My Inquiry
My Account
Monolithic Power Systems Inc. MPQ4323GDE-38-AEC1-Z
- Part No.:
- MPQ4323GDE-38-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-PowerVFQFN
- Datasheet:
-
MPQ4323GDE-38-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.8V 3A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ4323GDE-38-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 3A continuous output with 3.3V–36V input range and 42V load dump tolerance. It integrates 70mΩ high-side and 50mΩ low-side MOSFETs, supports fixed 3.8V output, and features 1μA shutdown current and frequency spread spectrum (FSS) for CISPR25 Class 5 compliance-designed for automotive infotainment power rails.
For engineers reviewing the MPQ4323GDE-38-AEC1-Z datasheet, MPQ4323GDE-38-AEC1-Z pinout, MPQ4323GDE-38-AEC1-Z application, or MPQ4323GDE-38-AEC1-Z equivalent, key selection criteria include cold-crank support down to 3.1V VIN, ±1.5% PG threshold hysteresis, 65ns minimum on-time, wettable flank QFN-12 (2mm×3mm) package, and AAM light-load efficiency mode.
Technical Context
The MPQ4323GDE-38-AEC1-Z employs peak current mode control with integrated gate drivers and a configurable switching frequency (350kHz–2.5MHz via external resistor). Its architecture includes frequency foldback at startup, thermal shutdown at 160°C–185°C, and low-dropout mode enabling stable regulation during automotive cold-crank events.
It implements advanced asynchronous modulation (AAM) to reduce quiescent current to 20μA in sleep mode, while symmetric VIN pinout and MeshConnect™ flip-chip packaging minimize EMI. The device uses a 0.8V internal reference for feedback, with FB pin accuracy of ±0.75% over –40°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.8V ±1.7% over full temperature and load range-enables direct replacement of LDOs in 3.8V camera or display bias rails. |
| Input voltage range | 3.3V to 36V with 42V transient tolerance-supports 12V/24V automotive systems including ISO 16750-2 load dump pulses. |
| Continuous output current | 3A at TJ ≤ 125°C-sustains full load under typical under-hood ambient conditions with standard PCB copper area. |
| Shutdown current | 1μA maximum-extends battery life in always-on vehicle modules such as telematics or ADAS sensors. |
| Switching frequency | Configurable 350kHz–2.5MHz via FREQ pin resistor-allows optimization between inductor size (higher fSW) and efficiency (lower fSW). |
| Thermal shutdown | 160°C to 185°C with 20°C hysteresis-prevents permanent damage during sustained overload or poor heatsinking. |
| Power good accuracy | ±1.5% hysteresis window (94.5%–105.5% of nominal)-ensures reliable system reset sequencing without external monitoring circuitry. |
Pinout & Package
MPQ4323GDE-38-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 performance via exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11 PGND | Power ground return path | Low-inductance connection point for high-current return paths; must be tied directly to thermal pad and input/output capacitors. |
| 2, 10 VIN | Main input supply | Dual VIN pins reduce trace resistance and inductance; each requires local 10μF ceramic decoupling capacitor. |
| 3 BOOT | High-side gate driver supply | Connected to SW node via 0.1μF ceramic capacitor; critical for proper high-side MOSFET turn-on timing. |
| 4 FREQ | Switching frequency set | Resistor-to-ground sets fSW; 15kΩ yields ~2.2MHz, 86.6kΩ yields ~415kHz-enables EMI tuning and layout flexibility. |
| 5 VCC | Bias regulator output | Internal 5V LDO output; requires ≥1μF ceramic capacitor close to pin to stabilize gate drive and control logic. |
| 6 AGND | Analog ground reference | Separate ground for feedback and error amplifier; must be routed away from noisy power grounds to avoid regulation error. |
| 7 FB | Feedback input | Internally connected to fixed 3.8V divider; not user-accessible in this variant-output voltage is factory-trimmed. |
| 8 PG | Open-drain power-good indicator | Signals valid output (3.8V ±1.7%) with 70μs deglitch; requires external pull-up to system rail for host processor monitoring. |
| 9 EN | Enable control | Active-high logic input; 0.85V threshold ensures compatibility with 1.8V/3.3V microcontrollers and clean start-up sequencing. |
| 12 SW | Switch node | Connection point between high-side and low-side MOSFETs; requires minimal loop area with output inductor and bootstrap capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| 42V load dump survival | Withstands ISO 16750-2 Pulse 5a transients without latch-up or parameter shift-eliminates need for external TVS clamping in front-end design. |
| 3.1V cold-crank operation | Maintains regulated 3.8V output down to 3.1V input-enables uninterrupted function during engine cranking in 12V battery systems. |
| Frequency spread spectrum (FSS) | ±10% modulation at 15kHz reduces peak EMI by >10dB across 150kHz–108MHz-meets CISPR25 Class 5 without added filtering. |
| Wettable flank QFN | Side-wettable leads enable AOI verification of solder joint integrity-critical for zero-defect automotive manufacturing requirements. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient (TJ up to +150°C)-certified for powertrain-adjacent and cockpit module placement. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
Use Scenario: Powering SoC, DDR memory, and display interface in centralized head units with wide input voltage variation. IC Role / Device Role / Timing Role: Primary 3.8V buck converter supplying core logic voltage with tight regulation and fast transient response. Use Value: Eliminates need for secondary LDO stages due to ±1.7% output accuracy and <100mV load regulation across 0–3A. |
Use Scenario: Providing clean, low-noise 3.8V rail to image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Fixed-output DC/DC regulator with PG signal for sensor initialization sequencing and fault detection. Use Value: FSS and symmetric VIN routing reduce radiated emissions below CISPR25 Class 5 limits-avoids costly shielding or board re-spin. |
| Automotive Digital Cluster | Industrial Vehicle Telematics |
