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Monolithic Power Systems Inc. MPQ4317GRE-AEC1-Z
- Part No.:
- MPQ4317GRE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4317GRE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 7A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,378
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Product details
Overview
MPQ4317GRE-AEC1-Z 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, 350–1000kHz configurable switching frequency, frequency spread spectrum (FSS), and 1.7μA shutdown current-designed for automotive infotainment and ADAS power rails.
For engineers reviewing the MPQ4317GRE-AEC1-Z datasheet, MPQ4317GRE-AEC1-Z pinout, MPQ4317GRE-AEC1-Z application, or MPQ4317GRE-AEC1-Z equivalent, key selection criteria include cold-crank low-dropout mode, AAM/FCCM modulation control, ±2% output voltage accuracy at 5V/3.3V, and QFN-20 wettable flank package compliance with automotive EMI Class 5 requirements.
Technical Context
The MPQ4317 employs current-mode control with programmable frequency via external resistor on FREQ pin and supports external synchronization (SYNCIN) with 180° out-of-phase SYNCO output. Its advanced asynchronous modulation (AAM) enables light-load efficiency optimization by reducing switching frequency, while forced continuous conduction mode (FCCM) ensures fixed-frequency operation under all loads.
It integrates thermal shutdown (170°C), over-current protection with hiccup mode, and open-drain power-good (PG) monitoring with 95–105% VOUT window detection. The device operates across –40°C to +150°C junction temperature and supports automotive cold-crank down to 3.3V input with high-duty-cycle capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (3.3V) and load-dump transients. |
| Output Current | 7A continuous - delivers full rated current without derating at TJ ≤ 125°C on standard 4-layer PCB. |
| Quiescent Current | 1.7μA in shutdown - enables always-on systems with minimal battery drain in parked state. |
| Switching Frequency | 350kHz–1000kHz, resistor-programmable - allows EMI optimization and inductor size trade-off. |
| FB Reference Voltage | 0.815V ±1.5% - sets output accuracy for adjustable versions; fixed 3.3V/5V variants achieve ±2% total output tolerance. |
| Thermal Shutdown | 170°C with 20°C hysteresis - provides fault-tolerant protection during overload or poor heatsinking. |
| EMI Compliance | CISPR25 Class 5 peak/average conducted & radiated emissions - validated with recommended filter layout. |
Pinout & Package
MPQ4317GRE-AEC1-Z is housed in a wettable flank QFN-20 (4mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced thermal performance in automotive PCB assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced CCM; pull low for light-load AAM; floating prohibited. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; requires ≤51kΩ pulldown if unused. |
| 3,12 VIN | Main input supply | Supplies control circuitry and HS-FET gate driver; requires local ceramic decoupling. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for switch node current; must be connected to thermal pad. |
| 6 BST | Bootstrap supply | Drives HS-FET gate; requires ceramic capacitor between BST and SW. |
| 7,8 SW | Switch node | Connects internal HS/LS MOSFETs; critical for EMI layout and inductor placement. |
| 9 EN | Enable control | Logic-high (>1V) enables regulator; <0.85V disables with 190mV hysteresis. |
| 13 SYNCO | Synchronization output | 180° out-of-phase clock; float when not used. |
| 14 PG | Power-good indicator | Open-drain output active when VOUT within 95–105% of nominal; requires external pull-up. |
| 15 NC | No connect | Must remain unconnected and floating. |
| 16 VCC | Bias supply | Internal 4.9V LDO output; requires dedicated 1μF ceramic decoupling to AGND. |
| 17 AGND | Analog ground | Reference for FB, SS, MODE; separate from PGND to minimize noise coupling. |
| 18 FB | Feedback input | 0.815V reference; connects to resistor divider (adjustable) or directly to VOUT (fixed). |
| 19 SS | Soft-start timing | 13µA current source charges external capacitor to control ramp rate and limit inrush. |
| 20 FREQ | Frequency programming | Resistor-to-GND sets fSW per published curve (e.g., 62kΩ → 470kHz). |
Key Features
| Feature | Design Value |
|---|---|
| Frequency Spread Spectrum (FSS) | Reduces peak EMI amplitude by spreading switching energy across ~20kHz bandwidth, enabling CISPR25 Class 5 compliance. |
| Low-Dropout Mode | Maintains regulation down to VIN = VOUT + 0.5V at full load, supporting cold-crank operation below 6V. |
| Configurable Light-Load Operation | AAM reduces switching frequency under light load to cut gate drive and switching losses; FCCM ensures constant fSW for noise-sensitive systems. |
| Wettable Flank QFN | Enables AOI-compatible solder joint inspection on automotive production lines without X-ray. |
| Integrated Power MOSFETs | 48mΩ HS-FET + 20mΩ LS-FET reduce conduction loss and eliminate external FET layout complexity. |
Applications
| Automotive Infotainment | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head units with wide input voltage variation and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter supplying core logic rails with PG monitoring and thermal fault response. Use Value: 1.7μA shutdown current extends battery life during vehicle sleep; FSS meets OEM EMC requirements without added filtering. |
Use Scenario: Providing stable 3.3V rail to image sensors and ISP processors in surround-view or forward-facing cameras. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter with fast transient response to handle sensor burst-mode current demands. Use Value: 7A capability supports multi-sensor modules; AAM mode minimizes idle power in parking-assist standby. |
| Instrument Cluster Display | Automotive Telematics Control Unit |
|
Use Scenario: Generating 5V for TFT-LCD backlight drivers and microcontroller peripherals in digital dashboards. IC Role / Device Role / Timing Role: Main system buck regulator with cold-crank support and power-good signaling for safe boot sequencing. Use Value: Low-dropout mode sustains display operation during engine start (VIN dips to ~4.5V); wettable flank ensures IPC-A-610-compliant assembly. |
