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Monolithic Power Systems Inc. MPM3551GQWE-AEC1-Z
- Part No.:
- MPM3551GQWE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 20-PowerLFQFN
- Datasheet:
-
MPM3551GQWE-AEC1-Z.pdf
- Description:
- 36V, 3A, SYNCHRONOUS STEP-DOWNMO
- Quantity:
- Payment:
- Shipping:
Inventory:3,166
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Product details
Overview
MPM3551GQWE-AEC1-Z from Monolithic Power Systems is a fully integrated, AEC-Q100 Grade 1 qualified synchronous step-down power module with built-in inductor and MOSFETs. It delivers up to 3A continuous output current, supports 3.3V–36V input range (42V load dump tolerant), operates from –40°C to +150°C junction temperature, and features 1μA shutdown current - enabling use in automotive infotainment, ADAS, and cluster systems with tight PCB space constraints.
For engineers reviewing the MPM3551GQWE-AEC1-Z datasheet, MPM3551GQWE-AEC1-Z pinout, MPM3551GQWE-AEC1-Z application, or MPM3551GQWE-AEC1-Z equivalent, key selection criteria include its integrated 1µH inductor, 2.2MHz fixed switching frequency with spread-spectrum modulation, CISPR25 Class 5 EMI compliance, low-dropout mode for cold-crank operation, and QFN-20 (4mm×6mm) wettable flank package.
Technical Context
The MPM3551GQWE-AEC1-Z implements a constant-on-time (COT) control architecture with frequency foldback and adaptive minimum on/off time (65ns/50ns) to maintain stability across wide VIN and load ranges. Its integrated 70mΩ high-side and 50mΩ low-side MOSFETs enable high efficiency at light loads via automatic frequency scaling and AAM (Auto-Audio Mode) operation.
Thermal management is enhanced by MeshConnect™ flip-chip packaging and symmetric VIN pinout, while functional safety support includes MPSafe™ QM system design documentation. The device enters LDO-mode during cold-crank (VIN ≥ 3.1V) and provides hiccup-mode over-current protection with 4.3–7.3A HS peak current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including 42V load dump transients per ISO16750. |
| Output Current | Up to 3A continuous - sustained without derating at TJ ≤ 125°C on standard 4-layer EVB. |
| Switching Frequency | 2.2MHz fixed with ±10% spread-spectrum modulation - enables compact external filtering and meets CISPR25 Class 5 radiated/conducted EMI limits. |
| Quiescent Current | 20μA typical in sleep mode, 1μA in shutdown - extends battery life in always-on automotive modules. |
| Feedback Reference | 0.8V ±1% - enables precise adjustable output down to 0.8V or fixed outputs from 1V to 5V. |
| Thermal Protection | 160°C thermal shutdown with 20°C hysteresis - ensures fault-tolerant operation under overload or poor airflow. |
| Package | QFN-20 (4mm × 6mm) with wettable flanks - supports automated optical inspection (AOI) and robust solder joint reliability. |
Pinout & Package
MPM3551GQWE-AEC1-Z uses a thermally enhanced QFN-20 (4mm × 6mm) package with wettable flanks and MeshConnect™ flip-chip construction for low θJC (6.1°C/W) and improved power dissipation. Pin functions are validated per MPS datasheet Rev. 1.0 (2023).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Open-drain power-good indicator | Asserts high when VOUT is within 94.5–105.5% of nominal; requires external pull-up for logic-level signaling. |
| 2 EN | Enable control input | Active-high with 1.02V rising threshold; no internal pull-up/pull-down - must be driven externally to avoid undefined state. |
| 3,14 VIN | Main input power supply | Dual pins internally connected; each requires local 10µF ceramic decoupling to minimize switching noise injection. |
| 5,12 PGND | Power ground return | Low-impedance path for high di/dt currents; must connect to large copper pour tied to input capacitor negative terminals. |
| 6,7,8,20 SW | Switch node | Internal connection to HS-FET source and LS-FET drain; directly interfaces with integrated 1µH inductor. |
| 9,10,11 OUT | Regulated output | Delivers filtered DC output; requires ≥22µF total ceramic output capacitance for ripple suppression and stability. |
| 15 VBOOT | Bootstrap supply | Provides gate drive voltage for HS-FET; requires 0.1µF ceramic capacitor between BOOT and SW pins. |
| 17 VCC | Bias regulator output | 5V internal LDO output powering control circuitry; requires ≥1µF decoupling capacitor placed adjacent to pin. |
