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Monolithic Power Systems Inc. MPQ4346GLE-5-AEC1-Z
- Part No.:
- MPQ4346GLE-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 17-PowerVFQFN
- Datasheet:
-
MPQ4346GLE-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 3A 17QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ4346GLE-5-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter delivering 3A continuous output at fixed 5V, with 3.3V–36V input range, 1μA shutdown current, and configurable 350kHz–2.5MHz switching frequency. It integrates 60mΩ HS-FET and 35mΩ LS-FET, supports automotive cold-crank (3.1V) and 42V load dump, and operates from –40°C to +150°C junction temperature - deployed in ADAS power rails and infotainment domain controllers.
For engineers reviewing the MPQ4346GLE-5-AEC1-Z datasheet, MPQ4346GLE-5-AEC1-Z pinout, MPQ4346GLE-5-AEC1-Z application, or MPQ4346GLE-5-AEC1-Z equivalent, key selection criteria include its ultra-low quiescent current in sleep mode (3µA), AAM light-load efficiency optimization, open-drain PG monitoring, and QFN-17 wettable flank package for automotive-grade solder joint inspection.
Technical Context
The MPQ4346GLE-5-AEC1-Z employs zero-delay PWM control with internal high-side and low-side MOSFETs, enabling near-optimal transient response and stable regulation under dynamic load steps. Its advanced asynchronous modulation (AAM) dynamically scales switching frequency below 10mA load to minimize gate and switching losses while maintaining tight output regulation.
It features dual-mode operation: forced continuous conduction (FCCM) via SYNCIN/MODE high, and AAM/pulse-skipping via SYNCIN/MODE low. Thermal shutdown (150°C trip, 20°C hysteresis), hiccup over-current protection, and low-dropout mode ensure robust fault tolerance across automotive cold-crank and load-dump transients.
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 survival. |
| Output Voltage | Fixed 5.0V ±1.2% over –40°C to +150°C - enables direct powering of MCU cores, CAN transceivers, and sensor interfaces without external feedback resistors. |
| Continuous Output Current | 3A - sustains peak loads in ADAS camera modules and display backlight drivers without thermal derating on standard 4-layer EVB. |
| Quiescent Current | 3µA in sleep mode (AAM active, no load) - extends battery runtime in always-on vehicle networks (e.g., telematics wake-on-LIN). |
| Switching Frequency | Configurable 350kHz–2.5MHz via resistor on FREQ pin - allows EMI tuning and inductor size optimization (e.g., 2.2µH at 2.2MHz vs. 10µH at 410kHz). |
| Power Good Threshold | 94%–106% VOUT window with 50µs delay - provides reliable system reset signaling for microcontrollers during brown-out recovery. |
| Operating Junction Temp | –40°C to +150°C - validated for under-hood placement per AEC-Q100 Grade 1 requirements. |
Pinout & Package
MPQ4346GLE-5-AEC1-Z is housed in a wettable flank QFN-17 (3mm × 4mm) package, optimized for automated optical inspection (AOI) of solder joints in automotive PCB assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SS | Soft-start timing node - 10µA current source charges external capacitor to control inrush current ramp rate and prevent input voltage sag. |
| 2 | FREQ | Frequency configuration - resistor-to-ground sets fSW from 350kHz to 2.5MHz, enabling EMI spread-spectrum alignment and layout flexibility. |
| 3 | SYNCIN/MODE | Mode selection and synchronization input - pull low for AAM (light-load efficiency), high for FCCM (low-noise constant-frequency operation). |
| 4,11 | VIN | Main input supply - dual pins reduce IR drop and improve high-current path integrity for 36V transients. |
| 5,10 | PGND | Power ground return - separate from AGND to isolate switching noise from feedback and control circuitry. |
| 6 | BST | Bootstrap supply for HS-FET gate driver - requires ceramic capacitor between BST and SW to sustain 5V gate drive during 100% duty cycle. |
| 7,8 | SW | Switch node - connects internal HS/LS FETs; requires low-inductance layout and adjacent PGND pour for EMI suppression. |
| 9 | EN | Enable control - logic-compatible threshold (0.85V low, 1V high) enables precise power sequencing with MCU GPIO or PMIC rail controller. |
| 12 | SYNCO | Synchronized clock output - phase-aligned with internal oscillator or external SYNCIN, useful for multi-rail timing coordination. |
| 13 | PG | Open-drain power-good flag - requires external pull-up; asserts high only when VOUT remains within ±6% for >50µs, preventing false resets. |
| 14 | DNU | Do-not-use terminal - must be connected directly to VCC to ensure internal bias stability and avoid undefined behavior. |
