My Inquiry
My Account
Monolithic Power Systems Inc. MPQ4328GRE-AEC1-Z
- Part No.:
- MPQ4328GRE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-PowerVFQFN
- Datasheet:
-
MPQ4328GRE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 4A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ4328GRE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 45mΩ high-side and 25mΩ low-side MOSFETs, delivering up to 4A continuous output current across a 3.3V–36V input range. It features 1μA shutdown current, configurable 200kHz–2.5MHz switching frequency, and operates from –40°C to +150°C junction temperature-designed for automotive infotainment, ADAS, and cluster power rails.
For engineers reviewing the MPQ4328GRE-AEC1-Z datasheet, MPQ4328GRE-AEC1-Z pinout, MPQ4328GRE-AEC1-Z application, or MPQ4328GRE-AEC1-Z equivalent, key selection criteria include cold-crank dropout capability, CISPR25 Class 5 EMI compliance, AAM/FCCM mode control via SYNC/MODE pin, and wettable-flank QFN-14 package suitability for automated optical inspection in automotive PCB assembly.
Technical Context
The MPQ4328 employs peak current-mode control with frequency foldback during start-up to prevent inductor current runaway. Its advanced asynchronous modulation (AAM) dynamically scales switching frequency at light loads to minimize gate driver and switching losses-enabling 24μA quiescent current in sleep mode and extending battery life in always-on automotive subsystems.
Thermal robustness is ensured by internal thermal shutdown (155°C–185°C trip range) and a mesh-connected flip-chip QFN-14 package that reduces θJA to 25.7°C/W on MPS reference boards. The device supports external clock synchronization, programmable soft-start (4.5–7.5ms), and precise power-good monitoring with ±1.5% hysteresis around 94.5–105.5% VOUT nominal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (down to 3.3V) and 42V load dump transients. |
| Output Current | Up to 4A continuous - enabled by integrated 45mΩ HS-FET and 25mΩ LS-FET with optimized thermal path in QFN-14 package. |
| Quiescent Current | 1μA in shutdown, 24μA in sleep mode - enables ultra-low-power standby for always-on vehicle modules. |
| Switching Frequency | 200kHz to 2.5MHz (configurable via FREQ pin resistor) - allows EMI tuning and inductor size optimization across applications. |
| Feedback Reference | 0.800V ±6mV (–40°C to +150°C) - ensures stable regulation accuracy over full automotive temperature range. |
| Power Good Threshold | 94.5% to 105.5% of VOUT nominal - provides reliable system-level power sequencing and fault detection. |
| Operating Junction Temp | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard electronics. |
Pinout & Package
MPQ4328GRE-AEC1-Z is housed in a wettable-flank QFN-14 (4mm × 4mm) package with exposed thermal pad, optimized for automotive reflow and AOI inspection. Pin 1 is marked with dot; top-side marking includes "MP4328" prefix, year/week code, lot number, and "E" for wettable flank.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 PGND | Power ground return | Dual low-inductance ground paths for high-current switching loop stability and EMI reduction. |
| 2, 12 VIN | Main input supply | Two parallel VIN pins reduce IR drop and improve transient response; require local ceramic decoupling per pin. |
| 3 BST | Bootstrap supply | Connects to SW node via 0.1µF ceramic capacitor to enable high-side gate drive above VIN. |
| 4 SYNC/MODE | Mode selection & sync input | Pull ≤0.4V for AAM (light-load efficiency), ≥1.4V for FCCM, or drive with 200kHz–2.5MHz external clock. |
| 5 BIAS | External bias supply | Connect to 5V VOUT to reduce IQ to 3µA; mandatory connection-do not float. |
| 6 VCC | Internal LDO output | 5V regulated supply for control circuitry; requires ≥1µF ceramic capacitor placed adjacent to pin. |
| 7 AGND | Analog ground reference | Separate ground for feedback and sensing circuitry to avoid noise coupling into regulation loop. |
