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Monolithic Power Systems Inc. MPQ4431GLE-33-AEC1-P
- Part No.:
- MPQ4431GLE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ4431GLE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,128
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Product details
Overview
MPQ4431GLE-33-AEC1-P from Monolithic Power Systems is a 36V, 1A synchronous step-down DC/DC converter with fixed 3.3V output, AEC-Q100 Grade-1 qualification, integrated 90mΩ high-side and 80mΩ low-side MOSFETs, and programmable switching frequency (350kHz–2.5MHz). It delivers high efficiency in automotive cold-crank and battery-powered systems via advanced asynchronous mode (AAM), low dropout operation, and 10μA sleep-mode quiescent current.
For engineers reviewing the MPQ4431GLE-33-AEC1-P datasheet, MPQ4431GLE-33-AEC1-P pinout, MPQ4431GLE-33-AEC1-P application, or MPQ4431GLE-33-AEC1-P equivalent, key selection criteria include its AEC-Q100 qualification for automotive power rails, wettable flank QFN-16 package for solder joint inspection, 3.3V fixed output with ±1.5% reference accuracy, and support for external clock synchronization with phase selection (in-phase or 180° out-of-phase).
Technical Context
The MPQ4431GLE-33-AEC1-P employs current-mode control with valley-current over-current protection and hiccup-mode fault recovery. Its internal error amplifier compares the 0.8V reference against FB (shorted to VOUT in fixed-output configuration) and drives a COMP node that modulates PWM duty cycle via peak-current sensing.
It supports dual operating modes: forced continuous conduction mode (CCM) when SYNC is pulled high before startup, and advanced asynchronous mode (AAM) when SYNC is low/floating-enabling dynamic frequency scaling down to ~20kHz at light load to minimize gate-driving and switching losses while maintaining <10μA IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (down to 3.3V) and load-dump transients up to 40V absolute max. |
| Output Voltage | Fixed 3.3V ±1.5% - internally trimmed; eliminates external resistor divider and improves stability in noise-sensitive automotive domains. |
| Continuous Output Current | 1A - sustained delivery with thermal shutdown at 170°C and 20°C hysteresis ensures robust operation under sustained load in enclosed ECUs. |
| Quiescent Current | 10μA in sleep mode - enables >1-year battery standby in always-on vehicle modules (e.g., telematics, CAN gateway, sensor nodes). |
| Switching Frequency | 350kHz to 2.5MHz - programmable via FREQ pin resistor; allows EMI optimization and inductor size reduction without compromising transient response. |
| Protection Features | OCP (valley-current detection), thermal shutdown, UVLO (2.8V rising threshold), PG indicator, and low-dropout mode - provides fault resilience across automotive mission profiles. |
| Package | QFN-16 (3mm × 4mm) with wettable flanks - supports automated optical inspection (AOI) of solder joints per IPC-A-610 Class 3 requirements. |
Pinout & Package
MPQ4431GLE-33-AEC1-P is housed in a thermally enhanced, lead-free, wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad. The package supports high-power density layout and meets AEC-Q100 mechanical stress requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Logic-level input to configure SYNC output alignment: high = in-phase, low = 180° out-of-phase; tie to GND if unused. |
| 2 VIN | Main input supply | Accepts 3.3V–36V; requires local 10µF ceramic decoupling close to pin to suppress switching noise and ensure stable control loop operation. |
| 3,10 SW | Power switch node | Internally connected high-side/low-side MOSFET drain node; routes high di/dt current; must be routed with minimal loop area and adjacent to PGND pour. |
| 4,9 PGND | Power ground return | High-current return path for MOSFETs; requires dedicated copper pour with multiple vias to inner-layer ground plane to minimize voltage bounce. |
| 5 EN | Enable control | Active-high logic input (0.9V–1.2V threshold); enables soft-start sequence and disables all switching when pulled low. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz external clock; also selects CCM (high pre-startup) or AAM (low/floating pre-startup) - critical for EMI and light-load efficiency tuning. |
| 7 PG | Power good open-drain output | Asserts high when VOUT is within ±10% of 3.3V; used for system power sequencing and fault monitoring in ASIL-B designs. |
| 8 BIAS | External bias supply input | Optional 5V–18V supply to reduce internal regulator loss; improves efficiency by >2% at 12V input and enables lower thermal rise in compact layouts. |
| 11 BST | Bootstrap supply | Connects to SW via 0.1µF ceramic capacitor; provides gate drive voltage for high-side MOSFET; layout must minimize BST-SW loop inductance. |