| 15 | VCC | Bias supply for control circuitry - decoupled with ≥1µF X5R ceramic close to pin to maintain 5V regulation under fast load transients. |
| 16 | AGND | Analog ground reference - isolated return for feedback divider, soft-start, and PG comparator to minimize noise coupling. |
| 17 | VOUT | Regulated output sense point - connected directly to output capacitor to enable accurate remote sensing and minimize trace IR error. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with guaranteed operation from –40°C to +150°C TJ and 42V load dump survival. |
| Wettable flank QFN-17 package | Enables automated optical inspection (AOI) of side-wall solder joints, improving manufacturing yield and field reliability in automotive production. |
| Advanced Asynchronous Modulation (AAM) | Reduces light-load IQ to 3µA by skipping pulses and scaling fSW, extending battery life in always-on vehicle subsystems. |
| Zero-delay PWM control | Delivers <10µs load-step response time with minimal output voltage deviation, critical for real-time ADAS sensor power integrity. |
| Integrated 60mΩ HS / 35mΩ LS MOSFETs | Eliminates external power stage components, reduces BOM count, and improves thermal performance over discrete solutions. |
| Frequency Spread Spectrum (FSS) | Modulates fSW to lower peak EMI amplitude, helping meet CISPR-25 Class 5 radiated emissions limits without added shielding. |
Applications
| Automotive Instrument Clusters | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powering TFT LCD displays, touch controllers, and microcontrollers in digital dashboards exposed to wide ambient temperature swings and battery transients. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying core logic and display interface ICs with tight line/load regulation (<±0.1%) and fast transient recovery. Use Value: Low dropout mode maintains regulation down to 3.1V input during cold-crank, preventing cluster blackouts; PG signal triggers safe UI state save before shutdown. |
Use Scenario: Providing clean, stable 5V power to high-resolution image sensors and ISP processors in forward-facing cameras operating under engine bay heat. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator converting 12V battery to 5V, synchronized to system clock to suppress switching noise in analog video paths. Use Value: AAM mode achieves >85% efficiency at 10mA standby current, reducing thermal load; FSS lowers EMI interference with LVDS/MIPI clock recovery. |
| Automotive Infotainment Head Units | Telematics Control Units (TCU) |
Use Scenario: Delivering regulated 5V to audio codecs, USB PHYs, and application processors in center-stack systems subject to repeated ignition cycling and RF interference. IC Role / Device Role / Timing Role: Main system rail converter with programmable soft-start (via SS pin) to coordinate power-up sequencing with SoC and PMIC. Use Value: 1μA shutdown current enables <10µA system standby draw; SYNCO output synchronizes multiple DC/DC stages to avoid beat-frequency noise in audio band. |
Use Scenario: Powering cellular modems, GNSS receivers, and CAN FD controllers in always-connected TCUs requiring ultra-low quiescent consumption during sleep modes. IC Role / Device Role / Timing Role: Always-on auxiliary rail generator with PG monitoring to validate modem power integrity before initiating LTE/NR handshakes. Use Value: 3µA sleep-mode IQ extends battery backup duration during main-battery disconnect; hiccup OCP prevents latch-up during antenna surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4346JGLE-5-AEC1-Z | QFN-19 package with additional NC and SYNCIN-only pin; identical electrical specs and AEC-Q100 qualification. | Requires revised PCB layout due to different pin count and placement; no functional advantage for 5V fixed-output use. | Select only if legacy board design uses QFN-19 footprint or requires dedicated SYNCIN (not shared MODE function). |
| TPS62933QRGZTQ1 | 3.8V–32V input, 3A, 500kHz–2.2MHz, 2.5µA IQ in LP mode; smaller 2.5mm×3mm QFN but no wettable flank. | Lacks 42V load dump rating and cold-crank support below 3.8V; not AEC-Q100 Grade 1 (only Grade 2). | Consider for non-under-hood applications where footprint reduction outweighs automotive stress validation. |
Compared with MPQ4346JGLE-5-AEC1-Z, the MPQ4346GLE-5-AEC1-Z offers identical performance in a smaller QFN-17 footprint with wettable flanks for superior solder-joint inspection - whereas TPS62933QRGZTQ1 trades automotive ruggedness for compactness and slightly higher light-load IQ, limiting use to cabin-mounted modules.
