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Monolithic Power Systems Inc. MPM3551GQWE-AEC1-P
- Part No.:
- MPM3551GQWE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 20-PowerLFQFN
- Datasheet:
-
MPM3551GQWE-AEC1-P.pdf
- Description:
- 36V, 3A, SYNCHRONOUS STEP-DOWNMO
- Quantity:
- Payment:
- Shipping:
Inventory:3,032
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Product details
Overview
MPM3551GQWE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fully integrated synchronous step-down power module with embedded inductor and MOSFETs, delivering up to 3A continuous output current across a 3.3V–36V input range, featuring 1μA shutdown quiescent current, 2.2MHz fixed switching frequency, and 42V load dump tolerance for automotive power rail regulation.
For engineers reviewing the MPM3551GQWE-AEC1-P datasheet, MPM3551GQWE-AEC1-P pinout, MPM3551GQWE-AEC1-P application, or MPM3551GQWE-AEC1-P equivalent, this page provides verified functional specifications, thermal performance data, CISPR25 Class 5 EMI compliance details, cold-crank behavior, and validated alternative options for automotive infotainment, ADAS, and cluster power design.
Technical Context
The MPM3551GQWE-AEC1-P implements a constant-on-time (COT) control architecture with frequency foldback and adaptive minimum on/off time (65ns/50ns) to maintain stability under wide VIN and load transients. Its integrated 70mΩ HS-FET and 50mΩ LS-FET enable high efficiency across 0.8V–5V adjustable/fixed outputs while supporting LDO-mode operation down to 3.1V VIN for cold-crank conditions.
EMI mitigation includes spread-spectrum modulation (±10% fSW), symmetric VIN pinout, MeshConnect™ flip-chip packaging, and integrated 1µH inductor with 36mΩ DCR - all validated to CISPR25 Class 5 radiated/conducted emissions limits using standard evaluation board layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including 42V load dump survival without external clamping. |
| Output Current | Up to 3A continuous - sustained at TJ ≤ 150°C with θJA = 34.8°C/W on 4-layer EVB. |
| Quiescent Current | 1μA in shutdown, 20μA in sleep mode - enables >10-year battery standby in always-on vehicle modules. |
| Switching Frequency | 2.2MHz fixed (±10% spread spectrum) - allows compact 1µH inductor and avoids AM radio band interference. |
| Power Good Threshold | 94.5%–105.5% VOUT window with 70µs deglitch - ensures reliable system reset sequencing in safety-critical clusters. |
| Thermal Protection | 160°C–185°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Package | QFN-20 (4mm × 6mm) with wettable flanks - supports automated optical inspection (AOI) and high-reliability solder joint formation. |
Pinout & Package
MPM3551GQWE-AEC1-P uses a QFN-20 (4mm × 6mm) package with wettable flanks and exposed thermal pad. Pin 1 is marked by a dot; top view orientation follows JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Open-drain power good indicator | Signals VOUT within ±5.5% of nominal; requires external pull-up for MCU reset assertion. |
| 2 EN | Enable control input | Logic-high threshold 1.02V; no internal pull-up - must be actively driven to avoid undefined startup state. |
| 3,14 VIN | Main input power supply | Dual pins reduce trace inductance; each requires local 10µF ceramic decoupling to PGND. |
| 5,12 PGND | Power ground return | Low-impedance path for high di/dt switch currents; connects directly to input capacitor negative terminal. |
| 6,7,8,20 SW | Switch node | Internal connection point between HS-FET source and LS-FET drain; ties to integrated inductor. |
| 9,10,11 OUT | Regulated output | Delivers filtered DC; requires ≥22µF low-ESR ceramic output capacitance per datasheet layout guidelines. |
| 15 VBOOT | Bootstrap supply | Charged via external 0.1µF capacitor to SW; enables HS-FET gate drive above VIN during high-duty cycles. |
| 17 VCC | Bias regulator output | 5V internal supply for control circuitry; requires ≥1µF ceramic bypass to AGND. |
| 18 AGND | Analog ground reference | Separate ground for FB feedback network to minimize noise coupling into voltage regulation loop. |
| 19 FB | Feedback input | Monitors output via resistor divider (adjustable) or direct connection (fixed-output variants). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power stage | 70mΩ HS-FET + 50mΩ LS-FET + 1µH inductor in single QFN package - eliminates external magnetics and reduces BOM count by 12+ components. |
| AEC-Q100 Grade 1 qualification | -40°C to +150°C junction operation with full characterization - certified for engine bay and under-hood deployment. |
| Cold-crank support | LDO-mode operation down to 3.1V VIN with >90% efficiency at 1A - maintains head-unit power during cranking dips. |
| CISPR25 Class 5 compliance | Passes peak/average conducted & radiated emissions tests (150kHz–1GHz) with standard filter - reduces EMC debug time by ≥3 weeks. |
| Frequency foldback | Reduces fSW under light load to minimize gate charge loss - extends battery life in key-off monitoring states. |
Applications
| Automotive Infotainment | Instrument Clusters |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head units with variable load profiles and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter supplying core logic rails with fast transient response (<10µs recovery). Use Value: Integrated inductor eliminates discrete magnetics placement error; 2.2MHz switching enables <10mm² solution size for space-constrained dashboards. |
Use Scenario: Regulating microcontroller, TFT backlight, and CAN transceiver supplies in digital instrument panels. IC Role / Device Role / Timing Role: Dual-rail power source (e.g., 3.3V for MCU, 5V for display) with independent PG signaling per rail. Use Value: 42V load dump tolerance removes need for external TVS; wettable flanks ensure AOI-compatible solder joints for zero-defect manufacturing. |
| ADAS Camera Modules | Automotive Telematics |
|
