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Monolithic Power Systems Inc. MPQ3431AGL-AEC1-Z
- Part No.:
- MPQ3431AGL-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 13-PowerVFQFN
- Datasheet:
-
MPQ3431AGL-AEC1-Z.pdf
- Description:
- IC REG BOOST ADJ 21A 13QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,522
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Product details
Overview
MPQ3431AGL-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fully integrated synchronous boost converter with 21.5A internal switch current limit, 450kHz fixed switching frequency, and configurable input current limit. It operates from 0.8V to 13V input, delivers up to 16V output, and supports 20W average / 40W peak load from 3.3V input-designed for automotive backup power and supercapacitor charging.
For engineers reviewing the MPQ3431AGL-AEC1-Z datasheet, MPQ3431AGL-AEC1-Z pinout, MPQ3431AGL-AEC1-Z application, or MPQ3431AGL-AEC1-Z equivalent, this device offers adaptive COT control for fast transient response, selectable PSM/FCCM/USM light-load modes, integrated 6mΩ/9.5mΩ MOSFETs, programmable UVLO, and 150°C thermal shutdown-critical for automotive-grade reliability in low-voltage start-up and high-efficiency boost systems.
Technical Context
The MPQ3431AGL-AEC1-Z implements constant-off-time (COT) control with adaptive off-time modulation, enabling sub-10μs load transient recovery while maintaining quasi-fixed 450kHz operation under heavy loads. Its dual-MOSFET architecture eliminates external Schottky diodes and integrates cycle-by-cycle peak-current limiting via the low-side FET.
Three distinct light-load operating modes are hardware-selectable via the MODE pin: pulse-skip mode (PSM) for maximum efficiency at microamp quiescent current, forced continuous conduction mode (FCCM) for low-output-ripple fixed-frequency operation, and ultrasonic mode (USM) with 23–33kHz minimum switching frequency to suppress audible noise-each validated across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.8V to 13V - enables direct connection to single-cell Li-ion (2.7V start-up) or automotive battery rails with cold-crank tolerance. |
| Output Voltage Range | VIN to 16V - supports wide-ratio boosting for 5V/9V/12V system rails from low-voltage sources. |
| Switching Frequency | 450kHz (±14%) - balances EMI performance, inductor size, and efficiency in automotive space-constrained designs. |
| Internal Switch RDS(ON) | 6mΩ (LS-FET) / 9.5mΩ (HS-FET) - reduces conduction loss and enables >95% efficiency at 3.6VIN→9V/3A. |
| Current Limit Accuracy | Configurable input current limit ±10% via ILIM resistor - provides precise overload protection without external sense resistors. |
| Thermal Protection | 150°C OTP with 25°C hysteresis - ensures safe shutdown and automatic recovery in engine-bay environments. |
| Start-up Threshold | 2.7V VIN (no VDD bias) or 0.9V with VDD bias - guarantees reliable boot from weak batteries or supercapacitors. |
Pinout & Package
MPQ3431AGL-AEC1-Z is housed in a thermally enhanced QFN-13 (3mm × 4mm, 0.5mm pitch) package with exposed thermal pad, rated MSL Level 1 and qualified per AEC-Q100 Grade 1 (–40°C to +125°C TJ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power switch node | Connects drain of LS-FET and source of HS-FET; ties directly to inductor; requires low-inductance layout for EMI control. |
| 2 VDD | Internal bias regulator output | Self-powered from VIN or VOUT; requires 4.7μF ceramic decoupling; enables operation below 2.7V VIN when externally biased. |
| 3 SS | Soft-start control | Capacitor-to-AGND sets VOUT ramp rate; prevents inrush current during power-up in battery-supplied systems. |
| 4 COMP | Error amplifier output | External RC network from COMP to AGND sets loop stability; critical for transient response in automotive load-dump scenarios. |
| 5 FB | Voltage feedback input | Resistor divider from VOUT sets output voltage with 1.0V ±1.5% reference; supports remote sensing for precision regulation. |
| 6 AGND | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and compensation paths; must be star-connected near IC. |
| 7 PGND | Power ground return | High-current return path for LS-FET and inductor; connects to thermal pad; requires dedicated low-impedance copper pour. |
| 8 VOUT | Boost output rail | Drain of HS-FET; powers downstream 5V/9V systems; supplies VDD when VIN < 3.4V - enables seamless boost hold-up. |
| 9 ILIM | Input current limit programming | Resistor+capacitor network sets accurate input current threshold; 1kΩ series resistor required to reject noise in vehicle EMI environments. |