Availability
MPQ4346GLE-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive instrument clusters, ADAS camera modules, infotainment head units, and telematics control units requiring stable component supply with AEC-Q100 compliance and long-term automotive lifecycle support.
Supply support for MPQ4346GLE-5-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 MPQ4346 series belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-temperature, high-reliability vehicle subsystems requiring AEC-Q100 qualification, ultra-low IQ, and integrated power FETs.
FAQ
What is the minimum input voltage required for regulation at 5V output?
The MPQ4346GLE-5-AEC1-Z maintains regulation down to 3.3V input under normal conditions, and supports automotive cold-crank events as low as 3.1V via low-dropout mode - verified across –40°C to +150°C junction temperature with no output collapse or UVLO triggering.
Does this part require an external feedback resistor network?
No. The MPQ4346GLE-5-AEC1-Z is a fixed 5V output variant; internal resistor divider sets VOUT, eliminating external feedback components and associated layout sensitivity - simplifying design and improving long-term accuracy stability.
How is the power good (PG) signal used in system-level fault handling?
The open-drain PG pin asserts high only when VOUT remains within 94%–106% of 5V for ≥50µs; it drives MCU reset inputs or PMIC enable chains, and its 50µs delay prevents false triggering during brief load transients or startup overshoot.
Can the switching frequency be synchronized to an external clock source?
Yes. Applying a clock signal to the SYNCIN/MODE pin synchronizes internal fSW to the external source within ±15% frequency tolerance; pulling the pin high enables FCCM mode, while pulling low activates AAM for light-load efficiency optimization.
What thermal performance can be expected on a standard 4-layer PCB?
On an MPS EVB (2oz copper, 8.3cm×8.3cm, 4-layer), the QFN-17 package delivers θJA = 29.2°C/W; at 3A load and 12V input, case temperature rise is ≤25°C - well within AEC-Q100 Grade 1 thermal limits without forced airflow.
Is the BST capacitor value dependent on input voltage or switching frequency?
Yes. The BST capacitor must supply gate charge for the HS-FET during each cycle; recommended value is 0.1µF X5R ceramic, placed adjacent to BST/SW pins - larger values (e.g., 0.22µF) improve margin under 36V VIN or 2.5MHz fSW with high-duty-cycle operation.
What protection features are implemented to handle automotive transients?
The device integrates 42V input overvoltage protection (OVP), thermal shutdown (150°C trip, 20°C hysteresis), hiccup-mode over-current protection, and undervoltage lockout (UVLO) with 200mV hysteresis - all qualified per AEC-Q100 stress test conditions for sustained reliability.
MPQ4346GLE-5-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):
- 5V
- Voltage - Output (Max):
- -
- 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:
- 17-QFN (3x4)
MPQ4346GLE-5-AEC1-Z FAQ
1.How can I place an order for MPQ4346GLE-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4346GLE-5-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 MPQ4346GLE-5-AEC1-Z reliable?
The price and inventory of MPQ4346GLE-5-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 MPQ4346GLE-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4346GLE-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4346GLE-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4346GLE-5-AEC1-Z?
MPQ4346GLE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4346GLE-5-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 MPQ4346GLE-5-AEC1-Z?
For technical support, including MPQ4346GLE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4346GLE-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4346GLE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4346GLE-5-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 MPQ4346GLE-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4346GLE-5-AEC1-Z?
All MPQ4346GLE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4346GLE-5-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 MPQ4346GLE-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4346GLE-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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