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Monolithic Power Systems Inc. MPQ4328GRE-5-AEC1-Z
- Part No.:
- MPQ4328GRE-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MPQ4328GRE-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 4A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ4328GRE-5-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering up to 4A output current with 3.3V–36V input range, fixed 5V output, and 1μA shutdown quiescent current. It integrates 45mΩ high-side and 25mΩ low-side MOSFETs, supports 200kHz–2.5MHz configurable switching frequency, and features power good (PG), frequency synchronization, and AAM/FCCM mode selection - deployed in automotive infotainment and ADAS power rails.
For engineers reviewing the MPQ4328GRE-5-AEC1-Z datasheet, MPQ4328GRE-5-AEC1-Z pinout, MPQ4328GRE-5-AEC1-Z application, or MPQ4328GRE-5-AEC1-Z equivalent, key selection criteria include its 5V fixed output, wettable-flank QFN-14 package, AEC-Q100 qualification, 150°C junction temperature rating, and integrated thermal shutdown with 170°C trip threshold.
Technical Context
The MPQ4328GRE-5-AEC1-Z uses peak current mode control with programmable frequency via external resistor on FREQ pin and supports external clock synchronization (200kHz–2.5MHz). Its advanced asynchronous modulation (AAM) enables light-load efficiency optimization by reducing switching frequency, while forced continuous conduction mode (FCCM) ensures constant fSW for noise-sensitive applications.
It implements dual-stage protection: over-current protection (OCP) with hiccup mode using valley current sensing on LS-FET and cycle-by-cycle limiting on HS-FET (5.5–9.5A), plus thermal shutdown at 155–185°C with 20°C hysteresis. The device enters low-dropout mode during cold-crank conditions and supports bias voltage connection to VOUT for reduced IQ.
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 load dump (up to 42V transient tolerance). |
| Output Voltage | Fixed 5V ±1% - eliminates external feedback divider; FB pin internally tied to 0.8V reference for precise regulation. |
| Max Output Current | 4A continuous - enabled by integrated 45mΩ HS-FET and 25mΩ LS-FET with optimized thermal resistance (θJA = 46.7°C/W on JEDEC board). |
| Quiescent Current | 1μA in shutdown, 24μA in sleep mode - extends battery life in always-on automotive modules such as telematics and domain controllers. |
| Switching Frequency | Configurable 200kHz–2.5MHz - allows EMI optimization and inductor size reduction; supports spread-spectrum modulation per CISPR25 Class 5. |
| Operating Junction Temp | −40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and cockpit electronics. |
| Protection Features | OCP (hiccup), thermal shutdown (155–185°C), UVLO (3.5V rising), OVP (36–40V), and PG monitoring (±5.5% window) - enables robust fault recovery without external circuitry. |
Pinout & Package
MPQ4328GRE-5-AEC1-Z is housed in a wettable-flank QFN-14 (4mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced thermal performance in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 PGND | Power ground return path | Dual pins reduce ground loop impedance and improve thermal dissipation; must be connected to solid ground plane beneath IC. |
| 2, 12 VIN | Main input supply | Two parallel VIN pins minimize IR drop and enable localized 10µF ceramic decoupling per pin near entry point. |
| 3 BST | Bootstrap capacitor node | Connects to SW via 0.1µF ceramic capacitor; supplies gate drive for HS-FET; critical for stable high-duty-cycle operation. |
| 4 SYNC/MODE | Frequency sync & modulation mode control | Pull <0.4V for AAM (light-load efficiency), >1.4V for FCCM (fixed-frequency), or drive with external clock for synchronized multi-rail systems. |
| 5 BIAS | External bias supply input | Connect to 5V VOUT to reduce IQ to 3µA; prevents premature startup if biased before VIN ramp-up. |
| 6 VCC | Internal LDO output | 5V ±1% regulated supply for internal logic/gate drivers; requires ≥1µF ceramic capacitor placed adjacent to pin. |
| 7 AGND | Analog ground reference | Separate from PGND to isolate feedback path; connects to FB and VCC decoupling; must tie to PGND at single point. |
| 8 FB | Feedback input | Internally connected to 0.8V reference for fixed 5V output; no external resistor divider required. |
