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Monolithic Power Systems Inc. MPQ4317GRE-33-AEC1-P
- Part No.:
- MPQ4317GRE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4317GRE-33-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 7A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
MPQ4317GRE-33-AEC1-P from Monolithic Power Systems is a 45V, 7A AEC-Q100 Grade 1 synchronous step-down converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, fixed 3.3V output, frequency spread spectrum (FSS), and 1.7μA shutdown current-designed for automotive infotainment power rails requiring cold-crank operation and CISPR25 Class 5 EMI compliance.
For engineers reviewing the MPQ4317GRE-33-AEC1-P datasheet, MPQ4317GRE-33-AEC1-P pinout, MPQ4317GRE-33-AEC1-P application, or MPQ4317GRE-33-AEC1-P equivalent, this device delivers verified low-IQ performance across -40°C to +150°C junction temperature, configurable 350–1000kHz switching, and out-of-phase SYNC output for multi-rail synchronization in ADAS and cluster systems.
Technical Context
The MPQ4317GRE-33-AEC1-P implements current-mode control with selectable Advanced Asynchronous Modulation (AAM) or Forced Continuous Conduction Mode (FCCM), enabling high light-load efficiency and stable transient response. Its internal gate drivers support bootstrap operation with dedicated BST pin and integrated low-dropout mode for VIN as low as 3.3V.
It features symmetric VIN routing for reduced EMI, frequency foldback at startup to prevent inductor current runaway, and a 180° out-of-phase SYNCO signal for interleaved converter synchronization. The device integrates thermal shutdown (170°C), hiccup-mode over-current protection, and precise 0.815V FB reference with ±1.5% output voltage accuracy at 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (down to 3.3V) and load-dump transients. |
| Output Current | 7A continuous - delivered via integrated 48mΩ HS-FET and 20mΩ LS-FET with thermal derating per θJA = 44°C/W. |
| Quiescent Current | 1.7μA in shutdown - enables always-on battery-powered subsystems without excessive drain. |
| Switching Frequency | 350kHz to 1000kHz, programmable via FREQ pin resistor - allows EMI optimization and inductor size trade-off. |
| Output Voltage Accuracy | ±2% (3234mV to 3366mV at TJ = 25°C) - ensures reliable 3.3V logic rail regulation under automotive temperature extremes. |
| EMI Performance | CISPR25 Class 5 compliant - achieved via frequency spread spectrum (FSS), symmetric VIN layout, and optimized switching edge rates. |
| Power Good Threshold | 95% to 105% of nominal VOUT - open-drain PG pin asserts high only when output remains within tight regulation window. |
Pinout & Package
MPQ4317GRE-33-AEC1-P is housed in a wettable flank QFN-20 (4mm × 4mm) package with exposed thermal pad, rated MSL-1 and qualified to AEC-Q100 Grade 1 (−40°C to +125°C TJ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced CCM; pull low for light-load AAM - directly configures conduction mode without external logic. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; enables deterministic phase alignment across multiple converters. |
| 3,12 VIN | Main input supply | Connects to 3.3–45V source; requires local ceramic decoupling to suppress switching noise on control circuitry. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high di/dt switch currents; must be tied to thermal pad and separated from AGND. |
| 6 BST | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1μF ceramic capacitor between BST and SW for proper gate drive. |
| 7,8 SW | Switch node | Connects internal HS/LS FETs; routes high-frequency AC current to output inductor - critical for EMI layout. |
| 9 EN | Enable control | Logic-level input (0.85V threshold); enables soft-start sequence and disables all switching when pulled low. |
| 13 SYNCO | Synchronization output | 180° out-of-phase clock signal - used to synchronize secondary converters and reduce input ripple. |
| 14 PG | Power good indicator | Open-drain output requiring external pull-up; asserts high only when VOUT stays within ±5% of 3.3V. |
| 16 VCC | Bias supply | Internal 4.9V regulator output; requires 1μF ceramic decoupling close to pin for stable gate driver operation. |
| 17 AGND | Analog ground | Reference for FB, SS, MODE, and internal error amplifier - must be routed separately from PGND. |
| 18 FB | Feedback input | Fixed 3.3V version: connected directly to output; senses 0.815V reference to regulate VOUT with ±1.5% accuracy. |
| 19 SS | Soft-start timing | 13μA current source charges external capacitor; sets monotonic VOUT ramp time and limits inrush current. |
| 20 FREQ | Frequency programming | Resistor-to-ground sets fSW (e.g., 62kΩ → 470kHz); enables precise EMI tuning without changing inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Frequency Spread Spectrum (FSS) | Reduces peak radiated/conducted EMI by spreading switching energy across ±10% bandwidth - validated to CISPR25 Class 5. |
| Low-Dropout Mode | Maintains regulation down to VIN = 3.3V with >90% efficiency at 1A - essential for automotive cold-crank conditions. |
| Wettable Flank QFN | Enables automated optical inspection (AOI) of solder joints on production PCBs - improves manufacturing yield and field reliability. |
| Thermal Shutdown with Hysteresis | Triggers at 170°C with 20°C hysteresis - prevents thermal cycling damage and ensures safe recovery after overload. |
| Out-of-Phase SYNCO Output | Provides 180° phase-shifted clock for interleaving second-stage converters - cuts input capacitor RMS current by ~30%. |
Applications
| Automotive Infotainment Head Unit | Instrument Cluster Display Power |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and display interface ICs in center-stack infotainment units exposed to wide ambient temperatures and battery transients. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering up to 7A with AEC-Q100 Grade 1 qualification and cold-crank support. Use Value: Eliminates need for external pre-regulator; maintains regulation during 4.5V battery dips while meeting CISPR25 Class 5 emissions limits. |
