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Monolithic Power Systems Inc. MPQ4323CGLE-AEC1-Z
- Part No.:
- MPQ4323CGLE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-PowerVFQFN
- Datasheet:
-
MPQ4323CGLE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,060
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Product details
Overview
MPQ4323CGLE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter with integrated 70mΩ high-side and 50mΩ low-side MOSFETs, delivering 3A continuous output current across a 3.3V–36V input range and surviving 42V automotive load dump transients. It supports configurable switching frequency (350kHz–2.5MHz), operates down to 3.1V during cold-crank, and features power-good signaling, frequency foldback, and thermal shutdown for automotive power rail regulation.
For engineers reviewing the MPQ4323CGLE-AEC1-Z datasheet, MPQ4323CGLE-AEC1-Z pinout, MPQ4323CGLE-AEC1-Z application, or MPQ4323CGLE-AEC1-Z equivalent, key selection considerations include its QFN-12 (3mm×4mm) wettable flank package, 1μA shutdown current, ±1.5% FB voltage accuracy over temperature, CISPR25 Class 5 EMI compliance, and low-dropout mode for automotive battery systems.
Technical Context
The MPQ4323CGLE-AEC1-Z implements peak current mode control with programmable frequency via external resistor on the FREQ pin, enabling optimization of efficiency vs. size trade-offs in space-constrained automotive modules. Its integrated power stage includes matched high- and low-side MOSFETs with 65ns minimum on-time and 50ns minimum off-time, supporting high duty cycle operation under cold-crank conditions.
It incorporates analog functions including a precision 0.8V reference (±1.5% over –40°C to +150°C), open-drain PG output with 94.5%–105.5% window detection, and hiccup-mode over-current protection triggered at 4.3A HS peak current and 3A LS valley current-ensuring robust fault handling in ADAS and infotainment power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V; supports full automotive battery range including cold-crank (3.1V min after start-up) |
| Output Current | 3A continuous; enables single-chip supply for multi-rail automotive subsystems without external boost stages |
| Switching Frequency | 350kHz to 2.5MHz; externally resistor-programmable for EMI tuning and inductor size reduction |
| FB Voltage Accuracy | ±1.5% over –40°C to +150°C; ensures stable output regulation across engine bay thermal extremes |
| Shutdown Current | 1μA typical; extends battery life in always-on vehicle modules such as telematics and alarm systems |
| Load Dump Tolerance | 42V per ISO16750; eliminates need for external TVS clamping in front-end DC/DC designs |
| Thermal Shutdown | 160°C to 185°C with 20°C hysteresis; prevents latch-up during sustained overload or poor PCB heatsinking |
Pinout & Package
MPQ4323CGLE-AEC1-Z uses a QFN-12 (3mm × 4mm) package with wettable flanks for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 11) | Input supply | Dual VIN pins reduce trace inductance and improve transient response; internally connected to power all control circuitry and switches |
| SW (Pin 12) | Switch node | Source of HS-FET / drain of LS-FET; requires low-inductance layout to minimize switching losses and EMI |
| BOOT (Pin 3) | Bootstrap supply | Drives HS-FET gate; requires 0.1µF ceramic capacitor between BOOT and SW for reliable high-side conduction |
| FREQ (Pin 4) | Frequency configuration | Resistor-to-ground sets fSW; enables precise EMI band placement and inductor selection (e.g., 86.6kΩ = 415kHz) |
| VCC (Pin 5) | Bias regulator output | Internal LDO supplies gate drivers and logic; requires ≥1µF ceramic decoupling close to pin for stability |
| AGND (Pin 6) | Analog ground | Reference for FB, PG, EN; must be routed separately from PGND to avoid noise coupling into feedback path |
| FB (Pin 7) | Feedback input | Senses output voltage divider; 0.8V reference enables adjustable VOUT from 0.8V up to 0.95×VIN |
| PG (Pin 8) | Power good indicator | Open-drain output asserts high when VOUT is within ±5.5% of nominal; requires external pull-up for system monitoring |
| EN (Pin 9) | Enable control | Logic-level input (0.85V threshold); no internal pull-up; must be actively driven to prevent unintended shutdown |
| PGND (Pins 2, 10) | Power ground | High-current return path for MOSFETs; connects directly to thermal pad for optimal heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| MeshConnect™ Flip-Chip Packaging | Reduces thermal resistance (θJC = 3.7°C/W) and improves power density for compact automotive modules |
| Frequency Spread Spectrum (FSS) | ±10% modulation at 15kHz reduces peak radiated emissions to meet CISPR25 Class 5 requirements |
| Low-Dropout Mode | Maintains regulation down to VIN = VOUT + 0.2V, critical for cold-crank operation in 12V systems |
| Forced Continuous Conduction Mode (FCCM) | Eliminates audible switching noise and ensures consistent EMI profile across load range |
| Hiccup Over-Current Protection | Auto-retry behavior limits power dissipation during short-circuit faults without latching off |
| Wettable Flank QFN | Enables AOI-compatible solder joint inspection for zero-defect manufacturing in automotive production |
Applications
| Automotive Infotainment | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering SoC, display, and audio subsystems in head units with wide input voltage variation and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic rails and memory interfaces. Use Value: 42V load dump tolerance eliminates external clamping diodes; CISPR25 Class 5 compliance avoids costly shielding. | Use Scenario: Supplying radar processors, camera ISPs, and sensor fusion MCUs in forward-facing ADAS modules. IC Role / Device Role / Timing Role: High-reliability point-of-load regulator with thermal shutdown and hiccup OCP for safety-critical power domains. Use Value: AEC-Q100 Grade 1 qualification and –40°C to +150°C operation ensure functional safety across ambient extremes. |
| Automotive Clusters | Industrial Power Systems |
