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Monolithic Power Systems Inc. MPQ4431GLE-5-AEC1-Z
- Part No.:
- MPQ4431GLE-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ4431GLE-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,401
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Product details
Overview
MPQ4431GLE-5-AEC1-Z from Monolithic Power Systems is a 36V, 1A synchronous step-down DC/DC converter with AEC-Q100 Grade-1 qualification, integrated 90mΩ high-side and 80mΩ low-side MOSFETs, fixed 5V output, and programmable 350kHz–2.5MHz switching frequency. It delivers high efficiency across automotive cold-crank (low-dropout mode), battery-powered infotainment systems, and ADAS domain controllers requiring ultra-low quiescent current (10µA sleep mode) and robust EMI performance meeting CISPR 25 Class 5.
For engineers reviewing the MPQ4431GLE-5-AEC1-Z datasheet, MPQ4431GLE-5-AEC1-Z pinout, MPQ4431GLE-5-AEC1-Z application, or MPQ4431GLE-5-AEC1-Z equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 automotive operating range (−40°C to +125°C), exact QFN-16 (3mm×4mm) wettable flank package mapping, and real-world EMI compliance data per CISPR 25 Class 5 radiated/ conducted limits.
Technical Context
The MPQ4431GLE-5-AEC1-Z implements current-mode PWM control with valley-current over-current protection and hiccup-mode short-circuit response. Its internal error amplifier compares feedback against a precision 800mV reference, driving a COMP node that directly modulates high-side MOSFET on-time via peak-current sensing.
It supports dual operating modes: forced continuous conduction mode (CCM) for stable ripple and predictable EMI when SYNC is pulled high pre-startup, and advanced asynchronous mode (AAM) for light-load efficiency-scaling switching frequency down to ~100kHz while maintaining regulation at <1mA load with only 10µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (4.5V) and load-dump (36V) transients without external protection. |
| Output Voltage | Fixed 5.0V ±2% - eliminates external resistor divider, reduces BOM count, and ensures stable USB-peripheral or MCU core rail supply. |
| Continuous Output Current | 1A - sufficient for powering dual-core microcontrollers, CAN transceivers, and sensor signal chains in compact ECUs. |
| Quiescent Current | 10µA in sleep mode - enables >1-year battery standby in always-on telematics modules with wake-on-CAN capability. |
| Switching Frequency | Programmable 350kHz–2.5MHz - allows optimization between inductor size (higher fSW → smaller L) and efficiency (lower fSW → reduced switching loss). |
| Thermal Shutdown | 170°C with 20°C hysteresis - prevents thermal runaway during sustained overload or poor PCB heatsinking in sealed enclosures. |
| EMI Compliance | CISPR 25 Class 5 radiated/conducted - validated with standard EMI filter per Figure 17, enabling direct integration into Tier-1 automotive modules without additional shielding. |
Pinout & Package
MPQ4431GLE-5-AEC1-Z is housed in a thermally enhanced QFN-16 (3mm × 4mm) package with wettable flanks for automated optical solder-joint inspection. The exposed thermal pad (Pin 13 AGND) must be soldered to a dedicated PCB thermal plane with ≥4 thermal vias for reliable 125°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Drives high for in-phase sync with external clock; low for 180° out-of-phase - critical for multi-phase interleaving in high-current systems. |
| 2 VIN | Main power input | Accepts 3.3–36V; requires local 10µF ceramic decoupling to suppress high-frequency switching noise on vehicle battery rail. |
| 3,10 SW | Power switch node | Internally connected high-side drain / low-side source node; drives external inductor; layout demands minimal loop area to reduce EMI. |
| 4,9 PGND | Power ground return | Separate from AGND; must connect to thermal pad and high-current return path - improper separation causes OCP false triggering. |
| 5 EN | Enable control | Active-high logic input (0.9–1.2V threshold); used for system-level power sequencing and fail-safe shutdown in ASIL-B designs. |
| 6 SYNC | Frequency synchronization & mode select | Configures CCM/AAM pre-startup; accepts 350kHz–2.5MHz external clock - enables EMI spread-spectrum alignment in multi-rail systems. |
| 7 PG | Power-good open-drain flag | Asserts high when VOUT is within ±10% of 5V; drives external MCU reset or status LED - no pull-up required if unused. |
| 8 BIAS | External bias supply input | Accepts 5–18V external rail (e.g., VOUT) to reduce internal regulator loss - improves full-load efficiency by up to 3% at 12VIN. |
