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Monolithic Power Systems Inc. MPQ4326GRE-AEC1-Z
- Part No.:
- MPQ4326GRE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MPQ4326GRE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 6A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
MPQ4326GRE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 45mΩ high-side and 25mΩ low-side MOSFETs, delivering up to 6A output current at input voltages up to 36V and load-dump tolerance to 42V. It features 1μA shutdown current, configurable 200kHz–2.5MHz switching frequency, and power-good monitoring - deployed in automotive infotainment and ADAS power rails.
For engineers reviewing the MPQ4326GRE-AEC1-Z datasheet, MPQ4326GRE-AEC1-Z pinout, MPQ4326GRE-AEC1-Z application, or MPQ4326GRE-AEC1-Z equivalent, key selection criteria include cold-crank dropout performance, AAM/FCCM mode control via SYNC/MODE pin, 0.8V feedback reference accuracy across –40°C to +150°C, and QFN-14 wettable-flank package compatibility with automotive reflow standards.
Technical Context
This buck regulator uses peak-current-mode control with frequency foldback during startup to prevent inductor current runaway. Its dual-MOSFET architecture supports high duty cycle operation for automotive cold-crank (VIN down to 3.3V) and integrates internal gate drivers with BST capacitor biasing for efficient high-side switching.
The device implements multiple protection mechanisms: hiccup-mode overcurrent protection on both high-side (8.5–13A) and low-side (6–9A) paths, thermal shutdown at 155–185°C with 20°C hysteresis, and precise PG monitoring with ±5.5% VOUT window and 1.2ms start-up delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports wide automotive battery range including cold-crank transients. |
| Output Current | Up to 6A continuous - enables single-chip supply for multi-rail SoC subsystems. |
| Quiescent Current | 1μA in shutdown - preserves battery life in always-on vehicle modules. |
| Switching Frequency | 200kHz to 2.5MHz - configurable via external resistor or external clock sync for EMI optimization. |
| Feedback Reference | 0.800V ±6mV (–40°C to +150°C) - ensures stable regulation under full automotive temperature range. |
| Power Good Threshold | 94.5%–105.5% of nominal VOUT - provides reliable rail-valid indication for downstream logic sequencing. |
| Thermal Shutdown | 155°C to 185°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MPQ4326GRE-AEC1-Z is housed in a wettable-flank QFN-14 (4mm × 4mm) package optimized for automotive solder-joint inspection and thermal performance (θJA = 46.7°C/W on JESD51-7 board).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | PGND | Power ground return path for high-current switching node; must be connected to low-impedance ground plane. |
| 2, 12 | VIN | Main input supply (3.3–36V); dual pins reduce IR drop and improve transient response; requires local ceramic decoupling. |
| 3 | BST | Bootstrap supply for high-side gate driver; requires 0.1µF ceramic capacitor between BST and SW pins. |
| 4 | SYNC/MODE | Configures operating mode: <0.4V → AAM (light-load efficiency), >1.4V → FCCM (fixed-frequency), or external clock sync. |
| 5 | BIAS | External 5V bias input to reduce IQ; connect to VOUT for 5V versions or dedicated 5V rail for other outputs. |
| 6 | VCC | Internal 5V bias rail output; requires ≥1µF ceramic capacitor to AGND for stable gate drive and control logic. |
| 7 | AGND | Analog ground reference for FB, PG, and internal error amplifier; separate from PGND to minimize noise coupling. |
| 8 | FB | Feedback input with 0.8V reference; for adjustable version, connects to resistor divider; fixed versions tie directly to VOUT. |
| 9 | FREQ | Resistor-to-ground sets fSW: 49.9kΩ → ~410kHz, 19.6kΩ → ~1MHz, 8.66kΩ → ~2.2MHz. |
| 10 | PG | Open-drain power-good signal; pulled high when VOUT is within ±5.5%; requires external pull-up resistor. |
| 11 | EN | Enable input; active-high with 1.02V threshold; <0.85V disables converter and reduces IQ to 1μA. |
| 14 | SW | Switch node connecting HS-FET source and LS-FET drain; critical for layout - minimize loop area and parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +150°C TJ) with 42V load-dump tolerance per ISO16750. |
| Efficiency optimization | Advanced Asynchronous Modulation (AAM) reduces switching losses at light loads, achieving >90% efficiency at 1mA with 12V→5V conversion. |
| EMI mitigation | FSS modulation, symmetric VIN pinout, and CISPR25 Class 5 compliance support stringent automotive EMC requirements. |
| Thermal robustness | MeshConnect™ flip-chip QFN package lowers θJC to 7.9°C/W and improves power dissipation margin under 6A load. |
| Startup reliability | Frequency foldback and 50ns minimum on-time enable stable operation during low-VIN cold-crank conditions (e.g., 4.5V@6A). |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
|
Use Scenario: Powering SoC, DDR memory, and display interface in head-unit systems with variable battery voltage and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter supplying core logic rails; synchronized to system clock to avoid beat frequencies. Use Value: AAM mode extends runtime in standby; wettable flanks ensure IPC-A-610-compliant solder joints for field-reliability. |
Use Scenario: Providing clean, regulated 3.3V for image sensor and ISP in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Point-of-load regulator with fast transient response to handle burst-mode sensor readout current spikes. Use Value: 50ns tON_MIN enables stable 3.3V output even during 6V cold-crank; PG signal sequences sensor initialization. |
| Instrument Cluster | Body Control Module |
|
