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Monolithic Power Systems Inc. MPQ4423GQ-AEC1-P
- Part No.:
- MPQ4423GQ-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VDFN
- Datasheet:
-
MPQ4423GQ-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 3A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:438
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Product details
Overview
MPQ4423GQ-AEC1-P from Monolithic Power Systems is a synchronous step-down DC/DC converter delivering 3A continuous output current with 4V–30V input range, 36V transient tolerance, and AEC-Q100 Grade 1 qualification for automotive power rails. It integrates 85mΩ/55mΩ high- and low-side MOSFETs, operates at 410kHz (syncable to 200kHz–2.2MHz), and supports cold-crank operation via >92% duty cycle.
For engineers reviewing the MPQ4423GQ-AEC1-P datasheet, MPQ4423GQ-AEC1-P pinout, MPQ4423GQ-AEC1-P application, or MPQ4423GQ-AEC1-P equivalent, key selection criteria include automotive-grade thermal shutdown (170°C), Power Good open-drain signaling, internal soft-start (1.5ms), and bootstrap capacitor support for high-duty-cycle operation.
Technical Context
The MPQ4423GQ-AEC1-P uses peak-current-mode control with fixed-frequency PWM, enabling fast transient response and simplified loop compensation. Its integrated 5V bias regulator powers internal circuitry across the full VIN range and features UVLO (3.5V rising / 3.3V falling) tied to VCC voltage monitoring.
It implements cycle-by-cycle over-current protection with hiccup mode recovery during output short-circuit, and includes dedicated bootstrap charging with internal PMOS pass transistor and floating driver UVLO (2.2V rising). The EN/SYNC pin serves dual function: digital enable control and external clock synchronization with 2ms delay alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 30V continuous; supports automotive load dump up to 36V transient |
| Output Current | 3A continuous; validated across -40°C to +125°C junction temperature |
| Switching Frequency | Default 410kHz; synchronizable to external 200kHz–2.2MHz clock |
| RDS(ON) | 85mΩ (HS) / 55mΩ (LS); enables high efficiency at 3A load without external FETs |
| Feedback Reference | 0.792V ±12mV at 25°C; sets output voltage via external resistor divider |
| Power Good Threshold | 90% of VFB rising / 84% falling; provides accurate rail monitoring with 90μs delay |
| Thermal Shutdown | 170°C trip / 140°C hysteresis; protects die under sustained overload or poor PCB thermal design |
Pinout & Package
MPQ4423GQ-AEC1-P is housed in a thermally enhanced QFN-8 (3mm × 3mm) package with exposed thermal pad, optimized for automotive PCB layouts requiring high power density and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback Input | Connects to resistor divider tap; regulates output by comparing against 0.792V reference; triggers fold-back at <660mV during fault |
| 2 VCC | Bias Supply | Internal 5V regulator output; requires 0.1–0.22μF ceramic decoupling; powers internal logic and gate drivers |
| 3 EN/SYNC | Enable & Clock Input | Digital enable (1.4V threshold); accepts external sync signal (200kHz–2.2MHz); includes 500kΩ pull-down |
| 4 BST | Bootstrap Supply | Drives high-side MOSFET gate; requires capacitor between BST and SW; 20Ω series resistor recommended to suppress SW spikes |
| 5 GND | System Ground | Reference for output voltage and internal circuits; must connect directly to thermal pad and large copper pour |
| 6 SW | Switch Node | High-frequency switching output node; connects to inductor; requires wide trace and minimal loop area |
| 7 IN | Main Input Supply | Accepts 4–30V input; requires local 22μF + 1μF ceramic decoupling; handles 36V transients |
| 8 PG | Power Good Output | Open-drain status flag; pulled low during startup, thermal shutdown, or EN deassertion; rises after VOUT reaches 90% target |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 (−40°C to +125°C TJ) with full production test screening |
| Cold-Crank Support | Maximum duty cycle ≥92% enables stable 3.3V/5V output during 4.5V battery cranking |
| Integrated Protection | OCP with hiccup recovery, thermal shutdown with 30°C hysteresis, and input UVLO with 200mV hysteresis |
| Efficiency Optimization | Synchronous rectification + low RDS(ON) MOSFETs + power-save mode reduce light-load losses |
| Startup Control | Internal 1.5ms soft-start prevents output overshoot and limits inrush current into output capacitors |
Applications
| ADAS Camera Power Rail | Infotainment System Core Supply |
|---|---|
|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view camera modules exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter supplying regulated power to CMOS sensor and video processor. Use Value: 36V transient tolerance withstands load dump; AEC-Q100 Grade 1 ensures reliability at 125°C junction; PG signal validates rail before sensor initialization. |
Use Scenario: Generates 1.1V core voltage for ARM-based infotainment SoC in dashboard head units. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with tight output regulation and fast transient response. Use Value: 410kHz switching enables small 2.2μH inductor; internal compensation reduces BOM count; power-save mode extends standby battery life. |
| Body Control Module (BCM) Subsystem | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Supplies 5V to LIN transceivers, door lock actuators, and ambient lighting controllers. IC Role / Device Role / Timing Role: Centralized 5V rail generator with robust EMI performance and fault reporting. Use Value: EN/SYNC pin allows synchronization to main MCU clock to reduce system-level noise; hiccup OCP prevents latch-up during motor stall events. |
Use Scenario: Provides isolated 3.3V supply to torque and position sensors in EPS column-assist systems. IC Role / Device Role / Timing Role: Safety-critical auxiliary power source with diagnostic feedback via PG and thermal monitoring. Use Value: Thermal shutdown at 170°C prevents failure during prolonged assist; PG signal feeds safety monitor MCU for real-time rail health assessment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54360BQPWPRQ1 | 4.5–60V input, 3.5A, 100kHz–2.5MHz sync, no integrated BST diode drive | Higher VIN max supports 48V systems; lower default fSW increases inductor size | Prefer when input exceeds 30V or higher thermal margin needed; requires external BST diode for >70% duty cycle |
| LM61480QRNXTQ1 | 3–36V input, 8A, 200kHz–2.2MHz sync, 3.3V VREF, no cold-crank optimization | Higher current rating; lacks dedicated cold-crank high-duty-cycle mode | Choose for scalable 5–8A designs where cold-crank is managed upstream; larger package (3.5mm×4.5mm) |
Compared with TPS54360BQPWPRQ1 and LM61480QRNXTQ1, MPQ4423GQ-AEC1-P delivers optimal balance of compact QFN-8 footprint, automotive cold-crank capability, and integrated protection-making it ideal for space-constrained 3A rails where 4.5V minimum input and 36V transients dominate.
