My Inquiry
My Account
Monolithic Power Systems Inc. MPQ4323MGQCE-AEC1-Z
- Part No.:
- MPQ4323MGQCE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-PowerVFQFN
- Datasheet:
-
MPQ4323MGQCE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,975
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ4323MGQCE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 3A continuous output current with 3.3V–36V input range and 42V load dump tolerance. It integrates 70mΩ high-side and 50mΩ low-side MOSFETs, supports frequency configuration from 350kHz to 2.5MHz, and operates across –40°C to +150°C junction temperature-designed for automotive infotainment, clusters, and ADAS power rails.
For engineers reviewing the MPQ4323MGQCE-AEC1-Z datasheet, MPQ4323MGQCE-AEC1-Z pinout, MPQ4323MGQCE-AEC1-Z application, or MPQ4323MGQCE-AEC1-Z equivalent, key selection considerations include cold-crank support (3.1V min VIN), 1μA shutdown current, CISPR25 Class 5 EMI compliance, wettable flank QFN-12 (2mm×3mm) package, and integrated power good signaling with ±1.5% threshold hysteresis.
Technical Context
The MPQ4323MGQCE-AEC1-Z employs peak current mode control with programmable switching frequency via external resistor on FREQ pin, enabling optimization for efficiency (via light-load AAM mode) or EMI (via FSS modulation and symmetric VIN pinout). Its minimum on/off times (65ns/50ns) support high duty cycle operation during cold-crank and low dropout mode below 3.9V VIN.
Thermal protection includes thermal shutdown at 160°C–185°C with 20°C hysteresis, while over-current protection uses hiccup-mode limiting with HS peak current (4.3–7.3A) and LS valley current (3–5.7A) thresholds. The device features MeshConnect™ flip-chip packaging for enhanced thermal performance and solder joint reliability in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V operating; withstands 42V transient load dump per ISO16750-enables direct battery connection in 12V/24V automotive systems. |
| Output Current | 3A continuous; supported by integrated 70mΩ HS and 50mΩ LS MOSFETs-eliminates need for external power switches in compact designs. |
| Quiescent Current | 20μA sleep mode / 1μA shutdown-extends battery life in always-on vehicle modules like telematics and body controllers. |
| Switching Frequency | Configurable 350kHz–2.5MHz via FREQ pin resistor; ±10% spread spectrum-reduces EMI peaks to meet CISPR25 Class 5 radiated/conducted limits. |
| Feedback Reference | 0.8V ±0.6% (–40°C to +150°C)-enables precise adjustable output regulation; fixed versions available at 3.3V/3.8V ±2% accuracy. |
| Power Good Threshold | 94.5%–105.5% of nominal VOUT with 1.5% hysteresis-provides reliable system reset and sequencing control without external comparators. |
| Operating Temperature | –40°C to +150°C junction-qualified to AEC-Q100 Grade 1, supporting under-hood and dashboard applications. |
Pinout & Package
MPQ4323MGQCE-AEC1-Z is housed in a wettable flank QFN-12 package measuring 2mm × 3mm with 0.5mm pitch. The package enables automated optical inspection (AOI) of solder joints and improves thermal dissipation via exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 PGND | Power ground reference | Dual low-inductance ground paths for high-frequency return currents; must be connected to solid thermal pad for optimal thermal and EMI performance. |
| 2, 10 VIN | Main input supply | Two parallel VIN pins reduce IR drop and improve current sharing; each requires local 10µF ceramic decoupling close to pin. |
| 3 BOOT | High-side gate driver supply | Connected to SW node via 0.1µF ceramic capacitor; enables bootstrap operation for N-channel HS MOSFET drive above VIN. |
| 4 FREQ | Frequency configuration | Resistor-to-ground sets fSW (350kHz–2.5MHz); enables EMI tuning and inductor size optimization without changing layout. |
| 5 VCC | Bias regulator output | Internal 5V LDO output; requires ≥1µF ceramic capacitor to stabilize gate drivers and control circuitry under dynamic load. |
| 6 AGND | Analog ground reference | Separate analog ground for FB, EN, and PG circuits-must be tied to PGND at single point near IC to avoid noise coupling. |
| 7 FB | Feedback voltage sense | 0.8V reference input; connects to resistor divider for adjustable outputs or directly to VOUT for fixed versions-determines regulation accuracy. |
