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Monolithic Power Systems Inc. MPQ4317GRE-33-AEC1-Z
- Part No.:
- MPQ4317GRE-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4317GRE-33-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 7A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,985
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Product details
Overview
MPQ4317GRE-33-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter delivering 7A continuous output current with fixed 3.3V output, 3.3V–45V input range, 1.7μA shutdown quiescent current, and frequency spread spectrum (FSS) for low EMI-designed for automotive infotainment power rails.
For engineers reviewing the MPQ4317GRE-33-AEC1-Z datasheet, MPQ4317GRE-33-AEC1-Z pinout, MPQ4317GRE-33-AEC1-Z application, or MPQ4317GRE-33-AEC1-Z equivalent, key selection criteria include cold-crank low-dropout mode, AAM/FCCM modulation control, ±3% output voltage accuracy at 3.3V, QFN-20 wettable flank package, and CISPR25 Class 5 radiated/EMI compliance in automotive layouts.
Technical Context
The MPQ4317 implements current-mode control with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, enabling fast transient response and stable regulation across wide load and input conditions. Its configurable 350kHz–1000kHz switching frequency supports synchronization to external clocks and out-of-phase SYNCO output for multi-rail phase interleaving.
It features dual operating modes: Advanced Asynchronous Modulation (AAM) for ultra-low IQ at light loads (18μA sleep current), and Forced Continuous Conduction Mode (FCCM) for predictable ripple and noise control. Frequency foldback and thermal shutdown (170°C) ensure robust start-up and fault tolerance under automotive stress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (4.5V) and load-dump (42V) transients. |
| Output Voltage | Fixed 3.3V ±3% - eliminates external feedback resistors; optimized for MCU, FPGA, and sensor rail requirements. |
| Continuous Output Current | 7A - delivered with internal MOSFETs; validated up to +150°C junction temperature per AEC-Q100 Grade 1. |
| Quiescent Current | 1.7μA in shutdown, 18μA in sleep mode - enables always-on systems with minimal battery drain. |
| Switching Frequency | Configurable 350kHz–1000kHz via FREQ pin resistor - allows EMI optimization and avoids AM band interference. |
| EMI Performance | CISPR25 Class 5 compliant (peak/average conducted & radiated) - achieved with FSS, symmetric VIN routing, and optimized layout guidance. |
| Protection Features | OCP with hiccup mode, thermal shutdown (170°C), UVLO (3.0V rising), PG open-drain flag - ensures fail-safe operation in harsh environments. |
Pinout & Package
MPQ4317GRE-33-AEC1-Z is housed in a QFN-20 (4mm × 4mm) wettable flank package, supporting automated optical inspection (AOI) and enhanced solder joint reliability for automotive reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced CCM; pull low for light-load efficiency boost; floating prohibited. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; requires ≤51kΩ pulldown if unused to prevent floating. |
| 3,12 VIN | Main input supply | 3.3–45V input path for control circuitry and power stage; decoupling capacitor required near pin. |
| 4,5,10,11 PGND | Power ground return | Low-impedance return for high-current switch node; must be connected to thermal pad and PCB ground plane. |
| 6 BST | Bootstrap supply | Drives high-side MOSFET gate; requires ceramic capacitor between BST and SW pins. |
| 7,8 SW | Switch node | Connection point for external inductor; high di/dt node requiring minimized loop area. |
| 9 EN | Enable control | Logic-level enable: >1.0V = on, <0.85V = off; 190mV hysteresis prevents chatter. |
| 13 SYNCO | Synchronization output | 180° out-of-phase clock output; float when not used for multi-phase coordination. |
| 14 PG | Power good indicator | Open-drain flag active when VOUT is 95–105% of 3.3V; requires external pull-up. |
| 15 NC | No connect | Internally unconnected; must remain floating per datasheet. |
| 16 VCC | Bias supply | Internal 4.9V regulator output; decoupling capacitor required for gate driver stability. |
| 17 AGND | Analog ground | Reference for FB, SS, MODE; separate from PGND to minimize noise coupling. |
| 18 FB | Feedback input | Connected directly to 3.3V output (fixed version); 0.815V reference threshold. |
| 19 SS | Soft-start timing | Capacitor-to-ground sets ramp time; 13µA current source controls inrush limiting. |
| 20 FREQ | Frequency programming | Resistor-to-ground sets fSW (e.g., 62kΩ → 470kHz); enables precise EMI tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Frequency Spread Spectrum (FSS) | Reduces peak EMI by spreading switching energy across 20–30kHz bandwidth-critical for CISPR25 Class 5 compliance. |
| Low-Dropout Mode | Maintains regulation down to VIN = VOUT + 0.5V - sustains 3.3V output during automotive cold-crank (4.5V min). |
| Wettable Flank QFN | Side-wettable leads enable AOI-compatible solder joint inspection - meets IPC-A-610 automotive process requirements. |
| Power Good (PG) Flag | Open-drain output with 35µs delay and 95–105% window - provides deterministic system power sequencing and fault detection. |
| Selective Modulation Control | AAM reduces light-load IQ to 18μA; FCCM ensures constant fSW for noise-sensitive applications like ADAS camera sensors. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in centralized head unit with 12V battery input. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic and memory I/O rails. Use Value: AEC-Q100 qualification and 170°C thermal shutdown ensure uninterrupted operation during engine bay thermal cycling. |
Use Scenario: Supplies image sensor and ISP in forward-facing ADAS camera module exposed to ambient temperature extremes. IC Role / Device Role / Timing Role: High-efficiency 3.3V source with FCCM mode selected to suppress switching noise near analog video paths. Use Value: 350kHz–1000kHz programmability avoids interference with camera pixel clock harmonics and meets ISO 11452-2 immunity targets. |
