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Monolithic Power Systems Inc. MPQ4423GQ-Z
- Part No.:
- MPQ4423GQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VDFN
- Datasheet:
-
MPQ4423GQ-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
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Product details
Overview
MPQ4423GQ-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC designed for automotive and industrial power rails. It delivers 3A continuous output current with 4V–30V input range, 410kHz default switching frequency, and AEC-Q100 Grade 1 qualification-enabling robust 12V/24V system regulation in engine control units and ADAS camera modules.
For engineers reviewing the MPQ4423GQ-Z datasheet, MPQ4423GQ-Z pinout, MPQ4423GQ-Z application, or MPQ4423GQ-Z equivalent, key selection criteria include its 36V transient tolerance for automotive load dump, internal 85mΩ/55mΩ MOSFETs, power-good signaling, thermal shutdown at 170°C, and EN/SYNC pin dual functionality for enable control or external clock synchronization.
Technical Context
The MPQ4423GQ-Z employs peak-current-mode control with fixed-frequency PWM operation, using an internal 0.8V reference and error amplifier to regulate output voltage via FB feedback. Its cycle-by-cycle over-current protection triggers hiccup mode during sustained short-circuit faults, limiting average fault current and die temperature rise.
It integrates a bootstrap charging circuit with dedicated UVLO (2.2V rising threshold) for high-side gate drive, supports external clock synchronization from 200kHz to 2.2MHz, and features programmable soft-start (1.5ms typical) and adjustable UVLO via EN pin resistor divider-enabling cold-crank compatibility down to 4V input with >92% maximum duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 30V continuous; withstands 36V transients for automotive load dump survival |
| Output Current | 3A continuous; supports peak inductor current up to 5.7A before OCP activation |
| Switching Frequency | Default 410kHz; synchronizable to 200kHz–2.2MHz external clock for EMI reduction |
| Feedback Reference | 792mV typical; ±12mV tolerance ensures tight output regulation across temperature |
| Power Good Threshold | 90% of VFB rising (≈713mV at 3.3V output); provides reliable rail-valid indication with 90μs delay |
| Thermal Shutdown | 170°C junction activation with 30°C hysteresis; prevents permanent damage during overload |
| Quiescent Current | 0.7mA typical at VIN=12V; enables low-power standby modes in always-on systems |
Pinout & Package
MPQ4423GQ-Z is housed in a thermally enhanced QFN-8 (3mm × 3mm) package with exposed thermal pad, optimized for high-power density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback Input | Connects to resistor divider tap; sets output voltage and enables fold-back frequency reduction during short-circuit |
| 2 VCC | Bias Supply Rail | Powers internal circuitry; requires 0.1–0.22μF ceramic decoupling close to pin |
| 3 EN/SYNC | Enable & Clock Input | Logic-high enables regulator; external clock signal synchronizes switching edge (200kHz–2.2MHz) |
| 4 BST | Bootstrap Supply | Drives high-side MOSFET gate; requires capacitor between BST and SW, plus 20Ω series resistor |
| 5 GND | System Ground Reference | Return path for output current and feedback; must connect via wide trace and multiple vias to thermal pad |
| 6 SW | Switch Node | High-frequency switching output; connects to inductor and BST capacitor; demands low-inductance layout |
| 7 IN | Main Input Supply | Accepts 4–30V; requires parallel 22μF + 1μF ceramic capacitors placed adjacent to IN/GND pins |
| 8 PG | Open-Drain Power-Good | Asserts high when VOUT ≥ 90% of target; sinks 4mA; requires external pull-up to VCC or bias rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualification | Validated for −40°C to +125°C ambient operation in automotive powertrain and body electronics |
| Integrated 85mΩ/55mΩ MOSFETs | Eliminates external high-side/low-side switches; reduces BOM count and layout area by >30% |
| Automotive Cold-Crank Support | Operates down to 4V input with >92% duty cycle-maintains regulated output during engine start |
| Power-Save Mode | Reduces switching frequency under light load to maintain >85% efficiency at 10mA output |
| Internal Soft-Start | 1.5ms ramp time prevents output overshoot and inrush current during power-up sequences |
Applications
| Engine Control Unit (ECU) Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Regulating 5V or 3.3V from noisy 12V vehicle battery for microcontroller and sensor rails. IC Role / Device Role / Timing Role: Primary buck converter delivering stable, low-noise power with load-dump immunity and cold-crank support. Use Value: Eliminates need for external TVS and pre-regulator stages; simplifies compliance with ISO 7637-2 Pulse 5a/b requirements. |
Use Scenario: Powering image sensor, ISP, and interface logic in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with fast transient response to handle burst-mode imaging loads. Use Value: Maintains <1% output ripple under dynamic load steps; PG signal enables firmware-controlled power sequencing. |
| Industrial PLC I/O Module | Telematics Control Unit (TCU) |
|
Use Scenario: Generating isolated 3.3V/5V rails for digital I/O, CAN transceivers, and analog front-ends in factory automation. IC Role / Device Role / Timing Role: Robust DC/DC stage tolerant of 36V surges on 24V industrial bus lines. Use Value: Reduces thermal derating needs via QFN-8 thermal pad; supports extended lifetime in sealed enclosures. |
Use Scenario: Supplying LTE modem, GNSS receiver, and MCU in connected vehicle telematics hardware. IC Role / Device Role / Timing Role: Synchronous buck with EN/SYNC pin enabling synchronized switching across multiple rails to minimize EMI peaks. Use Value: Enables spread-spectrum-like noise reduction without external components; meets CISPR 25 Class 5 limits. |
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 |
|---|---|---|---|
| LM61480QRNTRQ1 | Higher 8A rating; 2.1MHz max frequency; requires external compensation | Better suited for higher-current infotainment SoC rails; larger solution size due to external loop components | Select when >3A output or >1MHz switching is required; avoid if minimizing BOM count is critical |
| TPS543320RHLR | 4A rating; PMBus interface; integrated telemetry; 1.8MHz default fSW | Enables real-time monitoring in server-grade automotive gateways; adds firmware complexity | Choose for diagnostic-rich designs needing voltage/current/temperature reporting; not cost-optimized for basic conversion |
Compared with LM61480QRNTRQ1 and TPS543320RHLR, the MPQ4423GQ-Z offers optimal balance of AEC-Q100 reliability, minimal external component count, and thermal performance in compact QFN-8 packaging-making it ideal for cost-sensitive, space-constrained automotive subsystems where 3A output suffices.