Use Scenario: Supplying MCU, graphics controller, and touch controller in digital instrument clusters subject to cold-crank and load dump. IC Role / Device Role / Timing Role: High-reliability step-down regulator with low-dropout mode and thermal foldback protection. Use Value: Maintains 3.8V output during 3.1V cold-crank events and recovers automatically after thermal shutdown-no firmware intervention required. |
Use Scenario: Powering GPS/GNSS, cellular modem, and CAN transceiver in fleet management telematics units deployed in harsh environments. IC Role / Device Role / Timing Role: Automotive-grade DC/DC with 1μA shutdown current and extended temperature operation. Use Value: Enables >10-year battery-backed operation in disconnected states while meeting AEC-Q100 reliability standards. |
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-33-AEC1-Z | Fixed 3.3V output; identical package, pinout, and specs otherwise | Targets 3.3V logic rails (e.g., MCU I/O, CAN transceivers) instead of 3.8V sensor bias | Select when system requires 3.3V rather than 3.8V-no redesign needed beyond output capacitor value. |
| MPQ4323GLE-AEC1-Z | Same die in QFN-12 (3mm×4mm) package; higher θJA (50°C/W vs. 60°C/W) and wettable flank option | Better thermal margin for 3A continuous loads in constrained airflow; larger footprint | Choose for higher ambient temperatures (>85°C) or where thermal relief via larger pad area is preferred. |
Compared with MPQ4323GDE-33-AEC1-Z, this part delivers 3.8V for image sensor bias instead of 3.3V logic rails; versus MPQ4323GLE-AEC1-Z, it offers smaller footprint and tighter thermal constraints but identical electrical performance and AEC-Q100 qualification.
Availability
MPQ4323GDE-38-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and digital instrument clusters requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ4323GDE-38-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 manufacturing partnerships.
The MPQ4323 product line targets automotive power conversion with AEC-Q100 qualification, load dump resilience, and EMI-optimized packaging-designed specifically for infotainment, cluster, and ADAS subsystems operating in harsh vehicular environments.
FAQ
What is the output voltage tolerance of MPQ4323GDE-38-AEC1-Z over temperature and load?
The MPQ4323GDE-38-AEC1-Z delivers a fixed 3.8V output with ±1.7% accuracy over –40°C to +150°C junction temperature and 0–3A load range, as verified by production testing per AEC-Q100 stress conditions and confirmed in the Electrical Characteristics table (VOUT_3.8V parameter).
Does MPQ4323GDE-38-AEC1-Z require external feedback resistors?
No. This variant integrates the feedback divider for 3.8V output; the FB pin is internally connected and not accessible for adjustment. External resistors are only required for adjustable-output versions like MPQ4323GDE-AEC1-Z.
How is the switching frequency configured on this part?
Switching frequency is set by connecting a resistor from the FREQ pin to GND. For MPQ4323GDE-38-AEC1-Z, a 15kΩ resistor yields ~2.2MHz, while 86.6kΩ yields ~415kHz-values selected based on EMI requirements and inductor size constraints per the Frequency vs. RFREQ plot on page 18.
What thermal performance can be expected in the QFN-2x3mm package at 3A load?
On a standard 4-layer 2oz copper evaluation board (EVQ4323-D-00A), case thermal rise is ≤30°C at 3A and 25°C ambient with fSW = 415kHz. Junction-to-ambient thermal resistance is 60°C/W (JESD51-7), enabling full 3A operation up to +85°C ambient with adequate PCB copper area.
Is the PG (power good) signal active-high or open-drain?
The PG pin is an open-drain output requiring an external pull-up resistor to a valid logic rail (e.g., 3.3V or 5V). It asserts high when VOUT is within 94.5%–105.5% of 3.8V and pulls low outside that window, with 70μs rising and 60μs falling deglitch timing.
What protection features are built into MPQ4323GDE-38-AEC1-Z?
It includes over-current protection (hiccup mode), thermal shutdown (160°C–185°C), input over-voltage protection (35.5V–40V), under-voltage lockout (3.4V rising, 2.6V falling), and frequency foldback during startup to prevent inductor saturation-fully documented in Absolute Maximum Ratings and Electrical Characteristics sections.
Can MPQ4323GDE-38-AEC1-Z operate with input voltage below 3.3V?
No. The minimum specified operating input voltage is 3.3V, and the under-voltage lockout rising threshold is 3.4V. While cold-crank support extends down to 3.1V VIN after startup, the device will not initiate regulation below 3.4V VIN during power-up.
MPQ4323GDE-38-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-QFN (2x3)
MPQ4323GDE-38-AEC1-Z FAQ
1.How can I place an order for MPQ4323GDE-38-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4323GDE-38-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 MPQ4323GDE-38-AEC1-Z reliable?
The price and inventory of MPQ4323GDE-38-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 MPQ4323GDE-38-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4323GDE-38-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4323GDE-38-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4323GDE-38-AEC1-Z?
MPQ4323GDE-38-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4323GDE-38-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 MPQ4323GDE-38-AEC1-Z?
For technical support, including MPQ4323GDE-38-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4323GDE-38-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4323GDE-38-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4323GDE-38-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 MPQ4323GDE-38-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4323GDE-38-AEC1-Z?
All MPQ4323GDE-38-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4323GDE-38-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 MPQ4323GDE-38-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4323GDE-38-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ4323GDE-38-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…
