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Monolithic Power Systems Inc. MPQ4326MGRE-AEC1-Z
- Part No.:
- MPQ4326MGRE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MPQ4326MGRE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ/0.8V 6A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,842
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Product details
Overview
MPQ4326MGRE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter with integrated high-side (45 mΩ) and low-side (25 mΩ) MOSFETs, configurable switching frequency (200 kHz–2.5 MHz), 36 V max input, 6 A continuous output, and 1 µA shutdown quiescent current. It delivers regulated 5 V output in fixed-version configurations and supports automotive cold-crank via low-dropout mode.
For engineers reviewing the MPQ4326MGRE-AEC1-Z datasheet, MPQ4326MGRE-AEC1-Z pinout, MPQ4326MGRE-AEC1-Z application, or MPQ4326MGRE-AEC1-Z equivalent, key selection considerations include load-dump survival (42 V), CISPR25 Class 5 EMI compliance, integrated input capacitors, wettable-flank QFN-14 package, and functional safety documentation (MPSafe™ QM).
Technical Context
The MPQ4326MGRE-AEC1-Z employs peak current mode control with frequency foldback during start-up to prevent inductor current runaway. Its advanced asynchronous modulation (AAM) dynamically scales switching frequency at light loads to reduce gate driver and switching losses, achieving 24 µA sleep-mode IQ without external bias.
It integrates dual VIN pins with internal connection and on-die 0.1 µF input capacitors per VIN–PGND path, enabling symmetric VIN pinout and optimized EMC performance. The device supports external clock synchronization (90–110% freerunning fSW), hiccup over-current protection, and thermal shutdown with 155°C trip and 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3 V to 36 V - supports wide automotive battery range including cold-crank (down to 3.3 V) and load dump survival up to 42 V. |
| Output Current | 6 A continuous - sustained delivery under full thermal derating at TJ ≤ 150°C in QFN-14 package. |
| Quiescent Current | 1 µA shutdown / 24 µA sleep mode - enables always-on systems in battery-powered automotive modules. |
| Switching Frequency | 200 kHz to 2.5 MHz (configurable via resistor or external clock) - allows optimization for size (high fSW) or efficiency (low fSW). |
| Feedback Reference | 0.800 V ±6 mV (–40°C to +150°C) - enables precise output regulation across automotive temperature range. |
| Power Good Threshold | 94.5%–105.5% of nominal VOUT - provides accurate enable/disable signaling for downstream logic sequencing. |
| Thermal Protection | 155°C shutdown with 20°C hysteresis - ensures fault-tolerant operation without latch-off during transient overload. |
Pinout & Package
MPQ4326MGRE-AEC1-Z is housed in a wettable-flank QFN-14 (4 mm × 4 mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced thermal dissipation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 PGND | Power ground reference | Low-inductance return path for power stage; must be connected to solid ground plane beneath IC. |
| 2, 12 VIN | Main input supply | Dual pins internally tied; each requires local 0.1 µF ceramic capacitor to PGND for EMI suppression. |
| 3 BST | Bootstrap supply for HS-FET gate driver | Requires ceramic capacitor (e.g., 0.1 µF) between BST and SW to sustain high-side conduction. |
| 4 SYNC/MODE | Frequency sync & modulation mode select | Pull <0.4 V for AAM; >1.4 V for FCCM; tie to external clock for synchronization (90–110% fSW). |
| 5 BIAS | External bias voltage input | Connect to 5 V rail to reduce IQ to 3 µA; mandatory for lowest-power operation in fixed-5V designs. |
| 6 VCC | Internal LDO output | 5 V ±1% regulated supply for control circuitry; requires ≥1 µF decoupling capacitor to AGND. |
| 7 AGND | Analog ground reference | Separate from PGND; connects feedback divider and sensitive analog nodes to minimize noise coupling. |
| 8 FB | Output voltage feedback input | 0.8 V reference threshold; for fixed-output versions, directly tied to VOUT; no external divider needed. |
