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Monolithic Power Systems Inc. MPQ4347GLE-37-AEC1-Z
- Part No.:
- MPQ4347GLE-37-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 17-PowerVFQFN
- Datasheet:
-
MPQ4347GLE-37-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.7V 4A 17QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ4347GLE-37-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, 36V input, 4A synchronous step-down DC/DC converter with fixed 3.7V output, ultra-low 1µA shutdown current, and configurable 350kHz–2.5MHz switching frequency. It integrates 60mΩ high-side and 35mΩ low-side MOSFETs, supports automotive cold-crank (3.1V) and 42V load dump, and delivers power-good signaling and thermal shutdown for automotive infotainment and ADAS power rails.
For engineers reviewing the MPQ4347GLE-37-AEC1-Z datasheet, MPQ4347GLE-37-AEC1-Z pinout, MPQ4347GLE-37-AEC1-Z application, or MPQ4347GLE-37-AEC1-Z equivalent, key selection criteria include its AEC-Q100 qualification, 3.7V fixed output accuracy (±1% over –40°C to +150°C), QFN-17 (3mm×4mm) wettable flank package, and support for AAM/FCCM modes to optimize light-load efficiency in battery-sensitive automotive systems.
Technical Context
The MPQ4347GLE-37-AEC1-Z implements zero-delay PWM control with internal HS/LS FETs and a dedicated bootstrap circuit (BST–SW) for high-side gate drive. Its dual-mode operation-Advanced Asynchronous Modulation (AAM) for light-load efficiency and Forced Continuous Conduction Mode (FCCM) for low-noise regulation-is selected via the SYNCIN/MODE pin.
It features integrated protections including cycle-by-cycle over-current detection (HS limit: 7.7A typ, LS valley limit: 5.9A typ), thermal shutdown at 150°C with 20°C hysteresis, and precise power-good monitoring (94–106% VOUT window). The device maintains stable regulation under wide VIN (3.3V–36V), supports external synchronization, and includes soft-start (10µA SS current) and low-dropout operation during cold-crank.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - accommodates full automotive battery range including cold-crank (3.1V supported) and 42V load dump transients |
| Output Voltage | Fixed 3.7V ±1% (3620–3780 mV) - factory-trimmed for precision without external feedback resistors |
| Continuous Output Current | 4A - delivered with integrated 60mΩ HS and 35mΩ LS MOSFETs, enabling compact layout and reduced BOM count |
| Quiescent Current | 1µA in shutdown, 3µA in sleep mode - extends battery life in always-on automotive modules |
| Switching Frequency | Configurable 350kHz–2.5MHz via FREQ pin resistor - enables EMI optimization and inductor size trade-offs |
| Power Good Threshold | 94–106% of nominal VOUT - open-drain PG signal provides reliable system power sequencing and fault indication |
| Junction Temperature Range | –40°C to +150°C - validated for under-hood automotive environments per AEC-Q100 Grade 1 |
Pinout & Package
MPQ4347GLE-37-AEC1-Z is housed in a thermally enhanced QFN-17 (3mm × 4mm) package with wettable flanks for automated optical inspection (AOI) and improved solder joint reliability in automotive production.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| SS (Pin 1) | Soft-start timing input | 10µA current source charges external capacitor to ramp up reference voltage and limit inrush current during startup |
| FREQ (Pin 2) | Frequency configuration | Resistor-to-ground sets fSW between 350kHz and 2.5MHz; enables EMI tuning and inductor selection flexibility |
| SYNCIN/MODE (Pin 3) | Mode selection & sync input | Pull low for AAM (pulse-skipping), pull high for FCCM; accepts external clock for system-wide switching synchronization |
| VIN (Pins 4, 11) | Main input supply | Accepts 3.3–36V; powers internal circuitry and high-side switch; requires local ceramic decoupling |
| PGND (Pins 5, 10) | Power ground return | Low-impedance path for high-current switch node return; must be connected to PCB power plane with minimal trace inductance |
| BST (Pin 15) | Bootstrap supply | Charges boot capacitor between BST and SW to drive high-side MOSFET gate above VIN; critical for 100% duty cycle capability |
| SW (Pins 7, 8) | Switch node | Drives external inductor; connects internally to HS/LS FETs; requires tight layout to minimize ringing and EMI |
| EN (Pin 9) | Enable control | Active-high logic input (1V threshold); enables/disables regulator with 1µA shutdown current when pulled low |