| 8 PG | Open-drain power good | Indicates VOUT within ±5.5% window; requires external pull-up for system monitoring-supports safe power sequencing in multi-rail systems. |
| 9 EN | Enable control | Logic-level enable (0.85V low / 1.02V high); no internal pull-up-allows direct MCU GPIO control with precise startup timing. |
| 12 SW | Switch node | Connection point between HS and LS MOSFETs; drives external inductor-requires tight layout with minimal loop area to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| 42V Load Dump Tolerance | Withstands ISO16750-2 Pulse 5a transients without derating or external clamping-reduces BOM count in automotive front-end supplies. |
| Low-Dropout Mode | Maintains regulation down to 3.1V VIN (cold crank); achieves >90% efficiency at 3A even when VIN ≈ VOUT-critical for engine start-stop systems. |
| Advanced Asynchronous Modulation (AAM) | Reduces light-load IQ to 20μA by skipping pulses; maintains high efficiency across 10μA–3A load range-ideal for always-on vehicle networks. |
| Wettable Flank QFN | Side-wettable leads enable AOI verification of solder fillet height-improves manufacturing yield and field reliability in automotive production. |
| CISPR25 Class 5 Compliance | Meets stringent automotive EMI limits without shielding or ferrites due to FSS, symmetric VIN routing, and optimized gate drive slew rates. |
Applications
| Automotive Infotainment Systems | Automotive Clusters |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head units with wide battery voltage variation and strict EMI requirements. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic and interface rails; provides PG signal for SoC reset coordination. Use Value: 42V load dump tolerance eliminates need for upstream TVS; 1μA shutdown extends parking mode battery life beyond 30 days. |
Use Scenario: Supplying microcontroller, TFT backlight, and CAN transceiver in digital instrument clusters exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Main 3.3V rail generator with cold-crank support; PG output synchronizes cluster boot sequence with ignition status. Use Value: –40°C to +150°C operation ensures reliability at dashboard mounting locations; wettable flank package enables 100% AOI coverage. |
| Advanced Driver Assistance Systems | Industrial Power Systems |
|
Use Scenario: Providing stable 5V supply to radar sensor processors and camera ISPs in ADAS ECUs subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with frequency foldback during startup-prevents inductor saturation during power-on surge. Use Value: 65ns minimum on-time supports high VIN/VOUT ratios (e.g., 24V→5V @ 2.2MHz); CISPR25 Class 5 compliance avoids costly EMI rework. |
Use Scenario: Replacing legacy discrete buck solutions in industrial HMIs and PLC I/O modules requiring AEC-Q100 reliability metrics. IC Role / Device Role / Timing Role: Drop-in replacement for non-automotive converters where extended temperature and long-term supply continuity are critical. Use Value: Same footprint as MPQ4323GDE-AEC1; RoHS/halogen-free and MPS green status supports global environmental compliance programs. |
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 |
|---|---|---|---|
| MPQ4323GDE-AEC1-Z | Same die, identical electrical specs, but QFN-12 (2mm×3mm) without wettable flanks | Lacks AOI-capable leads; suitable for cost-sensitive non-safety-critical modules where visual solder inspection is not mandated | Select when AOI is not required and board space is constrained-same thermal performance but lower process assurance. |
| LM61480-Q1 | TI part with 3.5A rating, 3.5V–36V input, 1.5μA shutdown, but no FSS or wettable flanks; larger 16-pin WQFN | Higher current capability but larger footprint and no CISPR25 Class 5 pre-certification; requires external compensation | Choose if higher output current or TI design ecosystem preference outweighs EMI certification and package inspection benefits. |
Compared with MPQ4323GDE-AEC1-Z, the MGQCE variant adds wettable flanks for full solder joint inspection-critical for ASIL-B systems-while LM61480-Q1 trades EMI robustness and package manufacturability for marginally higher current and TI-specific toolchain integration.