| 9 FREQ | Frequency configuration | Resistor-to-ground sets fSW: 49.9kΩ → ~410kHz, 19.6kΩ → ~1MHz, 8.66kΩ → ~2.2MHz. |
| 10 PG | Power good open-drain output | Asserts high when VOUT is within 94.5–105.5% of 5V; requires external pull-up to system rail for sequencing or fault reporting. |
| 11 EN | Enable control | Active-high with 0.85–1.02V threshold; internal 100kΩ pull-down ensures default-off state; avoids floating risk. |
| 14 SW | Switch node | Drives external inductor; high di/dt node requiring tight layout, minimal trace length, and Kelvin connection to BST capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +150°C operation with full temperature cycling, HTOL, and ESD testing - suitable for engine bay and ADAS ECU deployment. |
| Wettable-flank QFN-14 package | Enables automated solder-joint inspection (AOI) and improves reflow yield in high-reliability automotive manufacturing. |
| Advanced Asynchronous Modulation (AAM) | Reduces switching frequency at light loads to cut gate driver and switching losses - achieves >85% efficiency at 1mA load with 12V input. |
| MeshConnect™ flip-chip construction | Low-inductance internal interconnects and symmetric VIN pinout suppress EMI and meet CISPR25 Class 5 radiated emissions limits. |
| Low-dropout mode | Maintains regulation down to VIN = VOUT + 0.5V during cold-crank (e.g., 5.5V input → 5V output), preventing system brownout. |
| Integrated power good (PG) with deglitching | 160µs rising/falling deglitch filters noise; PG asserts only after stable regulation confirmed - enables safe processor reset sequencing. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power Rail |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in center-stack head units with variable battery input (6V–16V) and strict EMC requirements. IC Role / Device Role / Timing Role: Primary 5V intermediate bus regulator converting 12V battery to clean, low-noise 5V for digital subsystems. Use Value: AAM mode maintains >90% efficiency at standby current (<10mA); FSS modulation passes CISPR25 Class 5 without shielding. |
Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Point-of-load (POL) regulator delivering stable 5V under wide ambient temperature (−40°C to +105°C) and vibration. Use Value: 150°C TJ rating and thermal shutdown ensure reliability in sealed enclosures; wettable flanks guarantee solder joint integrity. |
| Automotive Digital Instrument Cluster | Industrial Vehicle Telematics Gateway |
|
Use Scenario: Provides 5V rail for TFT-LCD controller, microcontroller, and CAN transceivers in driver-facing instrument clusters. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting cold-crank (6.5V min) and load-dump (42V transient) events. Use Value: Low-dropout mode sustains 5V output during cranking dips; PG signal triggers cluster reboot only after stable regulation. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure MCU in fleet management gateways installed in truck cabins. IC Role / Device Role / Timing Role: Main 5V supply with long-term reliability across 15-year vehicle lifecycle and extended temperature storage. Use Value: AEC-Q100 qualification and RoHS/halogen-free compliance meet OEM Tier-1 sourcing mandates; MSL Level 1 enables standard SMT flow. |
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 | 3A output, 3.3V–36V input, same QFN-14 package but no FSS or PG pin; 30µA IQ in sleep mode. | Lacks power good signaling and spread-spectrum EMI reduction - unsuitable for safety-critical or noise-sensitive designs. | Select when cost sensitivity outweighs need for PG monitoring or CISPR25 compliance. |
| TPS62933QRVCRQ1 | 4A, 3V–36V, 5V fixed output, 1.5µA shutdown IQ, but only 125°C max TJ and no AEC-Q100 Grade 1 rating. | Not qualified for under-hood use; limited thermal margin in high-ambient environments like engine control units. | Choose for cabin-only applications where Grade 1 qualification is not mandated. |
Compared with MPQ4328GRE-5-AEC1-Z, MPQ4316GRE-AEC1-Z trades PG and FSS for lower cost and smaller footprint, while TPS62933QRVCRQ1 offers similar efficiency but lacks the 150°C junction rating and full AEC-Q100 Grade 1 validation required for harsh automotive locations.
