodes Inc. | Lumissil | Analog Devices | Analog Devices |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) |
| Dimming | PWM | PWM | Analog, PWM | PWM | PWM |
| Applications | Backlight | Backlight | Backlight | Backlight | Backlight |
| Voltage - Supply (Min) | 4.5V | 2.7V | 2.7V | 2.7V | 2.7V |
| Voltage - Supply (Max) | 25V | 9V | 5.5V | 16V | 16V |
| Voltage - Output | 50V | — | — | 30V | 30V |
| Current - Output / Channel | 1.3A (Switch) | 1.4A (Switch) | 2.2A (Switch) | 225mA (Switch) | 225mA (Switch) |
| Frequency | 1MHz | 1MHz | 1MHz | 2.4MHz | 1.2MHz |
| Package / Case | 10-VFDFN Exposed Pad | SOT-23-6 | SOT-23-6 | SOT-23-6 Thin, TSOT-23-6 | SOT-23-6 Thin, TSOT-23-6 |
| 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) |
| Product Status | Active | Active | Not For New Designs | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Direct Substitutes (Topology & Application Match):
AP3032KTR-G1 and IS31BL3506B-STLS2-TR maintain step-up boost topology with PWM dimming for backlight applications. AP3032KTR-G1 is recommended for new designs due to active product status and lower MSL rating. IS31BL3506B-STLS2-TR carries "Not For New Designs" status and should be avoided for new development.
LT3465AES6#TRPBF and LT3465ES6#TRMPBF are functionally equivalent boost converters with PWM dimming. Both maintain active product status and ROHS3 compliance. These devices operate at higher switching frequencies (2.4MHz and 1.2MHz respectively) compared to the MP3310NGQ-Z baseline.
Functional Alternatives (Different Topology or Application):
ADP1649ACBZ-R7, ADP1653ACPZ-R7, and BD6164GUT-E2 employ I2C dimming control and are optimized for camera flash applications rather than backlight. These represent functional alternatives when I2C control is required.
AL3050FDC-7 is marked obsolete and should not be selected for new designs.
LED2000PUR uses step-down (buck) topology and is intended for lighting and signage applications, not backlight. This represents a different converter class.
LT3592EDDB#TRMPBF is a step-down (buck) converter and does not match the boost topology requirement.
Compliance & Certification:
All recommended active-status parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the MP3310NGQ-Z.
Frequently Asked Questions (FAQ)
Q: Can AP3032KTR-G1 replace MP3310NGQ-Z in a backlight application?
A: AP3032KTR-G1 shares step-up boost topology and PWM dimming for backlight applications. However, the maximum input voltage is 9V compared to 25V for the MP3310NGQ-Z. Substitution is valid only if your input voltage does not exceed 9V. Package footprints differ (SOT-23-6 vs. 10-VFDFN), requiring PCB layout modification.
Q: Why are ADP1649ACBZ-R7 and BD6164GUT-E2 listed if they use I2C dimming?
A: These parts are listed as functional alternatives because they maintain step-up boost topology and surface mount construction. However, they are optimized for camera flash applications with I2C control rather than PWM backlight dimming. Selection requires firmware or control circuit redesign.
Q: What is the significance of MSL rating differences?
A: MP3310NGQ-Z carries MSL 1 (unlimited moisture sensitivity), while AP3032KTR-G1 and IS31BL3506B-STLS2-TR carry MSL 3 (168 hours). MSL 3 devices require controlled storage and handling within 168 hours of package opening. For high-volume or long-lead applications, MSL 1 devices reduce moisture-related failure risk.
Q: Can LT3465AES6#TRPBF and LT3465ES6#TRMPBF be used interchangeably?
A: Both are LT3465 variants with identical electrical specifications for boost topology and PWM dimming. The primary difference is switching frequency (2.4MHz vs. 1.2MHz). They are electrically interchangeable; frequency selection depends on EMI and component size requirements in your application.
Q: Why is IS31BL3506B-STLS2-TR marked "Not For New Designs"?
A: This status indicates the manufacturer has discontinued active support and recommends alternative parts for new development. While functional, this part should not be selected for new designs due to potential future availability and support limitations.
Q: What package considerations apply when substituting with SOT-23-6 alternatives?
A: MP3310NGQ-Z uses 10-VFDFN (3x3) while AP3032KTR-G1, IS31BL3506B-STLS2-TR, and LT3465 variants use SOT-23-6. These are physically incompatible packages requiring PCB redesign. Verify thermal performance and current handling capability in your specific layout before substitution.
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