Availability
MPQ4423GQ-Z is available at Aetrix Electronics and suitable for automotive ECU power supplies, ADAS camera modules, industrial PLC I/O, and telematics control units requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for MPQ4423GQ-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.
The MPQ4423 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for harsh-environment vehicle subsystems requiring high efficiency, transient resilience, and functional safety readiness.
FAQ
What is the maximum input voltage the MPQ4423GQ-Z can withstand without damage?
The MPQ4423GQ-Z has an absolute maximum input voltage rating of 40V, with guaranteed 36V transient tolerance per ISO 7637-2 for automotive load dump events. Continuous operation is specified from 4V to 30V; exceeding 30V continuously may trigger thermal shutdown or reduce lifetime reliability.
Does the MPQ4423GQ-Z require external compensation components?
No-MPQ4423GQ-Z features an internally compensated current-mode control loop. The device uses optimized internal compensation network that eliminates need for external Type-II or Type-III compensation networks, reducing BOM count and layout complexity while maintaining stability across standard output capacitor ESR ranges.
How does the EN/SYNC pin function in both enable and synchronization modes?
When driven high (>1.4V), EN/SYNC enables regulation; when pulled low (<1.25V), it disables the converter. To synchronize, apply a clean CMOS clock signal (200kHz–2.2MHz) after startup-internal circuitry aligns the internal oscillator's rising edge to the external clock's rising edge with <1.7μs pulse width requirement.
What is the purpose of the BST pin and why is a 20Ω resistor recommended?
The BST pin supplies gate drive voltage to the internal high-side MOSFET via a bootstrap capacitor. A 20Ω resistor between BST and SW reduces voltage spikes caused by parasitic inductance during switching transitions-improving EMI performance and preventing false triggering of the bootstrap UVLO (2.2V threshold).
Can the MPQ4423GQ-Z operate reliably at −40°C ambient temperature?
Yes-the MPQ4423GQ-Z is AEC-Q100 Grade 1 qualified, with guaranteed operation from −40°C to +125°C junction temperature. Its internal reference, error amplifier, and MOSFET RDS(ON) characteristics are characterized across this full range, and thermal shutdown activates only above 170°C junction temperature.
What output voltage accuracy can be expected across line, load, and temperature?
The MPQ4423GQ-Z guarantees feedback reference voltage of 792mV ±12mV (±1.5%) at +25°C, with total output voltage error-including resistor divider tolerance, line/load regulation, and temperature drift-typically within ±2% over full operating conditions when using 1% resistors and proper layout.
Is there a difference between MPQ4423GQ-Z and MPQ4423GQ-AEC1-Z?
Yes-MPQ4423GQ-Z is the standard industrial-grade version; MPQ4423GQ-AEC1-Z is identical in silicon but undergoes additional AEC-Q100 stress testing and screening per Grade 1 requirements (−40°C to +125°C), with certified test reports and automotive-specific traceability documentation included in shipment.
MPQ4423GQ-Z 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (3x3)
MPQ4423GQ-Z FAQ
1.How can I place an order for MPQ4423GQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4423GQ-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 MPQ4423GQ-Z reliable?
The price and inventory of MPQ4423GQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4423GQ-Z is usually 5 days.
3.What payment methods are accepted for MPQ4423GQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4423GQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4423GQ-Z?
MPQ4423GQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4423GQ-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 MPQ4423GQ-Z?
For technical support, including MPQ4423GQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4423GQ-Z requirements.
6.How does Aetrix verify that MPQ4423GQ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4423GQ-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 MPQ4423GQ-Z meets industry standards.
7.What is the process for return or replacement of MPQ4423GQ-Z?
All MPQ4423GQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4423GQ-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 MPQ4423GQ-Z part is unused and in its original packaging.
Return procedure for MPQ4423GQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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