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Monolithic Power Systems Inc. MPQ4323GDE-33-AEC1-Z
- Part No.:
- MPQ4323GDE-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-PowerVFQFN
- Datasheet:
-
MPQ4323GDE-33-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.3V 3A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,421
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Product details
Overview
MPQ4323GDE-33-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 3A continuous output at fixed 3.3V with 3.3V–36V input range, 42V load dump tolerance, and 1μA shutdown current. It integrates 70mΩ high-side and 50mΩ low-side MOSFETs in a wettable flank QFN-12 (2mm×3mm) package, targeting automotive infotainment and ADAS power rails.
For engineers reviewing the MPQ4323GDE-33-AEC1-Z datasheet, MPQ4323GDE-33-AEC1-Z pinout, MPQ4323GDE-33-AEC1-Z application, or MPQ4323GDE-33-AEC1-Z equivalent, key selection criteria include cold-crank support down to 3.1V VIN, ±1.5% VOUT accuracy over –40°C to +150°C, CISPR25 Class 5 EMI compliance, and frequency configurability from 350kHz to 2.5MHz via external resistor.
Technical Context
The MPQ4323 employs peak current mode control with programmable switching frequency (350kHz–2.5MHz), frequency foldback at startup, and Advanced Asynchronous Modulation (AAM) for light-load efficiency. Its integrated power stage features 65ns minimum on-time and 50ns minimum off-time, enabling high duty cycle operation during automotive cold-crank events.
Thermal management is enhanced by MeshConnect™ flip-chip packaging and symmetric VIN pinout for low-inductance layout. The device includes open-drain power good (PG) with 94.5%–105.5% output window detection, hiccup-mode over-current protection, and thermal shutdown at 160°C–185°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% over –40°C to +150°C - ensures stable MCU/SOC core rail under full automotive temperature stress. |
| Input Voltage Range | 3.3V to 36V, with 42V transient tolerance - supports ISO 16750-2 load dump immunity and cold-crank down to 3.1V. |
| Continuous Output Current | 3A - sufficient for powering automotive display controllers, camera modules, or radar SoCs without external heatsinking. |
| Quiescent Current | 20μA in sleep mode, 1μA in shutdown - extends battery life in always-on vehicle subsystems like telematics or door modules. |
| Switching Frequency | Configurable 350kHz–2.5MHz via FREQ pin resistor - enables optimization of size (higher fSW → smaller inductor) vs. efficiency (lower fSW → reduced switching loss). |
| EMI Performance | CISPR25 Class 5 compliant with spread-spectrum modulation - reduces radiated/conducted emissions without external filters in constrained automotive PCB layouts. |
| Package | QFN-12 (2mm×3mm) with wettable flanks - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles. |
Pinout & Package
MPQ4323GDE-33-AEC1-Z uses a 12-pin QFN-12 (2mm×3mm) wettable flank package with exposed thermal pad. Pin numbering follows standard top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 | PGND | Power ground return for high-current paths - must be connected to low-impedance ground plane beneath thermal pad. |
| 2, 10 | VIN | Main input supply (3.3V–36V) - dual pins reduce trace inductance and improve load dump energy handling. |
| 3 | BOOT | Bootstrap supply for high-side gate driver - requires ceramic capacitor (≥0.1μF) between BOOT and SW for reliable high-side turn-on. |
| 4 | FREQ | Switching frequency configuration - resistor to GND sets fSW (e.g., 86.6kΩ → 415kHz); enables EMI tuning and inductor size optimization. |
| 5 | VCC | Bias regulator output - powers internal logic/gate drivers; requires ≥1μF ceramic capacitor placed adjacent to pin. |
| 6 | AGND | Analog ground reference for feedback and regulation - must be star-connected to PGND at single point to avoid noise coupling. |
| 7 | FB | Feedback input - internally tied to 3.3V output; no external divider needed for fixed-output version. |
| 8 | PG | Open-drain power good - signals valid output (±5.5% window); requires external pull-up for system sequencing or fault monitoring. |
| 9 | EN | Enable control - active-high with 1.02V threshold; no internal pull-up; must be driven to avoid floating state. |
| 12 | SW | Switch node - connects high-side drain and low-side source; critical for layout; minimize loop area with input cap and inductor. |
Key Features
| Feature | Design Value |
|---|---|
| 42V Load Dump Tolerance | Survives ISO 16750-2 Pulse 5a transients without latch-up or degradation - eliminates need for upstream TVS in front-end power stages. |
| Low-Dropout (LDO) Mode | Maintains regulated 3.3V output down to VIN = 3.1V - sustains operation during engine cranking without brownout reset. |
| Wettable Flank Package | Side-wettable leads enable AOI verification of solder fillet integrity - meets automotive zero-defect assembly requirements. |
| Frequency Spread Spectrum (FSS) | ±10% modulation at 15kHz - spreads EMI energy across bandwidth, easing CISPR25 Class 5 compliance without added filtering. |
| Thermal Shutdown with Hysteresis | Triggers at 160°C–185°C with 20°C recovery gap - prevents thermal runaway while allowing safe restart after cooling. |
Applications
| Automotive Infotainment | Instrument Clusters |
|---|---|
|
Use Scenario: Powering LCD display controllers and audio DSPs in head units with wide input voltage swings during start-stop cycles. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic and interface I/O rails. Use Value: Maintains stable output during 3.1V cold crank and 42V load dump events, eliminating external protection components. |
Use Scenario: Supplying microcontroller, CAN transceiver, and TFT backlight drivers in digital instrument panels. IC Role / Device Role / Timing Role: High-reliability 3.3V power source with PG signal for system health monitoring and safe boot sequencing. Use Value: Wettable flank package ensures solder joint reliability over 15-year automotive service life; AEC-Q100 Grade 1 qualification guarantees operation to +150°C junction. |