Use Scenario: Supplying microcontroller, CAN transceiver, and backlight LED driver in digital dashboards exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Main 5V rail generator with thermal shutdown and OVP protection against alternator transients. Use Value: 150°C max junction rating and –40°C startup capability ensure uninterrupted operation in under-hood environments. |
Use Scenario: Powering door module MCUs and LIN transceivers where ultra-low IQ is critical for battery drain control. IC Role / Device Role / Timing Role: Always-on 3.3V supply with 1μA shutdown current and wake-up via EN pin from low-power sensor interrupt. Use Value: Sleep-mode IQ of 24μA minimizes annual parasitic drain; BIAS connection further cuts IQ to 3μA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4326JGRE-AEC1-Z | QFN-16 package with NC pins; identical electrical specs but different pinout and thermal resistance (θJA = 50.2°C/W). | Requires PCB redesign due to extra pins and altered SW/PGND layout; preferred for higher thermal margin in lower-power designs. | Select when board space allows larger footprint and thermal validation shows QFN-16 improves junction temp by >5°C at 5A. |
| TPS546B24RVFT | 6A buck with PMBus interface, 4.5–18V input, no AEC-Q100 qualification; higher IQ (12μA shutdown) and no 42V OVP. | Targeted at industrial servers, not automotive; lacks cold-crank support and load-dump protection. | Only consider for non-automotive applications requiring digital telemetry; not a drop-in replacement. |
Compared with MPQ4326GRE-AEC1-Z, the MPQ4326JGRE-AEC1-Z offers identical regulation performance in a thermally enhanced package, while the TPS546B24RVFT trades automotive ruggedness for digital configurability - making the MPQ4326GRE-AEC1-Z optimal for cost-sensitive, AEC-Q100–mandated 36V buck applications.
Availability
MPQ4326GRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster power supplies requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for MPQ4326GRE-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 for automotive, industrial, and computing markets.
The MPQ4326 product line delivers AEC-Q100–qualified, high-efficiency buck converters optimized for automotive subsystems demanding wide VIN range, low IQ, and robust thermal/EMI performance.
FAQ
What is the minimum input voltage required for startup?
The MPQ4326GRE-AEC1-Z has a VIN UVLO rising threshold of 3.5V to 3.9V, allowing reliable startup down to 3.3V input. This enables operation during automotive cold-crank events where battery voltage dips below 6V, provided the output load does not exceed the achievable duty cycle limit.
How do I configure the switching frequency?
Connect a resistor from the FREQ pin to GND: 49.9kΩ sets fSW ≈ 410kHz, 19.6kΩ ≈ 1MHz, and 8.66kΩ ≈ 2.2MHz. The device also accepts external clock signals from 200kHz to 2.5MHz on the SYNC/MODE pin for precise EMI alignment.
Can the BIAS pin be left floating?
No - the BIAS pin must not be floated. For 5V output versions, connect BIAS directly to VOUT; for other outputs, connect to a stable 5V source or AGND. Floating BIAS risks increased quiescent current and potential instability in light-load regulation.
What is the purpose of the NC pins on the QFN-16 variant?
The two NC pins (pins 2 and 14) on MPQ4326JGRE-AEC1-Z are internally unconnected and must be left floating per datasheet guidance. They provide mechanical symmetry and routing flexibility but carry no electrical function - never tie them to power or ground.
Does this part support forced continuous conduction mode (FCCM)?
Yes - pulling the SYNC/MODE pin above 1.4V enables FCCM, eliminating frequency variation at light loads. This ensures constant switching frequency for predictable EMI filtering and avoids audible noise in sensitive audio or camera applications.
How is power-good (PG) behavior defined during startup?
PG asserts high after a 1.2ms delay once VOUT reaches 94.5% of target and remains within ±5.5%. It deasserts low if VOUT falls below 93% or exceeds 107%, with 160µs deglitching on both edges to reject transient disturbances.
Is the QFN-14 package compatible with standard automotive reflow profiles?
Yes - the wettable-flank QFN-14 package meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for lead-free reflow up to 260°C peak. Its flank geometry enables automated optical inspection (AOI) of solder fillets per IPC-A-610 Class 3 requirements.
MPQ4326GRE-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- 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)
MPQ4326GRE-AEC1-Z FAQ
1.How can I place an order for MPQ4326GRE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4326GRE-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 MPQ4326GRE-AEC1-Z reliable?
The price and inventory of MPQ4326GRE-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 MPQ4326GRE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4326GRE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4326GRE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4326GRE-AEC1-Z?
MPQ4326GRE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4326GRE-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 MPQ4326GRE-AEC1-Z?
For technical support, including MPQ4326GRE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4326GRE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4326GRE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4326GRE-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 MPQ4326GRE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4326GRE-AEC1-Z?
All MPQ4326GRE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4326GRE-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 MPQ4326GRE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4326GRE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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