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Monolithic Power Systems Inc. MPQ4328GRE-AEC1-P
- Part No.:
- MPQ4328GRE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MPQ4328GRE-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 4A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
MPQ4328GRE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 4A output current, operating from 3.3V to 36V input, with 1μA shutdown quiescent current and configurable 200kHz–2.5MHz switching frequency. It integrates 45mΩ high-side and 25mΩ low-side MOSFETs, supports automotive cold-crank via low-dropout mode, and features open-drain power good (PG), SYNC input, and AAM/FCCM mode selection - deployed in ADAS camera modules requiring stable 3.3V/5V rails under wide-temperature and load-dump conditions.
For engineers reviewing the MPQ4328GRE-AEC1-P datasheet, MPQ4328GRE-AEC1-P pinout, MPQ4328GRE-AEC1-P application, or MPQ4328GRE-AEC1-P equivalent, key selection criteria include its 42V load-dump tolerance, -40°C to +150°C junction temperature rating, wettable-flank QFN-14 package for automated optical inspection, and functional safety documentation support (MPSafe™ QM) for automotive system-level design.
Technical Context
The MPQ4328GRE-AEC1-P employs peak current-mode control with frequency foldback during start-up to prevent inductor current runaway. Its dual-MOSFET architecture enables high efficiency across light-to-heavy loads via Advanced Asynchronous Modulation (AAM) at light loads and Forced Continuous Conduction Mode (FCCM) when synchronized to external clock or driven by high ripple demands.
Thermal protection includes thermal shutdown at 155°C–185°C with 20°C hysteresis, while EMC performance is enhanced by spread-spectrum modulation, symmetric VIN pinout, and CISPR25 Class 5 compliance. The device supports fixed-output versions (1V–5V) and adjustable configurations using a 0.8V feedback reference, with BIAS pin optimization reducing IQ to 3µA when connected to 5V VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - accommodates full automotive battery range including cold-crank (down to 3.3V) and 42V load dump transients. |
| Output Current | Up to 4A continuous - sufficient for powering SoCs, image sensors, and CAN transceivers in ADAS domain controllers. |
| Quiescent Current | 1μA in shutdown, 24μA in sleep mode - extends battery life in always-on vehicle subsystems like telematics wake-up circuits. |
| Switching Frequency | 200kHz to 2.5MHz (configurable via FREQ pin resistor) - enables compact magnetics and noise avoidance in sensitive RF zones. |
| Feedback Reference | 0.8V ±10mV over -40°C to +150°C - ensures tight output regulation accuracy for precision analog and digital rail requirements. |
| Package | QFN-14 (4mm × 4mm) with wettable flanks - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles. |
| Protection Features | OCP (hiccup mode), thermal shutdown, UVLO (3.7V rising), OVP (38V rising), and PG monitoring (±5.5% window) - provides robust fault containment without external supervision. |
Pinout & Package
MPQ4328GRE-AEC1-P is housed in a thermally enhanced QFN-14 (4mm × 4mm) package with wettable flanks and exposed thermal pad. Pin 1 is located at the bottom-left corner of the top view, with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 PGND | Power ground return path | Low-inductance connection point for high-current return paths; must be tied directly to PCB ground plane beneath IC. |
| 2, 12 VIN | Main input supply | Dual VIN pins reduce IR drop and EMI; each requires local 10μF ceramic decoupling close to pin for transient suppression. |
| 3 BST | Bootstrap capacitor node | Supplies gate drive for high-side MOSFET; requires 0.1μF X7R ceramic capacitor between BST and SW for reliable bootstrapping. |
| 4 SYNC/MODE | Mode selection & synchronization input | Pull ≤0.4V for AAM (light-load efficiency), ≥1.4V for FCCM, or connect to external 200kHz–2.5MHz clock for precise timing alignment. |
| 5 BIAS | External bias supply input | Connect to 5V VOUT to reduce IQ to 3μA; avoids floating to prevent erratic startup or increased leakage. |
| 6 VCC | Internal LDO output | 5V ±1% regulated supply for internal logic/gate drivers; requires ≥1μF ceramic capacitor to ground for stability. |
| 7 AGND | Analog ground reference | Separate ground for feedback and sensing circuitry; must be routed away from noisy PGND traces to minimize offset error. |
| 8 FB | Feedback voltage sense | 0.8V reference threshold; for adjustable outputs, use resistor divider from VOUT to AGND with trace routing minimizing parasitic capacitance. |