Use Scenario: Supplying 3.3V to cellular modems, GNSS receivers, and CAN controllers in telematics gateways. IC Role / Device Role / Timing Role: High-reliability power stage with AEC-Q100 Grade 1 qualification and hiccup-mode OCP for field robustness. Use Value: 150°C max junction temperature rating enables operation in sealed enclosures; SYNCIN allows synchronized switching with other converters to avoid beat frequencies. |
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-AEC1-Z | 6A output current; identical pinout, package, and feature set except lower current rating and slightly higher RDS(on). | Suitable for lower-power clusters or infotainment sub-modules where 7A margin is unnecessary. | Select when thermal budget or cost sensitivity outweighs need for full 7A headroom. |
| TPS54560QDGQRQ1 | 60V input, 5A output, no FSS, different pinout (SOIC-8), no wettable flank, 18μA IQ in sleep mode. | Used in industrial or commercial automotive-adjacent systems where CISPR25 Class 5 is not mandated. | Choose only if board redesign is acceptable and EMI filtering can be added externally. |
Compared with MPQ4316GRE-AEC1-Z, this part delivers 1A higher continuous current and tighter RDS(on) for lower conduction loss; versus TPS54560QDGQRQ1, it offers superior EMI performance, automotive-optimized packaging, and higher integration-justifying use where space, thermal, and regulatory constraints are critical.
Availability
MPQ4317GRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster displays requiring stable component supply with AEC-Q100 Grade 1 qualification and long-term automotive lifecycle support.
Supply support for MPQ4317GRE-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 design focus on efficiency, integration, and automotive-grade reliability.
The MPQ4317 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for harsh-environment vehicle subsystems demanding ultra-low quiescent current, EMI robustness, and cold-crank resilience.
FAQ
What is the minimum input voltage required for regulation under full 7A load?
The MPQ4317GRE-AEC1-Z maintains regulation down to VIN = VOUT + 0.5V at 7A in low-dropout mode. For a 5V output, this means stable operation begins at ~5.5V input-critical for automotive cold-crank conditions where battery voltage drops to 3.3V–4.5V, but the device remains functional due to its 3.3V absolute minimum VIN rating and adaptive duty cycle.
How does Frequency Spread Spectrum (FSS) improve EMI performance?
FSS modulates the switching frequency around a center value with a triangular dither (~20kHz span), spreading spectral energy and reducing peak amplitudes by up to 10dB. This enables compliance with CISPR25 Class 5 conducted/radiated emission limits without adding bulkier external filters-verified using the reference EVB layout and specified EMI filter components.
Can the MPQ4317GRE-AEC1-Z be synchronized to an external clock, and what is the valid frequency range?
Yes-pin 2 (SYNCIN) accepts an external clock signal from 350kHz to 1000kHz. The internal oscillator locks to this input, and pin 13 (SYNCO) outputs a 180° phase-inverted copy. This enables multi-converter synchronization to eliminate beat frequencies in multi-rail systems like ADAS domain controllers.
What is the purpose of the MODE pin, and how should it be configured?
The MODE pin selects between Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM). Pulling it low enables AAM for highest light-load efficiency; pulling it high forces FCCM for predictable EMI and transient response. It must never be left floating-use a 100kΩ pull-down (AAM) or pull-up (FCCM) resistor.
Does the device support adjustable output voltage, and what is the feedback reference voltage?
Yes-the base MPQ4317GRE-AEC1-Z is adjustable. It uses a precision 0.815V ±1.5% internal reference at the FB pin. Output voltage is set via an external resistor divider from VOUT to AGND. Fixed-output variants (e.g., MPQ4317GRE-5-AEC1-Z) short FB to VOUT and guarantee ±2% total output accuracy over temperature and line/load.
What thermal performance can be expected on a standard 4-layer PCB?
On a 9cm × 9cm, 2oz copper, 4-layer evaluation board (EVB), θJA is 23°C/W. At 7A output and 12V input, typical case temperature rise is ≤45°C above ambient-well below the 150°C max junction rating. The exposed thermal pad must be soldered to a solid inner-layer copper pour for optimal heat transfer.
Is the wettable flank package necessary for automotive applications?
Yes-wettable flanks enable automated optical inspection (AOI) of solder joints on bottom-terminated QFN packages, a requirement for IPC-A-610 Class 3 and many OEM manufacturing standards. The MPQ4317GRE-AEC1-Z's wettable flank design ensures process control and field reliability without requiring X-ray inspection.
MPQ4317GRE-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-AEC1-Z FAQ
1.How can I place an order for MPQ4317GRE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4317GRE-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-AEC1-Z reliable?
The price and inventory of MPQ4317GRE-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-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4317GRE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4317GRE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4317GRE-AEC1-Z?
MPQ4317GRE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4317GRE-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-AEC1-Z?
For technical support, including MPQ4317GRE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4317GRE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4317GRE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4317GRE-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-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4317GRE-AEC1-Z?
All MPQ4317GRE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4317GRE-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-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4317GRE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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