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Monolithic Power Systems Inc. MPQ4423HGQ-Z
- Part No.:
- MPQ4423HGQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VDFN
- Datasheet:
-
MPQ4423HGQ-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,848
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Product details
Overview
MPQ4423HGQ-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering 3A continuous output current with 4V–36V input range, 0.8V adjustable output, and integrated 85mΩ/55mΩ MOSFETs - deployed in automotive power rails, industrial control supplies, and distributed power systems.
For engineers reviewing the MPQ4423HGQ-Z datasheet, MPQ4423HGQ-Z pinout, MPQ4423HGQ-Z application, or MPQ4423HGQ-Z equivalent, key selection criteria include cold-crank high-duty-cycle capability (95% max), 410kHz default switching frequency with 200kHz–2.2MHz external sync, Power Good open-drain signaling, and thermal shutdown with 30°C hysteresis.
Technical Context
The MPQ4423HGQ-Z operates in fixed-frequency peak-current-mode control with internal compensation, enabling stable regulation across wide VIN and load transients. Its current-mode architecture delivers fast transient response and simplifies loop design without external compensation components.
It integrates a 5V internal VCC regulator powered from VIN, bootstrap circuitry with BST pin for high-side gate drive, and a dedicated floating driver with UVLO (2.2V rising threshold). The EN/SYNC pin serves dual function: digital enable control and external clock synchronization up to 2.2MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports automotive battery rail including cold-crank down to 4V without dropout. |
| Output Current | 3A continuous - sustained at full load with thermal shutdown protection at 170°C junction temperature. |
| Switching Frequency | Default 410kHz, synchronizable 200kHz–2.2MHz - enables EMI optimization and avoids noise-sensitive bands. |
| Feedback Reference | 0.792V ±12mV - sets output voltage via external resistor divider; enables precise 0.8V–34.2V adjustment. |
| Power Good Threshold | 90% of VFB rising / 84% falling - provides accurate output-valid indication with 90μs delay and 6% hysteresis. |
| Thermal Shutdown | 170°C activation / 140°C recovery - 30°C hysteresis prevents oscillation during thermal stress. |
| Quiescent Current | 0.7mA typical at 12V - enables low-power operation in always-on automotive modules. |
Pinout & Package
MPQ4423HGQ-Z is housed in a space-saving QFN-8 (3mm × 3mm) package with wettable flank option (MPQ4423HGQE-AEC1), supporting automated optical inspection (AOI) and robust solder joint reliability in automotive assembly.
| 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 short-circuit. |
| 2 VCC | Bias Supply Rail | Internally regulated 5V output; powers internal circuitry; requires 0.1–0.22μF ceramic decoupling close to pin. |
| 3 EN/SYNC | Enable & Clock Input | Digital enable (1.4V threshold); accepts external 200kHz–2.2MHz clock for frequency synchronization; includes 500kΩ internal pull-down. |
| 4 BST | Bootstrap Supply | Drives high-side MOSFET gate; requires capacitor between BST and SW; 20Ω series resistor recommended to suppress SW node ringing. |
| 5 GND | System Ground Reference | Primary ground return for output regulation; must connect with low-inductance copper pour and multiple vias for thermal and noise performance. |
| 6 SW | Switch Node | High-frequency switching output connecting to inductor; requires wide PCB trace and minimal loop area to reduce EMI. |
| 7 IN | Main Input Supply | Accepts 4V–36V; requires local 22μF + 1μF ceramic input capacitors placed adjacent to IN/GND pins. |
| 8 PG | Power Good Open Drain | Signals valid output (high when VOUT >90% nominal); pulled low during fault, shutdown, or undervoltage; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power MOSFETs | 85mΩ HS / 55mΩ LS RDS(ON) - eliminates external FETs and reduces BOM count and board area in compact designs. |
| Automotive Cold-Crank Support | 95% maximum duty cycle - maintains regulation during engine start when battery dips to 4V–6V. |
| Internal Soft-Start | 1.5ms ramp time - prevents output overshoot and inrush current during power-up in sensitive systems. |
| Synchronous Mode Operation | Eliminates external Schottky diode - improves efficiency by 5–10% over asynchronous converters at medium-to-heavy loads. |
| OCP with Hiccup Mode | Cycle-by-cycle current limit + auto-restart on short-circuit - limits average fault current to protect IC and PCB during sustained overload. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power Supply |
|---|---|
|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interfaces in BCM under varying battery conditions (6V–16V). IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator with cold-crank support and Power Good sequencing signal. Use Value: Maintains stable output during cranking events; PG signal enables safe MCU boot sequence and fault reporting. |
Use Scenario: Supplies isolated 5V rail for digital I/O expansion modules in programmable logic controllers. IC Role / Device Role / Timing Role: High-efficiency buck converter with sync capability to align switching with system clock and reduce conducted EMI. Use Value: Enables dense, fanless PLC designs with <1.5W dissipation at full 3A load and AEC-Q100 reliability assurance. |
| Distributed Telecom Power | ADAS Camera Power Management |
|
Use Scenario: Generates 1.8V/3.3V rails for FPGA, SerDes, and memory in remote radio units with 24V/48V backplane input. IC Role / Device Role / Timing Role: Synchronous buck regulator with external clock sync to avoid interference with high-speed data links. Use Value: Achieves >92% efficiency at 2A load; 200kHz–2.2MHz sync range allows EMI spread-spectrum alignment with baseband clocks. |
Use Scenario: Powers image sensor and ISP in automotive surround-view cameras exposed to wide ambient temperature (-40°C to +105°C). IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified buck converter providing regulated 1.2V core and 2.8V analog supplies. Use Value: Guaranteed operation across full automotive temp range; thermal shutdown and hiccup mode prevent field failures due to lens heating or connector faults. |
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 |
|---|---|---|---|
| LM61480RQWR | 4.5V–36V input, 8A output, 2.1MHz max freq, no internal soft-start timer - requires external RC network. | Higher current capacity but larger QFN-16 package; lacks AEC-Q100 qualification. | Select when >3A output or higher switching frequency is required; not suitable for automotive safety-critical use. |
| TPS543320RHLR | 4.5V–18V input, 3A output, 500kHz–2.2MHz sync, integrated PMBus interface - adds telemetry and configurability. | Supports digital power management but narrower VIN range; not AEC-Q100 qualified. | Choose for industrial systems needing telemetry, margining, or dynamic voltage scaling; unsuitable for 24V+ automotive inputs. |
Compared with LM61480RQWR and TPS543320RHLR, MPQ4423HGQ-Z uniquely combines AEC-Q100 Grade 1 qualification, 4V–36V cold-crank support, and QFN-8 footprint - making it optimal for cost- and space-constrained automotive and industrial DC/DC stages where qualification and wide VIN are mandatory.
