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Monolithic Power Systems Inc. MPQ4314GRE-33-AEC1-P
- Part No.:
- MPQ4314GRE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4314GRE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 4A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
MPQ4314GRE-33-AEC1-P from Monolithic Power Systems is a 45V, 4A 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 and ADAS power rails where cold-crank operation and low EMI are critical.
For engineers reviewing the MPQ4314GRE-33-AEC1-P datasheet, MPQ4314GRE-33-AEC1-P pinout, MPQ4314GRE-33-AEC1-P application, or MPQ4314GRE-33-AEC1-P equivalent, this device delivers verified 3.3V/4A regulation across 3.3–45V input, supports external synchronization and out-of-phase clock output, and integrates hiccup OCP, thermal shutdown, and low-dropout mode for automotive battery transients.
Technical Context
The MPQ4314GRE-33-AEC1-P implements current-mode control with programmable switching frequency (350–1000 kHz) and selectable Advanced Asynchronous Modulation (AAM) or Forced Continuous Conduction Mode (FCCM). Its internal HS/LS FETs enable high efficiency across load range, while frequency foldback prevents inductor current runaway during startup.
It features symmetric VIN routing for low EMI, open-drain power-good (PG) with ±5% window, 100ns minimum on-time, and dedicated soft-start (SS) pin sourcing 13μA to control inrush. The device operates from –40°C to +150°C junction temperature and includes AEC-Q100 Grade 1 qualification for automotive reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - accommodates full automotive battery range including cold-crank (down to 3.3V) and load-dump transients. |
| Output Voltage | Fixed 3.3V ±2% - factory-trimmed for precision rail without external feedback resistors. |
| Continuous Output Current | 4A - sustained delivery with integrated 48mΩ HS-FET and 20mΩ LS-FET enabling >90% efficiency at 2A–4A loads. |
| Shutdown Quiescent Current | 1.7μA - enables ultra-low-power battery backup operation in always-on automotive modules. |
| Switching Frequency Range | 350kHz to 1000kHz - configurable via resistor on FREQ pin or synchronizable to external clock for EMI reduction. |
| Power Good Threshold | ±5% (95–105% of nominal) - open-drain PG signal asserts only when VOUT is within tight regulation window. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C ambient) - qualified for under-hood and instrument cluster applications. |
Pinout & Package
MPQ4314GRE-33-AEC1-P is housed in a wettable flank QFN-20 (4mm × 4mm) package with exposed thermal pad, optimized for automotive reflow inspection and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced CCM; pull low for light-load AAM - directly controls efficiency vs. noise trade-off. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal to lock fSW and reduce beat frequencies in multi-rail systems. |
| 3,12 VIN | Main input supply | Primary power path for control circuitry and power stage; requires local ceramic decoupling. |
| 4,5,10,11 PGND | Power ground return | Low-impedance return for high di/dt switch node current; must be connected to thermal pad. |
| 6 BST | Bootstrap supply | Drives HS-FET gate; requires ceramic capacitor between BST and SW to sustain gate voltage. |
| 7,8 SW | Switch node | Connection point between HS/LS FETs and external inductor; high dv/dt node requiring careful layout. |
| 9 EN | Enable control | Active-high logic input; 0.85V threshold ensures robust start-up under weak-battery conditions. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase clock output for interleaving adjacent converters and reducing input ripple. |
| 14 PG | Power-good indicator | Open-drain output requiring external pull-up; signals valid regulation with 35μs delay. |
| 15 NC | No connect | Internally unconnected; must remain floating per datasheet. |
| 16 VCC | Bias supply | Internal LDO output (4.9V typical); powers gate drivers and analog circuitry; needs local decoupling. |
| 17 AGND | Analog ground | Reference for FB, SS, and MODE pins; must be separated from PGND and tied at single point. |
| 18 FB | Feedback input | Not used in -33 variant - internally connected to 0.815V reference for fixed 3.3V output. |
| 19 SS | Soft-start timing | Capacitor-to-ground sets ramp time; 13μA current source limits inrush current during power-up. |
| 20 FREQ | Frequency configuration | Resistor-to-ground sets fSW; e.g., 62kΩ yields 470kHz for optimal EMI/efficiency balance. |
Key Features
| Feature | Design Value |
|---|---|
| Frequency Spread Spectrum (FSS) | Reduces peak radiated/conducted EMI by spreading energy across 200kHz bandwidth - validated to CISPR25 Class 5. |
| Low-Dropout Mode | Enables regulation down to VIN = VOUT + 0.3V during cold-crank, sustaining 3.3V output even at 3.6V input. |
| Hiccup Over-Current Protection | Shuts down on sustained overload, then auto-retries - prevents thermal runaway during short-circuit events. |
| Wettable Flank QFN | Facilitates automated optical inspection (AOI) of solder joints in automotive PCB assembly lines. |
| Thermal Shutdown with Hysteresis | Triggers at 170°C with 20°C hysteresis - ensures safe recovery without oscillation after fault clearance. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head units operating across 6–16V battery range with cold-crank dips to 3.3V. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering 4A continuous current with hiccup OCP and thermal protection. Use Value: Maintains stable 3.3V rail during engine start (cold crank) and meets CISPR25 Class 5 EMI limits without added filtering. |
Use Scenario: Supplies image sensor, ISP, and SerDes in rear-view or surround-view camera modules mounted near engine bay. IC Role / Device Role / Timing Role: High-reliability 3.3V DC/DC converter with AEC-Q100 Grade 1 qualification and –40°C to +125°C operation. Use Value: Wettable flank package enables AOI verification; low IQ extends battery runtime in parking-mode vision systems. |
| Digital Instrument Cluster | Automotive Telematics Control Unit (TCU) |
|