| 11 BST | Bootstrap supply | Requires 0.1µF X7R ceramic capacitor to SW; enables high-side gate drive above VIN - critical for >90% duty cycle during cold-crank. |
| 12 VCC | Internal regulator output | Supplies 5V to control circuitry; requires ≥1µF ceramic decoupling - floating VCC causes startup failure. |
| 13 AGND | Analog ground reference | Reference for FB, SS, and error amplifier; must tie to PGND only at single point near thermal pad to avoid noise coupling. |
| 14 SS | Soft-start timing | 10µA current source charges external capacitor; sets ramp time for controlled inrush - prevents input voltage sag during ECU power-up. |
| 15 FB/VOUT | Feedback or fixed-output node | In fixed-5V version, connects directly to output; no external resistors needed - eliminates drift and tolerance errors in safety-critical rails. |
| 16 FREQ | Frequency programming | Resistor-to-ground sets switching frequency (e.g., 180kΩ = 475kHz); enables precise EMI notch placement in narrowband RF environments. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-16 | Enables AOI-compatible solder-joint inspection for zero-defect automotive manufacturing - required for IATF 16949 PPAP submissions. |
| AEC-Q100 Grade-1 qualification | Validated for −40°C to +125°C ambient operation with lifetime reliability testing - meets functional safety requirements for ASIL-B system power rails. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 10µA while maintaining regulation - extends battery life in parked vehicle monitoring systems beyond ISO 16750-2 limits. |
| Low dropout mode | Maintains 5V output down to VIN = 5.5V - sustains operation during 6V cold-crank events without brownout in engine control modules. |
| Valley-current OCP with hiccup | Detects inductor current at zero-crossing to prevent saturation; enters low-duty-cycle hiccup on short-circuit - protects external FETs and inductors during fault conditions. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in 12V vehicle head units with start-stop capability. IC Role / Device Role / Timing Role: Primary 5V system rail regulator with cold-crank support and low-noise operation for analog audio paths. Use Value: Maintains uninterrupted operation during 6V battery dips; 10µA sleep current enables always-on voice wake-up without draining 12V battery. |
Use Scenario: Supplies clean 5V to image sensor, ISP, and MIPI serializer in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Fixed-output buck converter with CISPR 25 Class 5 EMI compliance to avoid interference with camera video signals. Use Value: Eliminates need for external EMI filters; wettable flank package ensures solder-joint reliability in high-vibration camera housings. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Sub-Rail |
|
Use Scenario: Provides regulated 5V for LTE modem, GNSS receiver, and secure element in cellular-connected TCUs. IC Role / Device Role / Timing Role: High-efficiency, low-IQ DC/DC with programmable frequency to avoid LTE band interference (700–2600MHz). Use Value: 350kHz–2.5MHz frequency tuning places switching harmonics outside critical RF bands; AAM extends GPS tracking battery life. |
Use Scenario: Generates 5V sub-rail for door module MCUs, LIN transceivers, and LED drivers in centralized BCM architectures. IC Role / Device Role / Timing Role: Robust step-down regulator with integrated MOSFETs and thermal shutdown for unregulated 12V battery input. Use Value: Integrated 90mΩ/80mΩ FETs eliminate external discrete components; 170°C thermal shutdown prevents latch-up during under-hood thermal stress. |
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 3.5A rating, 4.2V–36V input, but 25µA quiescent current (2.5× higher than MPQ4431's 10µA) | Better suited for high-current clusters; less optimal for ultra-low-power always-on modules | Select when >1A load or tighter input UVLO (4.2V vs. 2.8V) is required; avoid if battery life is primary constraint. |
| TPS62903-Q1 | Lower 3A rating, 3V–18V input, 2.5µA quiescent current, but no AEC-Q100 Grade-1 rating (only Grade-2) | Valid for cabin interior modules; not qualified for engine bay or safety-critical domains | Choose for cost-sensitive non-safety applications below 125°C ambient; reject for powertrain or ADAS use cases. |
Compared with LM61480-Q1 and TPS62903-Q1, MPQ4431GLE-5-AEC1-Z uniquely balances AEC-Q100 Grade-1 qualification, 10µA sleep current, fixed 5V output, and CISPR 25 Class 5 EMI compliance - making it the only option qualified for ASIL-B-compliant 5V rails in thermally demanding, battery-sensitive automotive domains.