| ADAS Camera Modules | Industrial Vehicle Telematics |
|
Use Scenario: Providing clean, low-noise 3.3V power to image sensors and ISP processors in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: EMI-optimized buck converter with CISPR25 Class 5 compliance to prevent RF interference with camera video signals. Use Value: Spread-spectrum modulation and symmetric VIN pinout suppress conducted/radiated emissions without ferrite beads or shielding cans. |
Use Scenario: Powering GPS/GNSS receivers, cellular modems, and secure boot MCUs in fleet management gateways operating in harsh mobile environments. IC Role / Device Role / Timing Role: Always-on 3.3V supply with 1μA shutdown current to extend backup battery runtime during vehicle dormancy. Use Value: Ultra-low IQ enables >1-year battery life in disconnected state; AEC-Q100 qualification ensures robustness against vibration and thermal cycling. |
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 |
|---|---|---|---|
| MPQ4323GDE-38-AEC1-Z | Fixed 3.8V output; identical package, pinout, and specs otherwise. | Targets 3.8V-powered AMOLED displays or specific sensor bias rails instead of 3.3V logic. | Select when system requires 3.8V rather than 3.3V; no design change beyond output capacitor value. |
| TPS62933RTER (TI) | 3A, 3.3V fixed, 3V–18V input, 1.8μA IQ, QFN-12 (2mm×2mm); lacks 42V load dump rating and AEC-Q100 Grade 1. | Suitable for non-automotive industrial or consumer applications where input voltage stays below 18V. | Use only in non-automotive contexts; cannot replace MPQ4323GDE-33-AEC1-Z in vehicles due to missing load dump tolerance and automotive qualification. |
Compared with MPQ4323GDE-33-AEC1-Z, the -38 variant offers identical automotive robustness at a different output voltage, while the TPS62933RTER trades automotive qualification and 42V tolerance for slightly lower quiescent current in non-automotive use cases.
Availability
MPQ4323GDE-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument clusters, and ADAS camera modules requiring stable component supply with full AEC-Q100 Grade 1 traceability and long-term lifecycle support.
Supply support for MPQ4323GDE-33-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 MPQ4323 product line delivers ultra-compact, AEC-Q100-qualified DC/DC converters optimized for automotive power rails demanding high reliability, low EMI, and extreme input voltage resilience.
FAQ
What is the maximum allowable input voltage for continuous operation?
The MPQ4323GDE-33-AEC1-Z supports continuous operation up to 36V input. It withstands 42V transients per ISO 16750-2 Load Dump Pulse 5a, but sustained voltage above 36V may trigger over-voltage protection (37.5V typical rising threshold) and shut down the device.
Does this part require an external feedback resistor network?
No. The MPQ4323GDE-33-AEC1-Z is the fixed 3.3V output variant; the FB pin is internally connected to the output, eliminating the need for external resistors. Only adjustable versions (e.g., MPQ4323GDE-AEC1-Z) require an external divider.
How is thermal performance affected by the QFN-12 (2mm×3mm) package?
This package achieves θJA = 60°C/W (JESD51-7, 4-layer board) and θJC = 7.3°C/W. With 3A load and 12V input, typical case rise is <30°C at 25°C ambient - enabling operation without heatsink in most automotive enclosures.
Can the PG pin be left unconnected if not used?
No. The PG pin is open-drain and must be either pulled up to a valid logic voltage (e.g., VCC or VIN) via a 10kΩ resistor or actively driven. Leaving it floating may cause undefined system behavior during power sequencing or fault conditions.
Is frequency spread spectrum (FSS) enabled by default?
Yes. FSS modulation is active by default at ±10% span and 15kHz rate when the FREQ pin is configured. Disabling FSS requires connecting FREQ directly to AGND, which fixes fSW at its minimum value (~350kHz) and disables modulation.
What is the minimum output capacitor requirement for stability?
MPS recommends ≥22μF total output capacitance using X5R/X7R ceramics. For the 3.3V fixed version, two 10μF/16V capacitors in parallel (22μF typical) provide optimal phase margin and transient response per the EVB design.
Does the device support forced PWM mode?
No. The MPQ4323 operates in automatic PFM/PWM transition mode (Advanced Asynchronous Modulation). Forced PWM is not supported; light-load efficiency is maintained via frequency scaling rather than fixed-frequency operation.
MPQ4323GDE-33-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-QFN (2x3)
MPQ4323GDE-33-AEC1-Z FAQ
1.How can I place an order for MPQ4323GDE-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4323GDE-33-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 MPQ4323GDE-33-AEC1-Z reliable?
The price and inventory of MPQ4323GDE-33-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 MPQ4323GDE-33-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4323GDE-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4323GDE-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4323GDE-33-AEC1-Z?
MPQ4323GDE-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4323GDE-33-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 MPQ4323GDE-33-AEC1-Z?
For technical support, including MPQ4323GDE-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4323GDE-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4323GDE-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4323GDE-33-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 MPQ4323GDE-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4323GDE-33-AEC1-Z?
All MPQ4323GDE-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4323GDE-33-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 MPQ4323GDE-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4323GDE-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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