Use Scenario: Generates 3.3V for microcontroller, TFT LCD driver, and CAN transceiver in digital dashboards with high ambient temperature exposure. IC Role / Device Role / Timing Role: Synchronous buck converter with integrated FETs and low-dropout mode for uninterrupted operation during cranking. Use Value: Thermal shutdown and frequency foldback prevent latch-up during transient overloads; PG signal enables system-level health monitoring. |
Use Scenario: Powers LTE/V2X modem, GNSS receiver, and MCU in cellular-connected TCU modules requiring long-term field reliability. IC Role / Device Role / Timing Role: Fixed-output 3.3V regulator with external sync capability to coordinate switching with other power rails and minimize beat noise. Use Value: SYNCO pin enables interleaved operation with companion converters; FSS reduces conducted emissions into sensitive RF front-end. |
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 |
|---|---|---|---|
| MPQ4314GRE-AEC1-P | Adjustable output (0.815V reference); requires external FB divider; same package and specs otherwise. | Used where multiple output voltages are needed from one platform design. | Select when flexibility in output voltage is required; adds two resistors but retains all other features. |
| MPQ4315GRE-33-AEC1-P | 5A rated output; identical pinout, package, and feature set; higher RON_HS (42mΩ) and RON_LS (18mΩ). | Preferred for future-proofing or higher-current derivatives (e.g., clusters with brighter displays). | Choose for margin headroom or upcoming 5A designs; compatible drop-in replacement with minor efficiency trade-off at light load. |
Compared with MPQ4314GRE-33-AEC1-P, the adjustable MPQ4314GRE-AEC1-P offers voltage flexibility at the cost of BOM count, while MPQ4315GRE-33-AEC1-P provides 25% higher current capacity with nearly identical footprint and thermal behavior-enabling scalable platform power design.
Availability
MPQ4314GRE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply with AEC-Q100 compliance and extended temperature support.
Supply support for MPQ4314GRE-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 MPQ4314 family targets automotive power systems, designed specifically to meet stringent AEC-Q100 requirements, cold-crank resilience, and CISPR25 EMI standards for safety-critical vehicle subsystems.
FAQ
What is the purpose of the MODE pin on MPQ4314GRE-33-AEC1-P?
The MODE pin selects between Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM). Pulling it low enables AAM for higher light-load efficiency; pulling it high forces FCCM for lower output ripple and predictable switching frequency - critical for EMI-sensitive automotive applications.
Does MPQ4314GRE-33-AEC1-P require external feedback resistors?
No. The "-33" suffix denotes a factory-trimmed fixed 3.3V output version. The FB pin is internally connected to the 0.815V reference, eliminating external resistors and reducing BOM count and layout sensitivity - ideal for high-volume automotive production.
How does the wettable flank QFN package benefit automotive manufacturing?
The wettable flank structure allows automated optical inspection (AOI) of solder fillets on all four side walls, enabling 100% solder joint verification in automotive PCB assembly - a key requirement for zero-defect quality standards like IATF 16949.
Can MPQ4314GRE-33-AEC1-P synchronize to an external clock?
Yes. The SYNCIN pin accepts a 350–1000kHz external clock signal, allowing precise frequency alignment with other converters in multi-rail systems. This eliminates beat frequencies and simplifies EMI filter design - confirmed in CISPR25 Class 5 testing with synchronized operation.
What protection features are integrated into MPQ4314GRE-33-AEC1-P?
It integrates hiccup-mode over-current protection, thermal shutdown (170°C trip, 20°C hysteresis), input UVLO (2.8V rising), power-good monitoring, and frequency foldback during startup - all verified per AEC-Q100 stress test conditions for automotive reliability.
Is the PG (power good) signal active-high or open-drain?
The PG pin is open-drain with no internal pull-up. It requires an external pull-up resistor to a valid supply (e.g., VIN or VCC). PG asserts high when VOUT is within 95–105% of 3.3V and goes low for deviations beyond ±6.5%, with 35μs response delay in both directions.
How is low EMI achieved in MPQ4314GRE-33-AEC1-P?
EMI reduction is achieved through three co-designed features: Frequency Spread Spectrum (FSS) modulation, symmetric VIN routing to cancel common-mode noise, and out-of-phase SYNCO output for interleaving - collectively enabling CISPR25 Class 5 compliance without additional ferrite beads or shielding.
MPQ4314GRE-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 4A
- Frequency - Switching:
- 350kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x4)
MPQ4314GRE-33-AEC1-P FAQ
1.How can I place an order for MPQ4314GRE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4314GRE-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 MPQ4314GRE-33-AEC1-P reliable?
The price and inventory of MPQ4314GRE-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 MPQ4314GRE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4314GRE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4314GRE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4314GRE-33-AEC1-P?
MPQ4314GRE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4314GRE-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 MPQ4314GRE-33-AEC1-P?
For technical support, including MPQ4314GRE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4314GRE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ4314GRE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4314GRE-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 MPQ4314GRE-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4314GRE-33-AEC1-P?
All MPQ4314GRE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4314GRE-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 MPQ4314GRE-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4314GRE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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