| 8 FB | Feedback input | 0.8V reference threshold; connect directly to VOUT for fixed-output versions or to divider midpoint for adjustable outputs. |
| 9 FREQ | Frequency configuration | Resistor-to-ground sets fSW: 49.9kΩ → ~410kHz, 19.6kΩ → ~1MHz, 8.66kΩ → ~2.2MHz. |
| 10 PG | Open-drain power good | Indicates VOUT within ±5.5% window; requires external pull-up for system monitoring and sequencing. |
| 11 EN | Enable control | Active-high logic: >1.02V enables, <0.85V disables; internal 100kΩ pull-down ensures default-off behavior. |
| 14 SW | Switch node | Drain of LS-FET / source of HS-FET; high dv/dt node requiring tight layout and minimal trace length. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +150°C TJ) with 42V load dump tolerance-validated for front-end automotive power rails. |
| EMI optimization | CISPR25 Class 5 compliant via symmetric VIN pinout, frequency spread spectrum (FSS), and mesh-connected flip-chip packaging. |
| Low-dropout operation | Supports high duty cycle (>90%) and dropout mode during cold-crank events down to 3.3V input without regulation loss. |
| Efficiency enhancement | Advanced Asynchronous Modulation (AAM) reduces IQ to 24µA and maintains >85% efficiency at 1mA load (VOUT=5V). |
| Protection suite | Includes hiccup-mode OCP (HS: 5.5–9.5A, LS: 4–6.8A), thermal shutdown (155–185°C), and precise UVLO/OVP thresholds. |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head-unit systems with variable battery voltage and strict EMI limits. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic and interface I/O with AEC-Q100 reliability. Use Value: 2.2MHz switching enables compact 1µH inductors; CISPR25 Class 5 compliance eliminates external EMI filters. |
Use Scenario: Supplying image sensor, ISP, and SerDes in rear-view or surround-view camera ECUs operating near engine heat sources. IC Role / Device Role / Timing Role: High-temp-stable 3.3V rail generator with thermal shutdown and cold-crank support. Use Value: –40°C to +150°C operation and 150°C thermal shutdown ensure uninterrupted video stream during thermal stress. |
| Instrument Cluster | Industrial Vehicle Telematics |
|
Use Scenario: Delivering regulated 3.3V/5V to MCU, TFT backlight controller, and CAN transceivers in digital dashboards. IC Role / Device Role / Timing Role: Dual-rail power source with independent PG signaling for safe boot sequencing and fault isolation. Use Value: Dual VIN pins and wettable flanks ensure robust solder joint integrity during thermal cycling in dashboard environments. |
Use Scenario: Powering LTE/Wi-Fi modules, GPS receivers, and data loggers in heavy-duty truck telematics units exposed to wide ambient swings. IC Role / Device Role / Timing Role: Wide-input buck converter enabling direct battery connection without pre-regulator stage. Use Value: 3.3V–36V input range eliminates need for upstream 12V conditioning; 1μA shutdown extends backup battery life. |
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 |
|---|---|---|---|
| LM61480-Q1 | Higher 8A rating, fixed 500kHz/2.1MHz options only; no AAM mode; 2.1V min VIN | Better suited for higher-current ADAS domain controllers; lacks ultra-low-IQ sleep mode for always-on nodes | Select when >4A output or simpler frequency setup is required; avoid if cold-crank below 3.3V or sub-25µA IQ is critical |
| TPS62933-Q1 | 3A max, 1.8V–36V input, 15µA IQ in LP mode, but no wettable flanks or CISPR25 Class 5 validation | Targeted at lower-power instrument clusters; requires external EMI filtering for automotive EMC compliance | Choose for cost-sensitive, non-safety-critical interior modules where AEC-Q100 Grade 1 suffices but Class 5 EMI is not mandated |
Compared with LM61480-Q1 and TPS62933-Q1, MPQ4328GRE-AEC1-Z uniquely balances 4A capability, 1μA shutdown, AEC-Q100 Grade 1 + CISPR25 Class 5, and wettable-flank manufacturability-making it optimal for mid-power automotive subsystems demanding both efficiency and production reliability.