Use Scenario: Providing clean, low-noise 1.8V/1.2V rails for image sensors and ISP processors in surround-view cameras. IC Role / Device Role / Timing Role: Secondary buck stage following front-end 12V-to-5V conversion, optimized for low ripple and thermal resilience. Use Value: 20μA sleep-mode IQ enables always-on vision processing during parking; -40°C to +150°C rating supports hood-mounted camera mounting. |
Use Scenario: Powering LTE/C-V2X modems, GNSS receivers, and secure boot MCUs in telematics control units (TCUs). IC Role / Device Role / Timing Role: High-reliability point-of-load regulator with fault reporting (PG) and overcurrent hiccup protection. Use Value: Thermal shutdown + OCP hiccup mode prevents field failures during antenna surge events; AEC-Q100 documentation supports ISO 26262 ASIL-B integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6286418RQNR | 2.5V–6V input, 1.8V fixed output, 4A rating, 3.4MHz fSW, no integrated inductor | Requires external 0.47µH inductor; suited for low-VIN, high-current applications where board space permits discrete magnetics | Select when input is stabilized 5V rail and higher switching frequency is acceptable for smaller capacitors. |
| MAX20404ATPA/VY+ | 3.5V–36V input, 3A, 2.1MHz fSW, integrated inductor, but only AEC-Q200 rated (not Q100) | Lacks full AEC-Q100 Grade 1 qualification; limited to non-safety-critical cabin applications | Choose only for cost-sensitive non-ASIL systems where qualification depth is not mandated. |
Compared with TPS6286418RQNR and MAX20404ATPA/VY+, the MPM3551GQWE-AEC1-P uniquely combines AEC-Q100 Grade 1, 42V load dump tolerance, and full integration - making it the only drop-in solution for ASIL-B-compliant ADAS and cluster designs requiring zero external magnetics.
Availability
MPM3551GQWE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and ADAS camera power systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for MPM3551GQWE-AEC1-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs and modules, with design centers in the US, China, and Taiwan.
The MPM3551 product line targets automotive-grade DC-DC conversion with integrated magnetics, emphasizing AEC-Q100 compliance, EMI robustness, and cold-crank resilience for next-generation vehicle electronics.
FAQ
What is the maximum allowable input voltage for continuous operation?
The MPM3551GQWE-AEC1-P supports continuous operation up to 36V input. It withstands 42V automotive load dump transients per ISO 16750-2, but sustained operation above 36V may trigger overvoltage protection and shutdown.
Does this part require an external feedback resistor divider?
No - the MPM3551GQWE-AEC1-P is a fixed-output variant (3.3V). The FB pin is internally connected to the output; external resistors are unnecessary. Adjustable versions (e.g., MPM3551GQW) require a two-resistor divider.
How is thermal performance validated on the production board?
Thermal rise is characterized on the MPS EVM3551-QW-00A evaluation board (8.3cm × 8.3cm, 4-layer, 2oz copper), measuring 30°C case rise at 3A/12VIN/5VOUT - confirming safe operation within AEC-Q100 Grade 1 limits.
Can the PG signal drive a microcontroller GPIO directly?
Yes - the open-drain PG pin sinks up to 1mA and pulls low below 0.3V when VOUT is out-of-regulation. A 10kΩ pull-up to 3.3V or 5V is sufficient for direct MCU interface without level-shifting.
Is the integrated inductor shielded against magnetic coupling?
Yes - the molded 1µH inductor features magnetic shielding that limits radiated coupling to adjacent traces. Measured near-field emissions show >20dB reduction versus unshielded wirewound alternatives at 2.2MHz.
What is the minimum output capacitance required for stability?
The datasheet specifies ≥22µF total ceramic output capacitance (e.g., two 10µF + one 2.2µF X7R) with ≤5mΩ ESR. Using less capacitance risks instability under load transients and violates CISPR25 EMI test conditions.
Does the part support forced PWM mode to eliminate frequency variation?
No - the MPM3551GQWE-AEC1-P uses adaptive COT control with frequency foldback and spread-spectrum modulation. Forced PWM is not supported; light-load efficiency is maintained via reduced switching frequency instead.
MPM3551GQWE-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPM
- Package/Case:
- 20-PowerLFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output 1:
- 0.8 ~ 5V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 3A
- Power (Watts):
- 15 W
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Adjustable Output
- Operating Temperature:
- -40°C ~ 150°C (With Derating)
- Efficiency:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x6)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MPM3551GQWE-AEC1-P FAQ
1.How can I place an order for MPM3551GQWE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3551GQWE-AEC1-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPM3551GQWE-AEC1-P reliable?
The price and inventory of MPM3551GQWE-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPM3551GQWE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPM3551GQWE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3551GQWE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3551GQWE-AEC1-P?
MPM3551GQWE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3551GQWE-AEC1-P order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPM3551GQWE-AEC1-P?
For technical support, including MPM3551GQWE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3551GQWE-AEC1-P requirements.
6.How does Aetrix verify that MPM3551GQWE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPM3551GQWE-AEC1-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPM3551GQWE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPM3551GQWE-AEC1-P?
All MPM3551GQWE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPM3551GQWE-AEC1-P, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPM3551GQWE-AEC1-P part is unused and in its original packaging.
Return procedure for MPM3551GQWE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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