| 12 VCC | Internal bias rail | 5V regulated output powering control circuitry; requires ≥1µF ceramic decoupling to GND; sensitive to ripple affecting loop stability. |
| 13 AGND | Analog ground reference | Separate low-noise ground for feedback and error amplifier; must be star-connected to PGND at single point to avoid noise coupling into regulation loop. |
| 14 SS | Soft-start timing | Capacitor-to-GND sets ramp time; internal 0.7ms default if floating; prevents inrush current during cold start in battery-fed systems. |
| 15 FB/VOUT | Feedback or fixed output | In fixed-output version, directly connects to regulated 3.3V output; no external divider needed - simplifies layout and improves PSRR. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets switching frequency: 180kΩ = 475kHz, 82kΩ = 1MHz, 27kΩ = 2.5MHz - enables EMI compliance across CISPR-25 bands. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Rated for −40°C to +125°C junction temperature with full automotive reliability testing (HTOL, TC, UHAST), enabling use in engine bay and ADAS ECU power supplies. |
| Advanced Asynchronous Mode (AAM) | Dynamically scales switching frequency below 100kHz at light load, reducing total power loss by >40% vs. fixed-frequency CCM while maintaining <10μA IQ. |
| Wettable flank QFN-16 package | Enables automated X-ray and AOI verification of solder fillet integrity - critical for zero-defect manufacturing in automotive Tier-1 production lines. |
| Low dropout mode | Maintains regulation down to VIN = VOUT + 0.3V (e.g., 3.6V input for 3.3V output), supporting start-stop battery operation without brownout in 12V systems. |
| Integrated power-good (PG) indicator | Open-drain output with 30µs deglitch timer confirms stable 3.3V rail within ±10%; interfaces directly with microcontroller reset or safety monitor circuits. |
Applications
| Automotive Infotainment Power Rail | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and display interface in head-unit systems with wide input voltage swings during engine cranking and alternator load dump. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering 1A with AEC-Q100 qualification, low IQ, and fast line/load transient response (<50µs). Use Value: Eliminates need for external LDO post-regulation; maintains clean 3.3V rail during 6V–16V battery transients while consuming <10μA in sleep mode during ignition-off. |
Use Scenario: Supplies image sensor, ISP, and SerDes in rear-view or surround-view camera modules mounted in exterior housings. IC Role / Device Role / Timing Role: Fixed 3.3V point-of-load regulator with wettable flank package for IPC-A-610-compliant assembly and thermal shutdown for sealed enclosure operation. Use Value: Delivers stable 3.3V at −40°C to +105°C ambient with <1.5% output tolerance, enabling consistent sensor performance and eliminating calibration drift due to rail variation. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Microcontroller Core |
|
Use Scenario: Powers LTE modem, GNSS receiver, and MCU in always-connected vehicle tracking units with multi-year battery backup requirement. IC Role / Device Role / Timing Role: High-efficiency 3.3V buck with 10μA sleep current and programmable soft-start for controlled wake-up from deep-sleep states. Use Value: Extends primary Li-ion battery life beyond 18 months in low-duty-cycle applications by minimizing quiescent loss while retaining fast wake-up capability. |
Use Scenario: Supplies 3.3V core rail to 32-bit ARM Cortex-M microcontroller in centralized body electronics managing door locks, lighting, and HVAC. IC Role / Device Role / Timing Role: Automotive-grade synchronous buck with PG signal for safe MCU boot sequencing and OCP with hiccup mode for short-circuit resilience. Use Value: Ensures deterministic power-up timing and fault containment during wiring harness shorts, meeting ISO 16750-2 pulse test requirements for load dump immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543320RTWR | 4.5V–18V input, 3A output, 2.2MHz fixed frequency, no AAM, higher IQ (25μA) | Lacks AEC-Q100 qualification and automotive temperature range; suitable for industrial but not automotive front-end rails. | Select only if higher current (>1A) and smaller inductor size are prioritized over automotive qualification and ultra-low IQ. |
| LM61480QRNLRQ1 | 3V–36V input, 8A output, 2.1MHz max, spread-spectrum EMI reduction, 15μA IQ | Higher current rating and integrated EMI filters increase solution size/cost; no wettable flank option in QFN package. | Prefer when system requires >1A or stricter CISPR-25 Class 5 radiated emissions compliance without external filters. |
Compared with TPS543320RTWR and LM61480QRNLRQ1, MPQ4431GLE-33-AEC1-P uniquely combines AEC-Q100 Grade-1, wettable flank QFN, 10μA sleep IQ, and fixed 3.3V output in a 1A solution-making it optimal for space-constrained, battery-sensitive automotive modules where qualification and manufacturability are non-negotiable.