Use Scenario: Driving TFT-LCD backlight drivers and microcontroller peripherals in digital instrument clusters exposed to engine vibration and thermal cycling. IC Role / Device Role / Timing Role: Main 3.3V/5V supply with low-dropout mode maintaining regulation during 3.1V cold-crank events. Use Value: 1μA shutdown current preserves battery charge during vehicle sleep mode; wettable flanks support automated assembly verification. | Use Scenario: Providing isolated auxiliary power in industrial gateways and telematics control units operating in harsh environments. IC Role / Device Role / Timing Role: Robust primary DC/DC stage tolerant to 42V surges from long cable runs or inductive loads. Use Value: Integrated 70mΩ/50mΩ MOSFETs reduce BOM count and board area versus discrete solutions while maintaining >95% efficiency at 2A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4323CGDE-AEC1-Z | Same die, QFN-12 (2mm×3mm) package; higher θJA (60°C/W) and lower power dissipation (3.5W) | Better suited for ultra-compact layouts where thermal margin allows reduced copper area | Select when footprint is constrained and thermal performance can be managed via PCB layout |
| MPQ4323CGRHE-AEC1-Z | Same die, QFN-14 (2.5mm×3.5mm) package; adds NC pins and slightly improved θJA (48.6°C/W) | Offers more routing flexibility and marginally better thermal performance than CGLE variant | Select when additional pin spacing or marginally lower junction temperature is required |
Compared with MPQ4323CGDE-AEC1-Z and MPQ4323CGRHE-AEC1-Z, the MPQ4323CGLE-AEC1-Z delivers the best balance of thermal performance (θJA = 50°C/W), manufacturability (wettable flanks), and PCB real estate (3mm×4mm), making it optimal for mid-density automotive modules requiring AOI and moderate power dissipation.
Availability
MPQ4323CGLE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, digital instrument clusters, and industrial telematics requiring stable component supply with AEC-Q100 qualification and full traceability.
Supply support for MPQ4323CGLE-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 consumer markets, with design centers in the US, China, and Taiwan.
The MPQ4323C product line delivers AEC-Q100 qualified synchronous buck converters optimized for automotive power rails-specifically engineered to survive load dump, cold-crank, and high-temperature engine bay environments while meeting stringent EMI standards.
FAQ
What is the maximum allowable input voltage for MPQ4323CGLE-AEC1-Z during load dump events?
The device is rated for 42V load dump per ISO16750, with absolute maximum VIN = +42V. This rating applies only during transient events-not continuous operation-and is validated under specified test conditions. The internal OVP triggers at 35.5V–40V rising threshold to protect downstream circuitry if the transient exceeds duration limits.
How does the frequency foldback feature operate during startup?
During soft-start, the MPQ4323CGLE-AEC1-Z automatically reduces switching frequency by ~30% to limit inductor current slew rate and prevent peak current overshoot. This foldback is internal and requires no external components-it deactivates once output regulation is achieved and normal frequency resumes.
Can the PG pin be left floating if not used in the system?
No-the PG pin must be left floating (unconnected) if unused. Connecting it to any voltage or pulling it high/low will disrupt internal comparator operation and may cause false power-good assertions or disable the function entirely. The open-drain structure requires external pull-up only when actively monitored.
What is the minimum recommended output capacitance for stable operation?
A minimum of 22µF total ceramic output capacitance is recommended (e.g., two 10µF X5R/X7R 0805 capacitors in parallel). Lower values risk instability under fast load transients; higher values improve ripple suppression but increase soft-start time and inrush current stress on input capacitors.
Does MPQ4323CGLE-AEC1-Z support fixed-output voltage versions?
Yes-fixed-output variants exist (e.g., MPQ4323CGLE-50-AEC1-Z for 5.0V), but MPQ4323CGLE-AEC1-Z is the adjustable version requiring external feedback resistors. Fixed versions integrate the top resistor and connect FB directly to VOUT, simplifying layout at the cost of output flexibility.
Is the QFN-12 (3mm×4mm) package RoHS and halogen-free compliant?
Yes-MPQ4323CGLE-AEC1-Z is fully lead-free, halogen-free, and compliant with EU RoHS Directive 2011/65/EU. MPS confirms green status on its official website under Quality Assurance documentation, with material declarations available upon request for automotive PPAP submissions.
What is the thermal resistance (θJA) of MPQ4323CGLE-AEC1-Z on a standard 4-layer evaluation board?
Measured per JESD51-7 on an 8.3cm×8.3cm, 2oz copper, 4-layer PCB, θJA = 50°C/W. This value is for comparative analysis only; actual system θJA depends on PCB copper area, thermal vias, and airflow. For design calculations, use θJC = 3.7°C/W (junction-to-case top) with proper heatsink or thermal pad attachment.
MPQ4323CGLE-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:
- 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:
- 3A
- Frequency - Switching:
- 350kHz ~ 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:
- 12-QFN (3x4)
MPQ4323CGLE-AEC1-Z FAQ
1.How can I place an order for MPQ4323CGLE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4323CGLE-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 MPQ4323CGLE-AEC1-Z reliable?
The price and inventory of MPQ4323CGLE-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 MPQ4323CGLE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4323CGLE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4323CGLE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4323CGLE-AEC1-Z?
MPQ4323CGLE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4323CGLE-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 MPQ4323CGLE-AEC1-Z?
For technical support, including MPQ4323CGLE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4323CGLE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4323CGLE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4323CGLE-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 MPQ4323CGLE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4323CGLE-AEC1-Z?
All MPQ4323CGLE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4323CGLE-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 MPQ4323CGLE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4323CGLE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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