Availability
MPQ4328GRE-5-AEC1-Z 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 traceability and long-lifecycle support.
Supply support for MPQ4328GRE-5-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 cloud computing markets.
The MPQ4328 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for demanding vehicle subsystems requiring AEC-Q100 qualification, ultra-low IQ, and robust EMI performance in space-constrained layouts.
FAQ
What is the purpose of the BIAS pin on MPQ4328GRE-5-AEC1-Z?
The BIAS pin accepts an external 5V supply-typically connected to VOUT-to power the internal gate drivers and control circuitry, reducing total input quiescent current from 24µA to 3µA. This significantly extends battery runtime in always-on automotive modules. Connecting BIAS before VIN is prohibited to avoid latch-up.
How does the MPQ4328GRE-5-AEC1-Z handle cold-crank conditions?
During cold-crank (VIN dip to ~5.5V), the device enters low-dropout mode, maintaining regulated 5V output with duty cycle up to 95%. This prevents brownout of downstream processors and sensors. The 50ns minimum on-time ensures stable operation even at high duty cycles.
Can the MPQ4328GRE-5-AEC1-Z be synchronized to an external clock?
Yes. Driving the SYNC/MODE pin with a 200kHz–2.5MHz external clock forces FCCM operation and synchronizes switching edges across multiple converters. Clock duty cycle must be 20–80%, and locking occurs within 128 switching cycles. This eliminates beat frequencies in multi-rail systems.
What is the significance of the wettable-flank QFN-14 package?
The wettable flanks allow automated optical inspection (AOI) of solder joints on the side walls of the package, improving process yield and field reliability in automotive manufacturing. It also enhances thermal conduction from the exposed pad to the PCB, lowering θJA by up to 21°C/W versus standard QFN.
Does the MPQ4328GRE-5-AEC1-Z require an external feedback resistor divider?
No. The "-5" suffix denotes a factory-trimmed fixed 5V output version. The FB pin is internally connected to the 0.8V reference, eliminating external resistors. This reduces BOM count, layout area, and potential drift from resistor tolerance or temperature coefficient.
How is over-current protection implemented?
OCP uses dual detection: valley current sensing on the LS-FET (4–6.8A limit) for hiccup-mode recovery during sustained overload, and cycle-by-cycle peak current limiting on the HS-FET (5.5–9.5A). Both thresholds are temperature-compensated and tested across −40°C to +150°C.
What EMC features does the MPQ4328GRE-5-AEC1-Z include?
It integrates frequency spread spectrum (FSS) modulation, symmetric VIN pinout, MeshConnect™ flip-chip packaging, and optimized gate drive slew rates - collectively enabling compliance with CISPR25 Class 5 radiated emissions without added ferrites or shielding, verified on standard 4-layer evaluation boards.
MPQ4328GRE-5-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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-5-AEC1-Z FAQ
1.How can I place an order for MPQ4328GRE-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4328GRE-5-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 MPQ4328GRE-5-AEC1-Z reliable?
The price and inventory of MPQ4328GRE-5-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 MPQ4328GRE-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4328GRE-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4328GRE-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4328GRE-5-AEC1-Z?
MPQ4328GRE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4328GRE-5-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 MPQ4328GRE-5-AEC1-Z?
For technical support, including MPQ4328GRE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4328GRE-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4328GRE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4328GRE-5-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 MPQ4328GRE-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4328GRE-5-AEC1-Z?
All MPQ4328GRE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4328GRE-5-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 MPQ4328GRE-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4328GRE-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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