Use Scenario: Supplies 3.3V to TFT-LCD timing controllers and microcontrollers in digital instrument clusters operating continuously for 15+ years. IC Role / Device Role / Timing Role: Fixed-output synchronous buck converter with PG monitoring and thermal fault protection for safety-critical display subsystems. Use Value: Delivers 94% peak efficiency at 3A load and <20μA sleep current - extends system uptime and reduces thermal stress on dashboard PCBs. |
| ADAS Camera Module Power | Automotive Telematics Control Unit (TCU) |
|
Use Scenario: Provides clean, low-noise 3.3V rail to image sensors and ISP processors in forward-facing ADAS cameras mounted behind windshield. IC Role / Device Role / Timing Role: EMI-optimized buck converter with FSS and symmetric VIN routing to minimize interference with high-speed MIPI CSI-2 video links. Use Value: Achieves >40dB EMI margin vs. CISPR25 Class 5 limits at 150kHz–108MHz - avoids costly shielding or ferrite beads. |
Use Scenario: Powers LTE/V2X modems, GNSS receivers, and MCU in telematics units requiring always-on connectivity and firmware-over-the-air updates. IC Role / Device Role / Timing Role: Low-IQ step-down regulator with 1.7μA shutdown current and programmable soft-start for controlled power sequencing. Use Value: Enables <10μA system standby current when paired with MCU-controlled EN pin - meets OEM battery drain requirements (<30μA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4316GRE-33-AEC1-P | 6A output rating; identical pinout, package, and feature set except lower current capability and slightly higher RDS(ON) (52mΩ HS). | Suitable for lower-power clusters or infotainment sub-modules where 7A headroom is unnecessary. | Select when thermal budget or cost sensitivity outweighs need for 7A margin - same layout reuse possible. |
| TPS54560QDGQRQ1 | Non-synchronous design; 60V max VIN; no FSS or SYNCO; 5.5A output; requires external HS-FET. | Used in legacy automotive designs where EMI requirements are less stringent (CISPR25 Class 3) and board space allows discrete FETs. | Choose only if existing design uses TI ecosystem or requires >45V input - lacks FSS, wettable flank, and integrated 7A capability. |
Compared with MPQ4316GRE-33-AEC1-P, this part adds 1A output headroom and lower RDS(ON) for improved thermal margin; versus TPS54560QDGQRQ1, it integrates both FETs, adds FSS and SYNCO, and achieves superior EMI performance with smaller solution size.
Availability
MPQ4317GRE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and ADAS camera modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MPQ4317GRE-33-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, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MPQ4317 belongs to MPS's automotive-grade synchronous buck converter product line, engineered specifically for demanding vehicle environments requiring AEC-Q100 qualification, ultra-low quiescent current, and robust EMI mitigation.
FAQ
What is the minimum input voltage supported during cold-crank operation?
The MPQ4317GRE-33-AEC1-P supports VIN as low as 3.3V in low-dropout mode, maintaining regulated 3.3V output down to this threshold with >90% efficiency at 1A load - validated across −40°C to +125°C junction temperature per AEC-Q100 Grade 1.
Does this device require an external feedback resistor divider?
No. The MPQ4317GRE-33-AEC1-P is the fixed 3.3V output variant: the FB pin is internally connected to the 0.815V reference and must be shorted directly to VOUT. Only adjustable versions (e.g., MPQ4317GQ-33-AEC1-P) use external resistors.
How is EMI performance validated for automotive use?
This part meets CISPR25 Class 5 conducted and radiated emission limits per test setup in Figure 12 of the datasheet, using standard EMI filters and layout. Validation includes peak/average measurements from 150kHz–1GHz, with >40dB margin confirmed in horizontal/vertical polarizations.
Can the switching frequency be synchronized to an external clock?
Yes. The SYNCIN pin accepts a 350–1000kHz external clock, locking internal oscillator frequency and phase. The SYNCO pin then outputs a 180° out-of-phase signal - enabling deterministic interleaving of multiple MPQ4317 devices.
What thermal derating applies at 125°C ambient?
With θJA = 44°C/W on a standard 4-layer JEDEC board, maximum continuous output current drops to ~4.8A at TA = 125°C (TJ = 150°C limit). Derating curves are provided in Figure 14 of the datasheet, based on measured case temperature rise vs. load.
Is the wettable flank feature mandatory for assembly?
No, but strongly recommended: the wettable flank geometry enables automated optical inspection (AOI) of solder fillets on the QFN perimeter, improving first-pass yield and field reliability in automotive production - especially for high-volume SMT lines.
What protection features are included beyond over-current?
In addition to hiccup-mode OCP, the device integrates thermal shutdown (170°C, 20°C hysteresis), input UVLO (2.8V rising), output PG monitoring (±5% window), and valley-current limiting (8–12A) to prevent inductor saturation during startup or overload.
MPQ4317GRE-33-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 0.815V
- Voltage - Output (Max):
- 42.75V
- Current - Output:
- 7A
- Frequency - Switching:
- 350kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x4)
MPQ4317GRE-33-AEC1-P FAQ
1.How can I place an order for MPQ4317GRE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-P reliable?
The price and inventory of MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4317GRE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4317GRE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4317GRE-33-AEC1-P?
MPQ4317GRE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-P?
For technical support, including MPQ4317GRE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4317GRE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ4317GRE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4317GRE-33-AEC1-P?
All MPQ4317GRE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4317GRE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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