| 18 AGND | Analog ground reference | Separate ground for FB and internal error amplifier; must be star-connected to PGND near IC to minimize noise coupling. |
| 19 FB | Feedback input | Senses output voltage divider ratio; connects directly to VOUT for fixed versions or mid-point of resistor divider for adjustable configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Inductor | 1µH ±20% with 36mΩ DCR - eliminates external inductor selection, reduces BOM count, and improves EMI performance via optimized magnetic shielding. |
| AEC-Q100 Grade 1 Qualification | Rated for –40°C to +150°C TJ operation - validated for automotive power rails including engine bay and ADAS sensor modules. |
| Low-Dropout (LDO) Mode | Operates with VIN as low as 3.1V while maintaining regulation - sustains critical loads during automotive cold-crank events without brownout. |
| CISPR25 Class 5 Compliance | Passes conducted/radiated emissions testing per ISO11452-2/4 with standard EMI filter - reduces need for additional shielding or filtering components. |
| Power Good Monitoring | PG output with 1.5% hysteresis and 70µs deglitch - provides reliable system-level power sequencing and fault detection for microcontrollers and FPGAs. |
Applications
| Automotive Infotainment | ADAS Camera Modules |
|---|---|
|
Use Scenario: Powering SoC, DDR memory, and display interface in head-unit systems with variable battery input and strict EMI requirements. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter supplying core logic and I/O rails; provides clean, regulated output with fast transient response. Use Value: Integrated inductor and spread-spectrum switching eliminate discrete filter components, reducing board area by >30% versus controller+external inductor solutions. |
Use Scenario: Supplying image sensor, ISP, and SerDes in rear-view or surround-view camera ECUs exposed to engine compartment temperatures. IC Role / Device Role / Timing Role: High-reliability 3.3V rail generator with cold-crank support and thermal shutdown - maintains operation during vehicle start-stop cycles. Use Value: 150°C max junction rating and AEC-Q100 qualification ensure uninterrupted video streaming under sustained 85°C ambient conditions. |
| Instrument Clusters | Automotive Telematics Control Units |
|
Use Scenario: Delivering stable 1.8V and 5V rails to MCU, TFT LCD driver, and CAN transceiver in digital dashboards with limited heatsinking. IC Role / Device Role / Timing Role: Dual-output capable (via multiple variants) step-down module providing isolated, low-noise power domains for analog and digital subsystems. Use Value: 20μA sleep current extends battery backup runtime during ignition-off periods; PG signal enables safe MCU wake-up sequencing. |
Use Scenario: Powering LTE/V2X modems, GNSS receivers, and secure boot processors in telematics units requiring long-term field reliability. IC Role / Device Role / Timing Role: Main 3.3V system rail with hiccup-mode OCP and load-dump tolerance - protects against battery line transients during jump-starts or alternator faults. Use Value: 42V load dump rating and 2.2MHz switching allow compact 1206-size input capacitors, reducing footprint vs. lower-frequency alternatives. |
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 |
|---|---|---|---|
| TPS6286418RTER | 3.3V fixed output only; 2.5MHz switching; no integrated inductor; requires external 0.47µH inductor; 2.5A max output. | Lacks AEC-Q100 qualification and load dump tolerance; not suitable for under-hood deployment. | Select when board space allows discrete inductor placement and automotive qualification is not required. |
| MAX20404ATPA/VY+ | 36V input, 3A, AEC-Q100 Grade 1; integrated inductor; but 1.2MHz switching and higher IQ (12μA shutdown). | Lower switching frequency increases EMI filter size; lacks spread-spectrum modulation and CISPR25 Class 5 certification. | Prefer for cost-sensitive designs where EMI margin is less constrained and thermal budget permits larger inductors. |
Compared with TPS6286418RTER and MAX20404ATPA/VY+, the MPM3551GQWE-AEC1-Z uniquely combines AEC-Q100 Grade 1, CISPR25 Class 5 compliance, 2.2MHz spread-spectrum operation, and 1μA shutdown current - making it optimal for space-constrained, high-EMI automotive domains where regulatory validation and ultra-low standby power are mandatory.