Availability
MPQ4323MGQCE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, digital clusters, ADAS ECUs, and industrial HMIs requiring stable component supply with AEC-Q100 qualification and long-term lifecycle support.
Supply support for MPQ4323MGQCE-AEC1-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 power management ICs, with design centers in the US, China, and Taiwan, and global distribution through authorized partners.
The MPQ4323 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-temperature, high-reliability vehicle subsystems-including infotainment, instrumentation, and ADAS-where load dump resilience, cold-crank operation, and EMI compliance are mandatory.
FAQ
What is the minimum input voltage required for startup and sustained operation?
The MPQ4323MGQCE-AEC1-Z starts up when VIN exceeds 3.65V (typical UVLO rising threshold) and sustains regulation down to 3.1V after startup-enabling reliable operation during automotive cold-crank events per ISO16750-2 Pulse 4.
How does the frequency spread spectrum (FSS) feature reduce EMI?
FSS modulates the switching frequency by ±10% at 15kHz, spreading energy across a bandwidth instead of concentrating it at harmonics-this lowers peak conducted/radiated emissions to meet CISPR25 Class 5 limits without added filtering components.
Can the MPQ4323MGQCE-AEC1-Z operate without an external feedback resistor divider?
Yes-when used in fixed-output configurations (e.g., MPQ4323GDE-33-AEC1), the FB pin is internally connected to the output, eliminating the need for external resistors; adjustable versions require a precision divider to set VOUT = 0.8V × (1 + R1/R2).
What thermal performance can be expected in the QFN-12 (2mm×3mm) package?
On a standard 4-layer 2oz copper evaluation board, θJA is 35.5°C/W and θJC is 3.5°C/W; at 3A load and 12V input, case temperature rise remains below 30°C-enabling convection-only cooling in most automotive enclosures.
Is the PG (power good) signal compatible with 1.8V or 3.3V logic interfaces?
PG is an open-drain output requiring an external pull-up; it sinks ≤1mA at 0.3V low level-making it directly compatible with 1.8V, 3.3V, or 5V logic families when pulled to the target rail voltage.
Does the device support forced PWM mode, or is it limited to AAM operation?
The MPQ4323MGQCE-AEC1-Z operates exclusively in AAM (asynchronous modulation) mode at light loads to minimize IQ; it does not offer forced PWM-however, frequency foldback and minimum on/off time control preserve stability and efficiency across the full load range.
What is the recommended PCB layout practice for the BOOT and SW pins?
A compact 0.1µF ceramic capacitor must be placed directly between BOOT and SW with minimal trace length (<2mm) and no vias; SW routing should use wide, short traces with adjacent ground pour to minimize parasitic inductance and ringing.
MPQ4323MGQCE-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 12-PowerVFQFN
- 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):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-QFN (3.5x3.5)
MPQ4323MGQCE-AEC1-Z FAQ
1.How can I place an order for MPQ4323MGQCE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4323MGQCE-AEC1-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 MPQ4323MGQCE-AEC1-Z reliable?
The price and inventory of MPQ4323MGQCE-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4323MGQCE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4323MGQCE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4323MGQCE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4323MGQCE-AEC1-Z?
MPQ4323MGQCE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4323MGQCE-AEC1-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 MPQ4323MGQCE-AEC1-Z?
For technical support, including MPQ4323MGQCE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4323MGQCE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4323MGQCE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4323MGQCE-AEC1-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 MPQ4323MGQCE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4323MGQCE-AEC1-Z?
All MPQ4323MGQCE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4323MGQCE-AEC1-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 MPQ4323MGQCE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4323MGQCE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ4323MGQCE-AEC1-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