| 9 FREQ | Resistor-programmable frequency set | Grounded resistor sets fSW: 49.9 kΩ → ~410 kHz; 19.6 kΩ → ~1 MHz; 8.66 kΩ → ~2.2 MHz. |
| 10 PG | Open-drain power-good indicator | Asserts high when VOUT is within ±5.5%; requires external pull-up for microcontroller monitoring. |
| 11 EN | Enable control input | Active-high logic: >1.02 V enables; <0.85 V disables; internal 100 kΩ pull-down ensures default-off state. |
| 14 SW | Switch node | Connection point between HS-FET source and LS-FET drain; critical for layout-minimize loop area with output cap. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated input capacitors | Two 0.1 µF on-die VIN-to-PGND caps reduce external component count and improve CISPR25 Class 5 EMI margin. |
| MeshConnect™ flip-chip packaging | Enables lower thermal resistance (θJC = 7.9°C/W) and improved power density vs. wire-bond QFN alternatives. |
| Frequency spread spectrum modulation | Reduces peak EMI amplitude by spreading switching energy across narrow band, easing EMC certification. |
| Wettable flanks | Facilitates automated solder-joint inspection (AOI) in automotive manufacturing without X-ray requirement. |
| MPSafe™ QM functional safety support | Includes documentation package for ISO 26262 ASIL-B system integration without requiring hardware-level safety mechanisms. |
Applications
| Automotive Infotainment | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head-unit systems with variable battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5 V buck regulator delivering stable 6 A rail; manages cold-crank dips and load-dump transients. Use Value: Integrated input caps and CISPR25 Class 5 compliance eliminate need for external EMI filters, reducing BOM cost and board area. |
Use Scenario: Supplying image sensor, ISP, and interface logic in surround-view or forward-facing camera ECUs. IC Role / Device Role / Timing Role: High-efficiency 3.3 V or 5 V power stage operating in AAM mode during standby to extend vehicle-off battery life. Use Value: 1 µA shutdown IQ and 24 µA sleep IQ enable >1-year battery hold-up for always-on vision systems without parasitic drain. |
| Automotive Instrument Cluster | Industrial Vehicle Telematics |
|
Use Scenario: Generating multiple rails (e.g., 5 V, 3.3 V) for TFT LCD backlight drivers, microcontrollers, and CAN transceivers. IC Role / Device Role / Timing Role: Fixed-output version used as main 5 V supply; PG signal sequences display initialization and fault reporting. Use Value: Power-good accuracy (±5.5%) and fast 1.2 ms startup delay ensure deterministic boot timing for cluster MCU and GPU. |
Use Scenario: Powering LTE/GNSS modules, secure MCU, and cellular modem in ruggedized telematics gateways deployed in trucks and construction equipment. IC Role / Device Role / Timing Role: Primary 5 V/6 A converter supporting wide input (6–36 V) and operating across –40°C to +125°C ambient. Use Value: AEC-Q100 Grade 1 qualification and –40°C to +150°C junction rating guarantee reliability in unheated enclosures exposed to engine bay temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4326GR-AEC1-Z | Same die, non-wettable-flank QFN-14 package; lacks AOI-compatible edge plating. | Acceptable for non-automotive or non-AOI production lines; not compliant with OEM visual inspection requirements. | Select only if AOI capability is unavailable and thermal performance margin permits higher θJA. |
| TPS546B24RVFT | 6 A, 36 V input, but no integrated input capacitors; requires external 2×0.1 µF + bulk input caps; higher BOM count. | Used in industrial servers where EMI is less constrained; lacks AEC-Q100 qualification and automotive temp range. | Choose only if design already uses TI ecosystem tools and does not require load-dump immunity or wettable flanks. |
Compared with MPQ4326MGRE-AEC1-Z, the MPQ4326GR-AEC1-Z sacrifices manufacturability assurance for marginal cost reduction, while the TPS546B24RVFT trades integrated EMI mitigation and automotive qualification for broader industrial toolchain support.