Availability
MPM3551GQWE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera systems, and instrument clusters requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPM3551GQWE-AEC1-Z 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, delivering simplified, high-reliability power solutions for harsh-environment applications such as ADAS, clusters, and telematics - emphasizing EMI robustness, thermal resilience, and functional safety readiness.
FAQ
What is the maximum allowable input voltage for continuous operation?
The MPM3551GQWE-AEC1-Z supports continuous operation up to 36V input. It withstands 42V transients per ISO16750-2 for automotive load dump events, but sustained operation above 36V may trigger over-voltage protection (VIN_OVP_RISING = 35.5–40V) and cause shutdown.
Does this module require an external feedback resistor divider for fixed-output versions?
No. For fixed-output variants like MPM3551GQWE-AEC1-Z (which ships with factory-trimmed 3.3V output), the FB pin must be connected directly to the OUT pin. External resistors are only needed for adjustable-output configurations using the base MPM3551GQWE part.
How is thermal performance affected by PCB layout?
Thermal resistance θJA is 46.2°C/W on a JESD51-7 4-layer board, but drops to 34.8°C/W on the official MPS evaluation board (EVM3551-QW-00A). Achieving low θJA requires ≥2 oz copper on inner layers, thermal vias under the exposed pad, and direct connection of PGND/VIN pins to solid ground/power planes.
Can the PG pin drive a microcontroller GPIO directly?
Yes, but only with an external pull-up resistor (typically 10kΩ to 3.3V or 5V). The PG pin is open-drain and sinks up to 1mA when asserted low. Do not leave it floating, and verify logic thresholds match your MCU's input high/low voltage specifications.
Is frequency synchronization supported?
No. The MPM3551GQWE-AEC1-Z uses a fixed 2.2MHz oscillator with spread-spectrum modulation and does not provide an external SYNC pin or PLL-based frequency locking capability. Synchronization requires selecting a different MPS part such as the MPQ4572 series.
What is the minimum output capacitance required for stability?
MPS specifies ≥22µF total ceramic output capacitance (e.g., two 10µF + one 2.2µF X7R 0805) placed close to the OUT and PGND pins. Lower values risk instability under transient load steps and may violate the 10mVpp ripple specification at 3A load.
Does the device support forced PWM mode?
No. The MPM3551GQWE-AEC1-Z operates in automatic mode only - transitioning between COT PWM and frequency-foldback PFM based on load. There is no pin or register to force continuous PWM; light-load efficiency relies on reduced switching frequency.
MPM3551GQWE-AEC1-Z 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-Z FAQ
1.How can I place an order for MPM3551GQWE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPM3551GQWE-AEC1-Z 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-Z reliable?
The price and inventory of MPM3551GQWE-AEC1-Z 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-Z is usually 5 days.
3.What payment methods are accepted for MPM3551GQWE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPM3551GQWE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPM3551GQWE-AEC1-Z?
MPM3551GQWE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPM3551GQWE-AEC1-Z 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-Z?
For technical support, including MPM3551GQWE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPM3551GQWE-AEC1-Z requirements.
6.How does Aetrix verify that MPM3551GQWE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPM3551GQWE-AEC1-Z 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-Z meets industry standards.
7.What is the process for return or replacement of MPM3551GQWE-AEC1-Z?
All MPM3551GQWE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPM3551GQWE-AEC1-Z, 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-Z part is unused and in its original packaging.
Return procedure for MPM3551GQWE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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