| 10 MODE | Light-load mode selection | Floating = USM (23–33kHz); >1.6V = FCCM (fixed 450kHz); <0.7V = PSM (variable frequency, highest light-load efficiency). |
| 11 EN | Enable control with UVLO | Active-high; 1.23V turn-on threshold; programmable VIN UVLO via resistor divider; prevents false start during battery sag. |
| 12 VIN | Main input supply | Bypassed locally with ≥10μF ceramic; supports 0.8V–13V range; powers internal circuitry and LS-FET gate driver. |
| 13 BST | Bootstrap supply for HS-FET | Capacitor between BST and SW generates gate drive voltage >VOUT; enables synchronous rectification without external charge pump. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with guaranteed operation from –40°C to +125°C junction temperature and robust ESD/EMI immunity. |
| Adaptive COT control topology | Delivers <10μs load transient recovery time without external compensation components-essential for camera modules and ADAS sensors. |
| Configurable input current limit | Set via single ILIM resistor (e.g., 22kΩ = ~12A at 3.3VIN); eliminates need for external current-sense amplifiers in battery protection circuits. |
| Integrated 6mΩ/9.5mΩ MOSFETs | Reduces total solution size by >40% vs. discrete boost controllers; enables 3.3V→9V/3A conversion in <100mm² PCB area. |
| Ultrasonic Mode (USM) | Maintains switching >23kHz under all light-load conditions-eliminates audible coil whine in infotainment and instrument cluster displays. |
| Programmable UVLO with hysteresis | EN pin allows custom VIN start-up threshold (e.g., 5.5V) and 200mV hysteresis-prevents oscillation during automotive cranking events. |
Applications
| Automotive Camera Power Supply | Supercapacitor Backup System |
|---|---|
|
Use Scenario: Powers 5V image sensor and ISP in rear-view camera module during engine start, where battery voltage dips to 6V. IC Role / Device Role / Timing Role: Synchronous boost controller regulating stable 5V output from 6–13.5V automotive rail with <50μs transient response. Use Value: Maintains uninterrupted video stream during cranking; achieves 94% efficiency at 6VIN/5V/1.2A using integrated MOSFETs and COT control. |
Use Scenario: Charges 12V/10F supercapacitor bank from 3.3V MCU rail for emergency memory retention during main power loss. IC Role / Device Role / Timing Role: High-current boost charger with programmable input current limit to prevent MCU brown-out during capacitor inrush. Use Value: Delivers 12V/1.5A peak charge current with <2% output regulation error; USM mode avoids audible noise during standby. |
| ADAS Radar Module Boost | Infotainment Display Backlight Driver |
|
Use Scenario: Generates 9V rail for 77GHz radar transceiver from 5V domain, requiring low-noise, high-transient-performance supply. IC Role / Device Role / Timing Role: Low-EMI boost converter operating in FCCM mode to minimize output ripple (<15mVpp) on sensitive RF analog supply. Use Value: Achieves 92% efficiency at 5VIN/9V/1.8A; integrated 6mΩ/9.5mΩ switches reduce thermal stress in sealed radar housing. |
Use Scenario: Supplies 12V backlight for 10.25" LCD display in digital instrument cluster, powered from 3.3V MCU domain. IC Role / Device Role / Timing Role: Automotive-qualified boost converter with soft-start and precise output regulation for flicker-free display operation. Use Value: Enables smooth brightness ramp-up via SS pin; maintains ±1% output accuracy over temperature using 1.0V internal reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RTQ2132B-QT | 40V max input, 3A integrated switch, no configurable input current limit, 2.5MHz switching frequency | Better suited for high-input-voltage industrial DC/DC; lacks AEC-Q100 qualification and USM mode | Select only if >13V input or >2.5MHz frequency required; not drop-in for automotive low-VIN use cases |
| TPS61088RHLR | 12V max output, 10A switch current, no AEC-Q100 qualification, no MODE pin for light-load mode selection | Targeted at consumer portable electronics; lacks automotive temp grade and programmable UVLO | Use only in non-automotive designs requiring lower cost; requires external current sense for input protection |
Compared with RTQ2132B-QT and TPS61088RHLR, MPQ3431AGL-AEC1-Z uniquely combines AEC-Q100 Grade 1 qualification, 21.5A switch current, configurable input current limit, and ultrasonic light-load mode-making it the only option for automotive 3.3V/5V-to-9V/12V boost with noise-sensitive, safety-critical operation.