| PG (Pin 13) | Power-good indicator | Open-drain output signals valid regulation (94–106% VOUT); requires external pull-up for microcontroller reset or sequencing |
| DNU (Pin 14) | Do Not Use | Must be connected directly to VCC; floating or incorrect connection may cause functional instability |
| VCC (Pin 17) | Bias supply | Internal 5V LDO output; powers gate drivers and control logic; requires 1µF ceramic capacitor to AGND |
| AGND (Pin 16) | Analog ground | Reference for feedback, PG, and internal comparators; must be separated from PGND and tied at single point |
| VOUT (Pin 12) | Output regulation point | Direct connection to output capacitor; used as feedback sense point for fixed-output version's internal reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with operating junction temperature up to +150°C and robust stress testing |
| Wettable flank QFN-17 package | Enables automated optical inspection (AOI) of solder joints, improving manufacturing yield and field reliability |
| Configurable spread-spectrum modulation | Reduces peak EMI emissions to meet CISPR25 Class 5 requirements without added shielding or filtering |
| Low-dropout (LDO) mode | Maintains regulation down to VIN = VOUT + ~0.2V during cold-crank, preventing system brownout below 3.1V |
| Zero-delay PWM control | Minimizes transient response time for fast load steps typical in ADAS camera or radar power domains |
| Thermal shutdown with hysteresis | Shuts down at 150°C and restarts only after cooling by 20°C, preventing thermal cycling damage in enclosed enclosures |
Applications
| Automotive Instrument Clusters | ADAS Camera Modules |
|---|---|
Use Scenario: Powering TFT-LCD display, microcontroller, and CAN transceiver in digital dashboard under varying battery conditions. IC Role / Device Role / Timing Role: Primary 3.7V buck regulator supplying core logic and display bias rails with AEC-Q100 compliance and cold-crank support. Use Value: Eliminates need for external LDO post-regulator due to ±1% output accuracy and <0.1% load regulation, reducing board space and cost. | Use Scenario: Providing clean, efficient 3.7V power to image sensor and ISP in forward-facing camera systems. IC Role / Device Role / Timing Role: High-efficiency synchronous buck delivering 4A peak current with low EMI for noise-sensitive analog imaging paths. Use Value: Spread-spectrum and symmetric VIN pinout reduce conducted/radiated emissions, easing CISPR25 Class 5 certification. |
| Automotive Infotainment Head Units | Industrial Vehicle Telematics |
Use Scenario: Supplying 3.7V to application processor, audio codec, and USB PHY in head unit mainboard. IC Role / Device Role / Timing Role: Main system PMIC buck stage with programmable soft-start and power-good sequencing for multi-rail SoC startup. Use Value: 1µA shutdown current extends battery backup runtime during vehicle sleep mode, meeting OEM quiescent power targets. | Use Scenario: Powering GPS/GNSS module, cellular modem, and MCU in fleet management telematics units deployed in harsh environments. IC Role / Device Role / Timing Role: Robust 36V-input buck converter supporting wide industrial input ranges and extended temperature operation. Use Value: 42V load dump tolerance and –40°C to +150°C operation ensure uninterrupted connectivity in extreme ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4347JGLE-37-AEC1-Z | QFN-19 (3mm×4mm) with wettable flanks; identical electrical specs but adds NC pin and SYNCO output | Required where board-level AOI mandates full perimeter wettable flanks and external clock distribution is needed | Select when SYNCO functionality or enhanced solder-joint inspection is mandatory; otherwise MPQ4347GLE-37-AEC1-Z offers same performance in smaller footprint |
| TPS543320RTWR | 4A, 3.3–36V input, but fixed 3.3V output only; no AEC-Q100 qualification; uses different control architecture (D-CAP3) | Suitable for non-automotive industrial applications where AEC-Q100 is not required and 3.3V output suffices | Choose only for cost-sensitive non-automotive designs; lacks automotive qualification, 3.7V option, and wettable flank packaging |
Compared with MPQ4347JGLE-37-AEC1-Z, the subject part saves PCB area with QFN-17 while retaining identical regulation, protection, and thermal specs; versus TPS543320RTWR, it delivers automotive-grade reliability, exact 3.7V output, and wettable flanks essential for automotive manufacturing.