| Automotive Digital Cluster | Industrial Vehicle Telematics |
|
Use Scenario: Delivers stable 3.3V to microcontroller, TFT controller, and CAN transceiver in digital instrument cluster. IC Role / Device Role / Timing Role: Regulator with PG flag enabling safe boot sequence and brown-out recovery during ignition transients. Use Value: Low 1.7μA shutdown current preserves battery life during vehicle sleep mode (CAN bus monitoring active). |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element in ruggedized telematics control unit (TCU) mounted in cab or chassis. IC Role / Device Role / Timing Role: Input-capable step-down converter handling wide-range 9–36V nominal truck/bus battery inputs. Use Value: 45V absolute max rating and UVLO hysteresis (280mV) prevent latch-up during load-dump events per ISO 7637-2 Pulse 5a. |
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-Z | 6A output current; identical pinout, package, and feature set except lower current rating. | Suitable where peak load remains below 6A; lower thermal margin at full ambient +105°C. | Select when system peak current is verified ≤6A and cost optimization is prioritized over headroom. |
| TPS54560QDGQRQ1 | Non-synchronous design; 60V max VIN; no FSS or wettable flank; 5.5A output; different pinout. | Lacks CISPR25 Class 5 EMI performance and automotive AOI support; requires external HS-FET. | Consider only if higher VIN (up to 60V) is mandatory and EMI filtering budget allows added external components. |
Compared with MPQ4316GRE-33-AEC1-Z, this part delivers 1A higher continuous current and improved thermal derating margin; versus TPS54560QDGQRQ1, it integrates both MOSFETs, includes FSS, and supports automated optical inspection-reducing BOM count and validation effort in AEC-Q100 designs.
Availability
MPQ4317GRE-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, digital clusters, and industrial vehicle telematics requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for MPQ4317GRE-33-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, with a focus on efficiency, integration, and automotive-grade reliability.
The MPQ4317 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for demanding 12V/24V vehicle subsystems requiring low EMI, cold-crank resilience, and AEC-Q100 Grade 1 operation.
FAQ
What is the purpose of the MODE pin on MPQ4317GRE-33-AEC1-Z?
The MODE pin selects between Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM). Pulling it low enables AAM for ultra-low quiescent current (18μA) at light loads; pulling it high forces FCCM for consistent switching frequency and reduced output ripple-critical for noise-sensitive analog circuits.
Does MPQ4317GRE-33-AEC1-Z require an external feedback resistor divider?
No. The "-33" suffix denotes the fixed-output 3.3V version; the FB pin is internally connected to the 0.815V reference and must be tied directly to the output. External resistors are only required for the adjustable-output MPQ4317 variant (e.g., MPQ4317GRE-AEC1-Z).
How is CISPR25 Class 5 compliance achieved without external EMI filters?
CISPR25 Class 5 compliance is achieved using integrated Frequency Spread Spectrum (FSS), symmetric VIN routing architecture, and optimized internal gate drive timing-not standalone. The datasheet specifies that test results assume use of the recommended application circuit with specified EMI filters (Figure 12), meaning board-level filtering remains necessary for full compliance.
What is the function of the SYNCO pin, and can it be left unconnected?
The SYNCO pin outputs a clock signal 180° out-of-phase with the internal oscillator or external SYNCIN signal, enabling phase interleaving in multi-phase designs. It may be safely left floating if unused-no pull-up or pull-down is required, unlike SYNCIN which must never float.
Is the thermal pad on the QFN-20 package electrically connected?
Yes-the exposed thermal pad is internally connected to PGND and must be soldered to a dedicated PCB thermal pad tied to the main ground plane. This connection is essential for achieving the specified θJA of 44°C/W and sustaining 7A output under +105°C ambient conditions.
What happens during automotive cold-crank when input drops to 4.5V?
Under cold-crank (VIN ≥ 4.5V), the MPQ4317 enters low-dropout mode, maintaining regulated 3.3V output with duty cycle >90%. This is enabled automatically-no external configuration is needed-and ensures uninterrupted power to critical microcontrollers and sensors during engine start.
Can MPQ4317GRE-33-AEC1-Z be synchronized to a 2MHz clock?
No. The SYNCIN pin accepts only 350kHz–1000kHz external clocks per datasheet specifications. A 2MHz signal exceeds the maximum rated frequency and may cause erratic switching behavior or failure to lock; the internal oscillator cannot be forced beyond its 1000kHz upper limit.
MPQ4317GRE-33-AEC1-Z 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-Z FAQ
1.How can I place an order for MPQ4317GRE-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-Z reliable?
The price and inventory of MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4317GRE-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4317GRE-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4317GRE-33-AEC1-Z?
MPQ4317GRE-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-Z?
For technical support, including MPQ4317GRE-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4317GRE-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4317GRE-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4317GRE-33-AEC1-Z?
All MPQ4317GRE-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4317GRE-33-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 MPQ4317GRE-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4317GRE-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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