Availability
MPQ4328GRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and instrument clusters requiring stable component supply with full AEC-Q100 traceability and long-term automotive lifecycle support.
Supply support for MPQ4328GRE-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 MPQ4328 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-environment vehicle subsystems requiring high efficiency, ultra-low quiescent current, and robust EMI performance without external filtering.
FAQ
What is the minimum input voltage supported during cold-crank conditions?
The MPQ4328GRE-AEC1-Z supports a minimum input voltage of 3.3V with guaranteed regulation and dropout mode operation, enabling uninterrupted power delivery during automotive cold-crank events where battery voltage dips below 6V. Its UVLO rising threshold is 3.7V typical, with 750mV hysteresis to prevent oscillation.
How does the SYNC/MODE pin configure AAM versus FCCM operation?
Pulling SYNC/MODE ≤0.4V selects Advanced Asynchronous Modulation (AAM) for light-load efficiency; pulling ≥1.4V forces Continuous Conduction Mode (FCCM); floating defaults to AAM due to internal 100kΩ pull-down. External clock synchronization requires driving the pin with 200kHz–2.5MHz square wave.
Is the BIAS pin mandatory, and what happens if left unconnected?
Yes-the BIAS pin must be connected: to VOUT for 5V versions, or to a stable 5V source (or AGND for non-5V outputs). Leaving it floating violates absolute maximum ratings and risks unstable regulation or excessive IQ. With proper 5V bias, quiescent current drops to 3µA typical.
What thermal performance can be expected on a standard 4-layer PCB?
On an MPS EVB (2oz copper, 4-layer, 8.3cm × 8.3cm), θJA is 25.7°C/W and ΨJT is 2.2°C/W. At 4A load and 12V input, junction temperature rise is ~103°C above ambient-well within the 150°C max TJ limit. Thermal shutdown activates at 155–185°C with 20°C hysteresis.
Does the device support adjustable output voltages, and how is feedback configured?
Yes-the MPQ4328GRE-AEC1-Z supports adjustable outputs via external resistor divider on the FB pin. The internal reference is 0.800V ±6mV; VOUT = 0.8V × (1 + R1/R2). For fixed-output variants (e.g., MPQ4328GRE-5-AEC1-Z), FB is internally connected to VOUT and must be shorted externally.
What protection features are included, and how do they behave under fault?
Protections include hiccup-mode over-current (HS: 5.5–9.5A, LS: 4–6.8A), thermal shutdown (155–185°C), input UVLO/OVP, and zero-current detection. Under over-current, the device cycles on/off with ~500ms hiccup period until fault clears; thermal shutdown holds off until junction cools by 20°C.
Can the MPQ4328GRE-AEC1-Z be used in non-automotive industrial applications?
Yes-its 3.3V–36V input, –40°C to +150°C operation, and robust protections make it suitable for industrial motor drives, PoE-powered equipment, and railway electronics. However, AEC-Q100 qualification adds cost; for non-automotive use, the non-AEC MPQ4328-GRE-Z variant may be more economical.
MPQ4328GRE-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-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:
- 4A
- Frequency - Switching:
- 200kHz ~ 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:
- 14-QFN (4x4)
MPQ4328GRE-AEC1-Z FAQ
1.How can I place an order for MPQ4328GRE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4328GRE-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 MPQ4328GRE-AEC1-Z reliable?
The price and inventory of MPQ4328GRE-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 MPQ4328GRE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4328GRE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4328GRE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4328GRE-AEC1-Z?
MPQ4328GRE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4328GRE-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 MPQ4328GRE-AEC1-Z?
For technical support, including MPQ4328GRE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4328GRE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4328GRE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4328GRE-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 MPQ4328GRE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4328GRE-AEC1-Z?
All MPQ4328GRE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4328GRE-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 MPQ4328GRE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4328GRE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ4328GRE-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…