| 9 FREQ | Switching frequency set | Resistor to ground sets fSW: 49.9kΩ → ~410kHz, 19.6kΩ → ~1MHz, 8.66kΩ → ~2.2MHz - enables EMI tuning per board layout. |
| 10 PG | Power good open-drain output | Asserts high when VOUT is within 94.5–105.5% of nominal; requires external pull-up (e.g., to 3.3V) for system sequencing. |
| 11 EN | Enable control input | Active-high enable with 1.02V rising threshold; internal 100kΩ pull-down ensures safe default-off state if left unconnected. |
| 14 SW | Switch node | Connection point between HS-FET source and LS-FET drain; requires minimal loop area with output inductor and bootstrap cap for low EMI. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +150°C operation with full automotive stress testing - suitable for engine bay and front-end radar applications. |
| Advanced Asynchronous Modulation (AAM) | Reduces switching losses at light loads by skipping pulses, achieving >85% efficiency at 1mA output - critical for always-on vehicle networks. |
| MeshConnect™ flip-chip packaging | Improves thermal resistance (θJC = 7.9°C/W) and reduces package inductance - enhances power delivery stability and EMI margin. |
| Frequency Spread Spectrum (FSS) | Modulates fSW by ±10% to lower peak radiated emissions - helps meet CISPR25 Class 5 requirements without added shielding. |
| 50ns minimum on-time (tON_MIN) | Enables high VIN-to-low VOUT conversion (e.g., 24V→3.3V at 2.2MHz) without pulse-skipping instability - supports compact high-ratio designs. |
| Wettable flank QFN-14 | Facilitates automated optical inspection of solder joints - essential for zero-defect manufacturing in Tier-1 automotive production lines. |
Applications
| Automotive Infotainment Head Unit | ADAS Front Camera Module |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in centralized infotainment units with variable battery input (9V–16V) and strict EMC limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic rails; operates in FCCM during video processing bursts and AAM during standby. Use Value: 2.2MHz switching enables <10mm² solution size; FSS and symmetric VIN pinout reduce conducted emissions below CISPR25 Class 5 limits. |
Use Scenario: Supplies 3.3V to CMOS image sensor and 1.8V to ISP in forward-facing ADAS cameras exposed to under-hood temperatures up to +125°C ambient. IC Role / Device Role / Timing Role: Dual-rail power source with independent feedback loops (via resistor dividers); uses low-dropout mode during cold-crank (5.5V battery). Use Value: 150°C max junction rating and 42V load-dump tolerance ensure uninterrupted operation during jump-starts and alternator transients. |
| Automotive Digital Cluster | Industrial Vehicle Telematics Gateway |
|
Use Scenario: Delivers 3.3V to MCU, TFT controller, and CAN FD transceiver in digital instrument clusters requiring high reliability and low standby current. IC Role / Device Role / Timing Role: Always-on power manager with PG signal enabling MCU-controlled power sequencing and brown-out detection. Use Value: 1μA shutdown IQ extends backup battery life beyond 10 years; wettable flanks ensure AOI-compatible assembly for zero-defect field deployment. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element in ruggedized telematics gateways operating across commercial and off-road vehicle fleets. IC Role / Device Role / Timing Role: Main 5V intermediate rail generator feeding secondary LDOs; synchronized to system clock to avoid beat frequencies with cellular bands. Use Value: SYNC input allows deterministic timing alignment with baseband processor clocks, eliminating intermittent interference in LTE band 13/20 reception. |
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 |
|---|---|---|---|
| LM61480-Q1 | Higher 5A output, fixed 400kHz fSW, no FSS or wettable flanks; 2.1V min VIN | Lacks spread-spectrum and AAM mode - less suited for ultra-low-noise ADAS imaging rails | Prefer MPQ4328GRE-AEC1-P when EMI headroom is constrained or 1μA shutdown IQ is required. |
| TPS54560QDGQRQ1 | Lower 5A rating but wider 3.5V–60V VIN range; no integrated LS-FET (external diode needed) | Requires external catch diode and larger solution size; lacks PG and SYNC functionality | Choose MPQ4328GRE-AEC1-P for compact, fully integrated solutions with sequencing and synchronization capability. |
Compared with LM61480-Q1 and TPS54560QDGQRQ1, MPQ4328GRE-AEC1-P delivers superior light-load efficiency via AAM, tighter thermal management through MeshConnect™ packaging, and automotive-grade manufacturability via wettable flanks - making it optimal for space-constrained, noise-sensitive ADAS and cluster applications.