Availability
MPQ4423GQ-AEC1-P is available at Aetrix Electronics and suitable for ADAS camera power rails, infotainment SoC core supplies, and body control module subsystems requiring stable component supply with AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for MPQ4423GQ-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 focus on energy-efficient DC/DC conversion, motor drivers, and automotive-grade solutions.
The MPQ4423 belongs to MPS's AEC-Q100-qualified automotive power portfolio, designed specifically for demanding 12V/24V vehicle subsystems requiring high reliability, thermal resilience, and compact integration.
FAQ
What is the maximum allowable input voltage transient for MPQ4423GQ-AEC1-P?
The device supports 36V input transients per AEC-Q100 load-dump specification. Absolute maximum VIN is 40V, but sustained operation above 30V is not recommended. Transient immunity is verified per ISO 7637-2 Pulse 5a, and the internal MOSFETs are rated for 41V SW node stress.
Does MPQ4423GQ-AEC1-P require an external bootstrap diode?
No external bootstrap diode is required for standard operation. The IC includes an internal bootstrap charging circuit with PMOS pass transistor. An external diode (e.g., IN4148) is optional and only beneficial when operating above 65% duty cycle to improve efficiency and reduce BST capacitor stress.
How is Power Good (PG) behavior affected during thermal shutdown?
PG is actively pulled low during thermal shutdown, EN deassertion, or output undervoltage (FB < 84% of 0.792V). It remains low until thermal recovery (TJ < 140°C), EN reassertion, and VOUT stabilization above 90% of target-ensuring unambiguous fault indication for safety-critical systems.
Can MPQ4423GQ-AEC1-P operate with input voltage below 4V?
No. The device has a hard UVLO threshold of 3.5V (rising) and will not start or sustain regulation below 4V continuous input. For cold-crank scenarios down to 4.5V, its >92% duty cycle ensures stable 3.3V/5V output-verified across full temperature range per AEC-Q100 Grade 1 requirements.
What is the purpose of the 20Ω resistor recommended between BST and SW?
The 20Ω resistor dampens high-frequency ringing at the SW node during switching transitions, reducing electromagnetic interference and preventing false triggering of the bootstrap UVLO. It also limits inrush current into the BST capacitor, improving long-term reliability without significantly impacting efficiency.
Is the FB voltage reference trimmed at production?
Yes. The internal 0.792V reference is factory-trimmed to ±1.5% (780–804mV) at 25°C and maintains ±2.5% tolerance across −40°C to +125°C. This enables accurate output setting using standard 1% resistors without external calibration.
How does hiccup mode protect the device during output short-circuit?
When FB drops below 84% of reference due to overload, the IC enters hiccup mode: it disables switching for ~10ms, then attempts restart. This limits average short-circuit current to <1A, preventing thermal runaway and enabling safe recovery once fault is removed-validated per AEC-Q100 stress testing.
MPQ4423GQ-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-VDFN
- 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):
- 4V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 27V
- Current - Output:
- 3A
- Frequency - Switching:
- 410kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (3x3)
MPQ4423GQ-AEC1-P FAQ
1.How can I place an order for MPQ4423GQ-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4423GQ-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 MPQ4423GQ-AEC1-P reliable?
The price and inventory of MPQ4423GQ-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 MPQ4423GQ-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4423GQ-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4423GQ-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4423GQ-AEC1-P?
MPQ4423GQ-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4423GQ-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 MPQ4423GQ-AEC1-P?
For technical support, including MPQ4423GQ-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4423GQ-AEC1-P requirements.
6.How does Aetrix verify that MPQ4423GQ-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4423GQ-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 MPQ4423GQ-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4423GQ-AEC1-P?
All MPQ4423GQ-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4423GQ-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 MPQ4423GQ-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4423GQ-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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