Availability
MPQ4326MGRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument clusters requiring stable component supply with AEC-Q100 traceability and long-term lifecycle commitment.
Supply support for MPQ4326MGRE-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 core expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPQ4326M product line targets automotive power systems demanding high reliability, low EMI, and extended temperature operation-designed specifically for infotainment, clusters, and ADAS subsystems meeting ISO 16750 and AEC-Q100 requirements.
FAQ
What is the purpose of the BIAS pin, and how should it be connected?
The BIAS pin reduces quiescent current from 24 µA to 3 µA when connected to a stable 5 V rail (e.g., VOUT in fixed-5V versions). For non-5V outputs, connect to an external 5 V source or ground-but never leave floating. Connection must occur after VIN is applied to avoid latch-up.
Does MPQ4326MGRE-AEC1-Z support external frequency synchronization?
Yes. The SYNC/MODE pin accepts an external clock from 200 kHz to 2.5 MHz. When driven, the device locks to the external frequency within ±5% accuracy and operates in forced continuous conduction mode (FCCM), eliminating beat frequencies in multi-rail systems.
How does the integrated input capacitor affect PCB layout?
The two on-die 0.1 µF VIN-to-PGND capacitors eliminate the need for discrete high-frequency input caps near the IC. Layout must still place bulk input capacitance (e.g., 10–22 µF) upstream, but high-frequency loop area is minimized, improving EMI robustness without extra footprints.
What protection features are implemented, and how do they behave?
The device includes hiccup-mode over-current protection (OCP), over-voltage protection (OVP) tripping at 36–40 V, thermal shutdown at 155–185°C with 20°C hysteresis, and UVLO (3.5–3.9 V rising). All protections are auto-recovering except thermal shutdown, which resets once junction cools below trip minus hysteresis.
Is the MPQ4326MGRE-AEC1-Z pin-compatible with other MPQ4326 variants?
Yes-MPQ4326MGRE-AEC1-Z shares identical pinout and footprint with all MPQ4326M variants (e.g., MPQ4326GR-AEC1-Z, MPQ4326MG-AEC1-Z). Differences are limited to package finish (wettable flanks), MSL rating, and top marking; no schematic or layout changes are required for substitution.
What is the minimum on-time specification, and why does it matter?
The minimum on-time is 50 ns (typical). This determines the lowest achievable output voltage at high input voltages (e.g., VOUT = VIN × tON_min × fSW). At 36 V input and 2.2 MHz fSW, it supports ≥3.9 V output-sufficient for common 3.3 V and 5 V rails with margin.
Can the MPQ4326MGRE-AEC1-Z operate in dropout mode, and what is its dropout behavior?
Yes. In low-dropout mode, the high-side FET remains fully on during cold-crank events down to VIN = VOUT + 0.1 V. At 5 V output and 125°C junction, dropout voltage is <300 mV at 6 A, enabling uninterrupted operation during 6 V battery dips.
MPQ4326MGRE-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V (1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, 5V)
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-QFN (4x4)
MPQ4326MGRE-AEC1-Z FAQ
1.How can I place an order for MPQ4326MGRE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4326MGRE-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 MPQ4326MGRE-AEC1-Z reliable?
The price and inventory of MPQ4326MGRE-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 MPQ4326MGRE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4326MGRE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4326MGRE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4326MGRE-AEC1-Z?
MPQ4326MGRE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4326MGRE-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 MPQ4326MGRE-AEC1-Z?
For technical support, including MPQ4326MGRE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4326MGRE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4326MGRE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4326MGRE-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 MPQ4326MGRE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4326MGRE-AEC1-Z?
All MPQ4326MGRE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4326MGRE-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 MPQ4326MGRE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4326MGRE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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