Availability
MPQ4347GLE-37-AEC1-Z is available at Aetrix Electronics and suitable for automotive instrument clusters, ADAS camera modules, infotainment head units, and industrial telematics requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for MPQ4347GLE-37-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 MPQ4347 product line is engineered specifically for automotive power conversion, emphasizing AEC-Q100 qualification, ultra-low IQ, wide input range, and EMI robustness for safety-critical subsystems like ADAS and digital cockpits.
FAQ
What is the maximum allowable input voltage for MPQ4347GLE-37-AEC1-Z, and how does it handle transients?
The absolute maximum input voltage is +42V, enabling survival of ISO 7637-2 Load Dump pulses common in 12V automotive systems. The device operates continuously from 3.3V to 36V, with built-in over-voltage protection triggering at 36–40V (rising threshold) and 10V hysteresis to prevent nuisance tripping during normal transients.
Does MPQ4347GLE-37-AEC1-Z require external feedback resistors for its 3.7V output?
No. This is a fixed-output variant: the 3.7V regulation is achieved via internal trimming during wafer sort, eliminating external feedback resistors. The VOUT pin connects directly to the output capacitor, simplifying layout and improving accuracy stability across temperature (±1% from –40°C to +150°C).
How does the AAM mode improve light-load efficiency compared to FCCM?
In AAM mode (enabled by pulling SYNCIN/MODE low), the regulator skips switching cycles under light loads, reducing gate-driving and switching losses. This achieves >85% efficiency at 1mA load (vs. ~65% in FCCM), extending battery life in always-on automotive modules such as CAN wake-up receivers.
What is the purpose of the DNU pin, and what happens if it is left unconnected?
Pin 14 (DNU) is a "Do Not Use" terminal that must be connected directly to VCC. Leaving it floating violates the internal bias network, potentially causing erratic enable behavior, unstable regulation, or failure to start. This requirement is explicitly stated in the datasheet and verified in MPS application notes.
Can MPQ4347GLE-37-AEC1-Z synchronize to an external clock, and what is the acceptable frequency range?
Yes - applying a clock signal to the SYNCIN/MODE pin synchronizes the internal oscillator. The accepted range is 90–115% of the free-running frequency set by the FREQ resistor, allowing tight phase alignment with system clocks for EMI reduction and noise cancellation in multi-rail designs.
Is thermal performance validated for continuous 4A operation in the QFN-17 package?
Yes - with a 4-layer 2oz copper evaluation board (8.3cm × 8.3cm), the QFN-17 package achieves θJA = 29.2°C/W. At 4A and 12V input, typical power dissipation is ~1.2W, resulting in ~35°C case rise above ambient - well within the 150°C junction limit even at +85°C ambient.
What is the minimum on-time specification, and why is it critical for high VIN/VOUT ratios?
The minimum on-time is 20ns (typical), enabling stable operation at high step-down ratios - e.g., converting 36V to 3.7V (9.7:1) at 2.2MHz requires only ~11% duty cycle (~50ns on-time), which remains well above the 20ns limit, ensuring regulation integrity and transient response.
MPQ4347GLE-37-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 17-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):
- 3.7V
- Voltage - Output (Max):
- -
- Current - Output:
- 4A
- 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:
- 17-QFN (3x4)
MPQ4347GLE-37-AEC1-Z FAQ
1.How can I place an order for MPQ4347GLE-37-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4347GLE-37-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 MPQ4347GLE-37-AEC1-Z reliable?
The price and inventory of MPQ4347GLE-37-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 MPQ4347GLE-37-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4347GLE-37-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4347GLE-37-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4347GLE-37-AEC1-Z?
MPQ4347GLE-37-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4347GLE-37-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 MPQ4347GLE-37-AEC1-Z?
For technical support, including MPQ4347GLE-37-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4347GLE-37-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4347GLE-37-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4347GLE-37-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 MPQ4347GLE-37-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4347GLE-37-AEC1-Z?
All MPQ4347GLE-37-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4347GLE-37-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 MPQ4347GLE-37-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4347GLE-37-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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