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Monolithic Power Systems Inc. MPQ4431GLE-5-AEC1-P
- Part No.:
- MPQ4431GLE-5-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ4431GLE-5-AEC1-P.pdf
- Description:
- IC REG BUCK 5V 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,596
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Product details
Overview
MPQ4431GLE-5-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified, synchronous step-down DC/DC converter with integrated 90mΩ high-side and 80mΩ low-side MOSFETs, delivering 1A continuous output at fixed 5V with 3.3V–36V input range and 10μA sleep-mode quiescent current. It supports programmable switching frequency (350kHz–2.5MHz), external clock synchronization, power-good indication, and automotive cold-crank low-dropout mode.
For engineers reviewing the MPQ4431GLE-5-AEC1-P datasheet, MPQ4431GLE-5-AEC1-P pinout, MPQ4431GLE-5-AEC1-P application, or MPQ4431GLE-5-AEC1-P equivalent, key selection considerations include its AEC-Q100 qualification, wettable flank QFN-16 package for solder joint inspection, fixed 5V output with ±1.5% initial accuracy, valley-current OCP with hiccup protection, and thermal shutdown at 170°C.
Technical Context
The MPQ4431GLE-5-AEC1-P implements current-mode PWM control with internal error amplifier, precision 0.8V feedback reference, and valley-current overcurrent protection using dedicated ZCD circuitry. Its dual-mode operation-selectable forced CCM or advanced asynchronous mode (AAM)-enables stable regulation across load ranges while minimizing light-load losses via frequency scaling.
It integrates a 5V internal regulator powered from VIN or optional BIAS supply (5V–18V), supports external soft-start via capacitor on SS pin, and provides PG open-drain indicator with 30μs deglitch timing and ±10% output voltage window detection. The device features 80ns minimum on-time and operates down to -40°C to +125°C junction temperature.
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. |
| Output Voltage | Fixed 5V ±1.5% - Internally trimmed; eliminates external resistor divider and improves stability in noise-sensitive environments. |
| Continuous Output Current | 1A - Delivered with integrated MOSFETs; no external power stage required for compact automotive subsystems. |
| Quiescent Current | 10μA in sleep mode - Enables >1-year battery standby in always-on vehicle modules (e.g., telematics, body controllers). |
| Switching Frequency | 350kHz to 2.5MHz - Programmable via FREQ pin resistor; allows EMI optimization and small external inductor selection (e.g., 2.2μH @ 2.1MHz). |
| Thermal Shutdown | 170°C with 20°C hysteresis - Ensures fault-tolerant operation under sustained overload or poor PCB thermal design. |
| PG Accuracy Window | ±10% of nominal VOUT - Provides reliable power-good assertion for downstream microcontroller reset sequencing. |
Pinout & Package
MPQ4431GLE-5-AEC1-P is housed in a wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad, enabling automated optical solder-joint inspection per IPC-A-610 requirements for automotive production.
| 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 power input | Supplies internal control circuitry and high-side switch; requires local 10μF ceramic decoupling to minimize switching noise. |
| 3,10 SW | Switch node | Drives external inductor; internally connected pins reduce trace inductance and improve EMI performance. |
| 4,9 PGND | Power ground | High-current return path for MOSFETs; must be tied to thermal pad and routed with wide copper pour and multiple vias. |
| 5 EN | Enable control | Active-high logic input; 0.9V–1.2V threshold enables precise system-level power sequencing. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz external clock; also selects CCM (high) or AAM (low/floating) before startup. |
| 7 PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±10%; requires external pull-up for MCU reset coordination. |
| 8 BIAS | External bias supply | Optional 5V–18V input to power internal regulator, reducing dissipation and improving efficiency at high VIN. |
| 11 BST | Bootstrap supply | Connects to SW via 0.1μF ceramic capacitor to generate gate drive voltage for high-side MOSFET. |
| 12 VCC | Internal bias rail | 5V regulated output powering control logic; requires ≥1μF local decoupling for stable operation. |
| 13 AGND | Analog ground | Reference for FB, SS, and error amplifier; must be separated from PGND and joined at single point near IC. |
| 14 SS | Soft-start timing | Current-source pin (10μA) charging external capacitor; sets ramp time to limit inrush current during startup. |
| 15 FB | Feedback input | Internally connected to 5V reference divider; not used in fixed-output version - connect directly to VOUT. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets switching frequency: 180kΩ = 475kHz, 82kΩ = 1MHz, 27kΩ = 2.5MHz (typical). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C operation with extended reliability testing - suitable for engine bay, ADAS, and infotainment systems. |
| Wettable flank QFN-16 package | Enables automated X-ray and AOI inspection of solder joints - critical for zero-defect automotive manufacturing compliance. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load switching frequency to minimize gate and switching losses, achieving >85% efficiency at 1mA load. |
| Valley-current overcurrent protection | Detects inductor current at zero-crossing point to prevent runaway during short-circuit; triggers hiccup mode for safe thermal recovery. |
| Low-dropout mode | Maintains regulation down to VIN = VOUT + 0.5V - supports cold-crank operation where battery drops to 6V with 5V output required. |