Availability
MPQ4431GLE-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, telematics control units, and body control modules requiring stable component supply with full AEC-Q100 traceability and PPAP documentation.
Supply support for MPQ4431GLE-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4431 product line targets automotive-grade DC/DC conversion with emphasis on AEC-Q100 reliability, ultra-low quiescent current, and EMI-hardened operation - specifically engineered for next-generation E/E architectures requiring functional safety and extended battery life.
FAQ
What is the minimum input voltage required for regulation at full 1A load?
The MPQ4431GLE-5-AEC1-Z maintains 5V regulation down to VIN = 5.5V at 1A due to its low-dropout mode, which bypasses the high-side FET and operates in 100% duty cycle - essential for sustaining operation during automotive cold-crank events where battery voltage drops to 6V.
Does the fixed 5V version require external feedback resistors?
No. The MPQ4431GLE-5-AEC1-Z integrates the feedback divider internally; Pin 15 (FB/VOUT) connects directly to the output node. This eliminates resistor tolerance errors and temperature drift, ensuring ±2% output accuracy across −40°C to +125°C without external components.
How does the wettable flank feature impact manufacturing yield?
The wettable flank design enables automated optical inspection (AOI) of solder joints on all 16 perimeter pins, improving defect detection rate by >95% compared to standard QFN. This directly supports zero-defect goals in automotive SMT lines and reduces field failure risk in vibration-prone applications like ADAS cameras.
Can the SYNC pin be used for both frequency synchronization and mode selection simultaneously?
No. SYNC must be configured *before* startup: driven high (>1.8V) for forced CCM, or low/floating (<0.4V) for AAM. Once operational, SYNC accepts external clock input for synchronization - but mode cannot be changed dynamically during runtime without cycling EN.
What is the thermal resistance θJA under standard JEDEC JESD51-7 4-layer board conditions?
The datasheet specifies θJA = 48°C/W for the QFN-16 (3mm×4mm) package on a 4-layer JEDEC-standard PCB. Achieving this requires the exposed thermal pad to be soldered to a solid copper plane with ≥4 thermal vias - insufficient thermal relief increases junction temperature by up to 35°C at 1A load.
Is the 5V output tolerant to reverse current during load dump?
Yes. The MPQ4431GLE-5-AEC1-Z includes reverse-current protection with a 1.5A limit, preventing backfeed from the output into the IC during load-dump transients or when multiple regulators share a common rail - protecting downstream components and avoiding latch-up.
How is power-good (PG) assertion timed relative to output regulation?
PG asserts high after VOUT reaches 90% of 5V (4.5V) and remains stable for 30µs (deglitch timer). It deasserts when VOUT falls below 84% (4.2V) for 50µs - providing noise-immune sequencing for MCU reset or FPGA configuration without external RC delays.
MPQ4431GLE-5-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-VQFN
- 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:
- 1A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-QFN (3x4)
MPQ4431GLE-5-AEC1-Z FAQ
1.How can I place an order for MPQ4431GLE-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4431GLE-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 MPQ4431GLE-5-AEC1-Z reliable?
The price and inventory of MPQ4431GLE-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 MPQ4431GLE-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4431GLE-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4431GLE-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4431GLE-5-AEC1-Z?
MPQ4431GLE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4431GLE-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 MPQ4431GLE-5-AEC1-Z?
For technical support, including MPQ4431GLE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4431GLE-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4431GLE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4431GLE-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 MPQ4431GLE-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4431GLE-5-AEC1-Z?
All MPQ4431GLE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4431GLE-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 MPQ4431GLE-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4431GLE-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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