Availability
MPQ4328GRE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and digital instrument clusters requiring stable component supply with AEC-Q100 compliance, long-term lifecycle assurance, and zero-defect manufacturing traceability.
Supply support for MPQ4328GRE-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.
The MPQ4328 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for demanding vehicular environments - emphasizing low IQ, wide VIN range, functional safety readiness, and robust EMC performance in ADAS and infotainment systems.
FAQ
What is the maximum allowable input voltage for MPQ4328GRE-AEC1-P during automotive load dump?
The device withstands 42V transient input for automotive load dump per ISO16750-2, with over-voltage protection triggering at 38V typical. This rating is validated under AEC-Q100 stress conditions and does not require external clamping for standard 12V system applications.
Can MPQ4328GRE-AEC1-P operate with a 5V input to generate 3.3V output?
Yes - with a minimum on-time of 50ns and 2.5MHz max switching frequency, the device supports high step-down ratios. At 5V input, 3.3V output is achievable using FCCM mode and appropriate inductor selection (e.g., 1μH), maintaining >90% efficiency at 2A load.
How does the BIAS pin affect quiescent current performance?
Connecting BIAS to a clean 5V VOUT reduces typical IQ from 24μA to 3μA in sleep mode by powering internal regulators more efficiently. This configuration is mandatory for sub-10μA system standby targets and must be implemented before applying VIN to avoid latch-up risk.
Is MPQ4328GRE-AEC1-P compatible with lead-free and halogen-free PCB assembly processes?
Yes - the device is RoHS-compliant, lead-free, and halogen-free, qualified for standard SnAgCu reflow profiles (JEDEC J-STD-020D). Its MSL Level 1 rating allows unlimited floor life at ≤30°C/60% RH, eliminating bake requirements prior to assembly.
Does MPQ4328GRE-AEC1-P support output discharge during shutdown?
Yes - the IC integrates an internal discharge FET that sinks 2mA when EN is low and VOUT exceeds 0.3V, ensuring rapid rail collapse for controlled power sequencing. This eliminates need for external discharge resistors in most automotive applications.
What thermal derating applies when operating above 100°C ambient temperature?
Using θJA = 46.7°C/W (JESD51-7 4-layer board), maximum continuous output current drops from 4A at 25°C ambient to ~2.8A at 100°C ambient. For sustained >100°C operation, thermal vias under the exposed pad and copper pour are strongly recommended to leverage θJC = 7.9°C/W.
How is power good (PG) assertion timing specified relative to output regulation?
PG asserts high after a 1.2ms delay once VOUT reaches 94.5% of target, with 160μs deglitch filtering to reject transient dips. PG deasserts when VOUT falls below 93% or rises above 107%, providing robust sequencing feedback for downstream processors and FPGAs.
MPQ4328GRE-AEC1-P 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
- 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:
- 4A
- 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)
MPQ4328GRE-AEC1-P FAQ
1.How can I place an order for MPQ4328GRE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4328GRE-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 MPQ4328GRE-AEC1-P reliable?
The price and inventory of MPQ4328GRE-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 MPQ4328GRE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4328GRE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4328GRE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4328GRE-AEC1-P?
MPQ4328GRE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4328GRE-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 MPQ4328GRE-AEC1-P?
For technical support, including MPQ4328GRE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4328GRE-AEC1-P requirements.
6.How does Aetrix verify that MPQ4328GRE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4328GRE-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 MPQ4328GRE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4328GRE-AEC1-P?
All MPQ4328GRE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4328GRE-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 MPQ4328GRE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4328GRE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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