| EMI-optimized design | Meets CISPR 25 Class 5 conducted/radiated emissions limits with standard layout and minimal external filtering. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head-unit systems requiring clean, stable 5V rail. IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic voltage with tight transient response and low noise. Use Value: 10μA sleep current extends battery life during vehicle off-state; AAM maintains >88% efficiency at 50mA camera idle current. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Input-stage DC/DC converter accepting wide-range automotive battery input (6V–16V) and rejecting load-dump transients. Use Value: 36V absolute max rating and built-in OCP protect against ISO 7637-2 pulse 5a/b; wettable flank ensures solder joint reliability in thermal cycling environments. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Generates 5V for microcontroller, CAN transceiver, and sensor interfaces in door modules and lighting controllers. IC Role / Device Role / Timing Role: System power manager providing enable-controlled sequencing and PG-synchronized wake-up signals. Use Value: EN pin threshold (0.9–1.2V) allows direct connection to MCU GPIO; PG output coordinates reset timing with <30μs response. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element in always-connected vehicle communication units. IC Role / Device Role / Timing Role: High-reliability primary regulator supporting long-term battery backup and fast wake-from-sleep transitions. Use Value: 1μA shutdown current enables multi-year operation on backup coin cell; AEC-Q100 qualification guarantees field longevity beyond 15 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Higher 3.5A output, 3.5V–36V input, but larger HTSSOP-16 package and 15μA quiescent current. | Lacks wettable flank; requires more board area and manual solder inspection for automotive use. | Choose when higher current headroom is needed and space constraints allow larger footprint. |
| TPS62933-Q1 | Lower 3A rating, 3V–36V input, 2.5μA IQ, but only supports 3.3V/5V/12V fixed outputs and no AAM mode. | No valley-current OCP or hiccup protection; uses peak-current limiting with less robust short-circuit behavior. | Select for ultra-low-IQ battery systems where light-load efficiency dominates over fault robustness. |
Compared with LM61480-Q1 and TPS62933-Q1, MPQ4431GLE-5-AEC1-P uniquely balances AEC-Q100 compliance, wettable flank manufacturability, 10μA sleep IQ, and valley-current OCP - making it optimal for cost-sensitive, space-constrained automotive subsystems requiring zero-defect yield.
Availability
MPQ4431GLE-5-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics systems requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for MPQ4431GLE-5-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting solutions.
The MPQ4431 product line delivers AEC-Q100-qualified, high-efficiency synchronous buck converters optimized for automotive subsystems demanding ultra-low quiescent current, robust fault protection, and manufacturable packaging.
FAQ
What is the purpose of the BIAS pin on MPQ4431GLE-5-AEC1-P?
The BIAS pin accepts an external 5V–18V supply to power the internal 5V regulator, bypassing VIN-derived regulation. This reduces power dissipation and improves efficiency-especially at high input voltages-and lowers thermal stress on the IC. If unused, BIAS must be floated or tied to GND; leaving it unconnected may cause instability.
How does the MPQ4431GLE-5-AEC1-P handle cold-crank conditions?
It enters low-dropout mode when VIN approaches VOUT, maintaining regulation down to VIN = VOUT + 0.5V. With 5V output, this allows operation at VIN as low as 5.5V-well within typical automotive cold-crank profiles (e.g., 6V for 15s). The high-duty-cycle capability and valley-current OCP ensure stable delivery without dropout or latch-off.
Can the MPQ4431GLE-5-AEC1-P be synchronized to an external clock?
Yes-apply a 350kHz–2.5MHz square wave to the SYNC pin. The external clock must exceed the RFREQ-set frequency by at least 250kHz. During synchronization, the device retains selectable in-phase or 180° out-of-phase alignment via the PHASE pin, enabling multi-rail EMI reduction in complex systems.
What is the function of the PHASE pin?
The PHASE pin configures the phase relationship between the internal switching node and the external SYNC signal. Driving PHASE high aligns SW transitions with SYNC edges (in-phase); driving it low shifts them by 180°. This enables interleaved operation with other converters to reduce input/output ripple and EMI peaks.
Is external compensation required for stable loop operation?
No-MPQ4431GLE-5-AEC1-P uses an optimized internal compensation network tailored for common 4.7μH–10μH inductors and 10μF–47μF output capacitors. External compensation is unnecessary unless custom dynamic response or unusual output capacitance (e.g., >100μF ceramic) is used, in which case refer to MPS AN-101 for guidance.
Does the PG pin require an external pull-up resistor?
Yes-the PG pin is an open-drain output and must be pulled up to a valid logic voltage (e.g., 3.3V or 5V) with a 10kΩ resistor to assert a high signal when VOUT is within ±10% of 5V. Without pull-up, PG remains floating and cannot drive MCU reset or status monitoring circuits reliably.
What is the significance of the "E" suffix in MPQ4431GLE-5-AEC1-P?
The "E" denotes wettable flank construction on the QFN-16 package-exposed vertical sidewalls on all perimeter leads that enable automated optical inspection (AOI) of solder fillets. This is mandatory for IATF 16949-compliant automotive production and eliminates reliance on X-ray for solder joint validation.
MPQ4431GLE-5-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):
- 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-P FAQ
1.How can I place an order for MPQ4431GLE-5-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4431GLE-5-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-5-AEC1-P reliable?
The price and inventory of MPQ4431GLE-5-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-5-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4431GLE-5-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4431GLE-5-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4431GLE-5-AEC1-P?
MPQ4431GLE-5-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4431GLE-5-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-5-AEC1-P?
For technical support, including MPQ4431GLE-5-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4431GLE-5-AEC1-P requirements.
6.How does Aetrix verify that MPQ4431GLE-5-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4431GLE-5-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-5-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4431GLE-5-AEC1-P?
All MPQ4431GLE-5-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4431GLE-5-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-5-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4431GLE-5-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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