Availability
MPQ4423HGQ-Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and distributed telecom power systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for MPQ4423HGQ-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, and global manufacturing partnerships.
The MPQ4423H product line targets automotive and industrial power conversion, delivering compact, qualified, and thermally robust synchronous buck regulators optimized for harsh environments and stringent reliability requirements.
FAQ
What is the minimum input voltage required for MPQ4423HGQ-Z to regulate output during cold-crank?
The MPQ4423HGQ-Z maintains regulation down to 4V input, enabling stable operation during automotive cold-crank events where battery voltage can dip to 4–6V. Its 95% maximum duty cycle ensures sufficient on-time for the high-side switch even at this low VIN, unlike many competitors limited to 85–90% duty cycle.
Can MPQ4423HGQ-Z be synchronized to an external clock, and what is the supported frequency range?
Yes - the EN/SYNC pin accepts an external clock signal from 200kHz to 2.2MHz for precise frequency alignment. This feature allows EMI reduction through spread-spectrum synchronization and avoids interference with sensitive communication or sensing circuits in multi-rail systems.
Does MPQ4423HGQ-Z require external compensation components for loop stability?
No - the MPQ4423HGQ-Z uses an internally compensated current-mode architecture with optimized compensation network. Only the external feedback resistors and output capacitor are needed for stable operation across its full load and input range, reducing design complexity and BOM count.
How does the Power Good (PG) pin behave during startup and fault conditions?
The PG pin is an open-drain output that pulls low until VOUT reaches 90% of target (e.g., 2.97V for 3.3V output), then goes high after ~90μs delay. It pulls low again if VOUT drops below 84%, or during EN deactivation, thermal shutdown, or output short-circuit - providing unambiguous system-level power status.
What is the purpose of the BST pin, and why is a 20Ω resistor recommended between BST and SW?
The BST pin supplies the floating gate drive for the high-side MOSFET via a bootstrap capacitor. A 20Ω resistor between BST and SW dampens ringing and reduces voltage spikes at the SW node during switching transitions - improving EMI performance and preventing false triggering of overvoltage protection.
Is MPQ4423HGQ-Z compatible with wettable flank reflow inspection processes?
Yes - the MPQ4423HGQ-Z is available in both standard QFN-8 and wettable flank variants (MPQ4423HGQE-AEC1). The wettable flank version features solderable side walls enabling automated optical inspection (AOI) of solder joints, critical for automotive and high-reliability industrial assembly lines.
What protection features are built into MPQ4423HGQ-Z beyond over-current and thermal shutdown?
In addition to cycle-by-cycle over-current protection and thermal shutdown, MPQ4423HGQ-Z includes input under-voltage lockout (UVLO) with 3.5V rising/3.3V falling thresholds, hiccup-mode recovery during sustained short-circuit, bootstrap UVLO (2.2V), and Power Good fault signaling - delivering comprehensive system-level fault coverage.
MPQ4423HGQ-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):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 32.4V
- 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)
MPQ4423HGQ-Z FAQ
1.How can I place an order for MPQ4423HGQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4423HGQ-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 MPQ4423HGQ-Z reliable?
The price and inventory of MPQ4423HGQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4423HGQ-Z is usually 5 days.
3.What payment methods are accepted for MPQ4423HGQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4423HGQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4423HGQ-Z?
MPQ4423HGQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4423HGQ-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 MPQ4423HGQ-Z?
For technical support, including MPQ4423HGQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4423HGQ-Z requirements.
6.How does Aetrix verify that MPQ4423HGQ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4423HGQ-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 MPQ4423HGQ-Z meets industry standards.
7.What is the process for return or replacement of MPQ4423HGQ-Z?
All MPQ4423HGQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4423HGQ-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 MPQ4423HGQ-Z part is unused and in its original packaging.
Return procedure for MPQ4423HGQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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