Availability
MPQ4431GLE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MPQ4431GLE-33-AEC1-P 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 power conversion with AEC-Q100 qualification, low quiescent current, and robust protection features-designed specifically for demanding 12V/24V vehicle subsystems where reliability, thermal performance, and EMI control are critical.
FAQ
What is the maximum allowable input voltage for MPQ4431GLE-33-AEC1-P?
The absolute maximum input voltage is 40V, but the recommended operating range is 3.3V to 36V. Operation above 36V risks exceeding the 40V absolute maximum rating during transients like load dump, potentially triggering overvoltage protection or causing permanent damage if sustained.
Does MPQ4431GLE-33-AEC1-P require an external feedback resistor divider?
No. This part has a fixed 3.3V output; the FB pin is internally connected to the output stage. External resistors are unnecessary, reducing BOM count and improving regulation accuracy by eliminating divider tolerance and PCB leakage effects.
How does the wettable flank feature benefit automotive manufacturing?
The wettable flank enables automated optical inspection (AOI) of solder fillet height and contour on all 16 side pins, satisfying IPC-A-610 Class 3 requirements for automotive electronics. This reduces reliance on X-ray inspection and improves first-pass yield in high-volume SMT lines.
Can MPQ4431GLE-33-AEC1-P operate with a 5V input?
Yes. With a minimum input of 3.3V, it supports 5V inputs such as USB PD or auxiliary 5V rails. In low-dropout mode, it maintains regulation even when VIN drops to 3.6V, making it suitable for backup power paths in dual-supply systems.
What is the purpose of the BIAS pin, and when should it be used?
The BIAS pin accepts an external 5V–18V supply to power the internal regulator, bypassing VIN-derived regulation. Use it when VOUT (3.3V) or another stable rail is available - it reduces thermal dissipation by ~300mW at 12V input and improves efficiency by 1.8% to 2.5%.
Is MPQ4431GLE-33-AEC1-P compatible with external clock synchronization?
Yes. The SYNC pin accepts 350kHz–2.5MHz external clocks and supports phase alignment selection (in-phase or 180° out-of-phase via PHASE pin). This enables EMI reduction through frequency dithering and synchronization with other converters in multi-rail systems.
What failure protections are implemented in this device?
It integrates valley-current over-current protection with hiccup mode, thermal shutdown (170°C, 20°C hysteresis), input UVLO (2.8V rising), power-good monitoring, and reverse-current blocking. These meet ISO 26262 functional safety requirements for ASIL-B power supply monitoring.
MPQ4431GLE-33-AEC1-P 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):
- 3.3V
- 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-33-AEC1-P FAQ
1.How can I place an order for MPQ4431GLE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4431GLE-33-AEC1-P 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-33-AEC1-P reliable?
The price and inventory of MPQ4431GLE-33-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4431GLE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4431GLE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4431GLE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4431GLE-33-AEC1-P?
MPQ4431GLE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4431GLE-33-AEC1-P 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-33-AEC1-P?
For technical support, including MPQ4431GLE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4431GLE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ4431GLE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4431GLE-33-AEC1-P 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-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4431GLE-33-AEC1-P?
All MPQ4431GLE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4431GLE-33-AEC1-P, 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-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4431GLE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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