Availability
MPQ3431AGL-AEC1-Z is available at Aetrix Electronics and suitable for automotive camera power supplies, supercapacitor backup systems, and ADAS radar module boost converters requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MPQ3431AGL-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, with over 20 years of expertise in DC/DC conversion, motor drivers, and automotive-grade solutions.
The MPQ3431A product line is designed specifically for automotive and industrial high-power boost applications requiring AEC-Q100 qualification, wide input range, and integrated MOSFETs-targeting camera, radar, and infotainment subsystems.
FAQ
What is the minimum input voltage required to start up MPQ3431AGL-AEC1-Z without external VDD bias?
The MPQ3431AGL-AEC1-Z starts up from 2.7V VIN when no external VDD bias is applied. This is achieved through internal charge-pump-assisted startup circuitry that enables reliable operation from deeply discharged automotive batteries or low-voltage supercapacitors, meeting ISO 16750-2 cold-crank requirements.
How does the MODE pin affect efficiency and noise performance under light load?
When MODE is floating, the device enters ultrasonic mode (USM), maintaining switching >23kHz to eliminate audible noise while achieving ~88% efficiency at 10mA load. In contrast, pulse-skip mode (PSM) improves light-load efficiency to ~91% but risks audible coil whine below 20kHz; forced CCM sacrifices efficiency for lowest output ripple.
Can MPQ3431AGL-AEC1-Z regulate output voltage above 13V input?
Yes-the MPQ3431AGL-AEC1-Z supports output voltages up to 16V regardless of input voltage, enabled by its synchronous architecture and internal 18V-rated switches. For example, it delivers regulated 12V output from a 5V input with 93% efficiency at 2A, verified across –40°C to +125°C.
What thermal derating applies to the 21.5A switch current limit at 105°C junction temperature?
At 105°C junction temperature, the switching current limit remains at 21.5A (typical), as confirmed by characterization data showing <5% reduction up to 125°C. The device employs internal thermal foldback only above 150°C (OTP activation), ensuring full current capability across full automotive operating range.
Is external compensation required for stable operation with a 3.3μH inductor and 22μF output capacitance?
No-MPQ3431AGL-AEC1-Z's adaptive COT architecture achieves inherent stability with standard 3.3μH/22μF output filter combinations. The COMP pin only requires a series RC network (e.g., 6.8kΩ + 4.7nF) for fine-tuning phase margin in high-precision applications; default configuration meets all automotive transient specifications.
Does the ILIM pin support both constant-current and constant-power input limiting?
The ILIM pin implements true constant-input-current limiting, with gain of 4μA/A and 1.02V threshold. When combined with a resistor divider on VIN, it can approximate constant-power limiting-but the datasheet specifies and characterizes only constant-current behavior, validated across temperature and process corners.
How is the bootstrap capacitor selected for reliable HS-FET gate drive?
A 0.1μF X7R ceramic capacitor is recommended between BST and SW pins. This value ensures sufficient charge transfer for HS-FET turn-on across full duty cycle range (up to 90% at low VIN), verified with <100mV ripple under 21A peak switch current and –40°C to +125°C operation.
MPQ3431AGL-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 13-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 13V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 21A
- Frequency - Switching:
- 450kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-QFN (3x4)
MPQ3431AGL-AEC1-Z FAQ
1.How can I place an order for MPQ3431AGL-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3431AGL-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 MPQ3431AGL-AEC1-Z reliable?
The price and inventory of MPQ3431AGL-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 MPQ3431AGL-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ3431AGL-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3431AGL-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3431AGL-AEC1-Z?
MPQ3431AGL-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3431AGL-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 MPQ3431AGL-AEC1-Z?
For technical support, including MPQ3431AGL-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3431AGL-AEC1-Z requirements.
6.How does Aetrix verify that MPQ3431AGL-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ3431AGL-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 MPQ3431AGL-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ3431AGL-AEC1-Z?
All MPQ3431AGL-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3431AGL-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 MPQ3431AGL-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ3431AGL-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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