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Monolithic Power Systems Inc. MPQ4346GLE-5-AEC1-P
- Part No.:
- MPQ4346GLE-5-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 17-PowerVFQFN
- Datasheet:
-
MPQ4346GLE-5-AEC1-P.pdf
- Description:
- IC REG BUCK 5V 3A 17QFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
MPQ4346GLE-5-AEC1-P 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 cold-crank (3.1V) and 42V load dump, and is deployed in automotive infotainment power rails.
For engineers reviewing the MPQ4346GLE-5-AEC1-P datasheet, MPQ4346GLE-5-AEC1-P pinout, MPQ4346GLE-5-AEC1-P application, or MPQ4346GLE-5-AEC1-P equivalent, key selection criteria include ultra-low quiescent current in sleep mode (3µA), AAM/FCCM mode flexibility, PG monitoring accuracy (±3%), thermal performance up to +150°C junction, and wettable flank QFN-17 package for automated optical inspection.
Technical Context
The MPQ4346GLE-5-AEC1-P 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 under light loads to minimize gate and switching losses.
It features symmetric VIN pinout, frequency spread spectrum (FSS), and CISPR25 Class 5 compliance for robust EMC/EMI performance in noisy automotive environments. The device enters low-dropout mode during cold-crank and includes hiccup over-current protection, thermal shutdown (150°C), and precise power-good monitoring with 94%–106% window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (3.1V) and 42V load dump transients |
| Output Voltage | Fixed 5.0V ±1.2% - factory-trimmed accuracy ensures stable MCU/SOC core rail without external feedback resistors |
| Continuous Output Current | 3A - sustained delivery with integrated 60mΩ HS-FET and 35mΩ LS-FET enables compact layout and reduced thermal derating |
| Quiescent Current | 3µA in sleep mode - extends battery life in always-on automotive modules such as telematics and ADAS sensors |
| Switching Frequency | Configurable 350kHz–2.5MHz via resistor on FREQ pin - allows EMI optimization and inductor size trade-offs |
| Operating Junction Temp | −40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard applications |
| Power Good Accuracy | ±3% window (94–106% VOUT) - provides reliable system reset and sequencing control for downstream logic |
Pinout & Package
MPQ4346GLE-5-AEC1-P uses a wettable flank QFN-17 (3mm × 4mm) package with exposed thermal pad. Pin numbering follows top-view orientation per MPS datasheet Rev. 1.0.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SS | Soft-start timing node - 10µA current source charges external capacitor to control inrush current ramp rate |
| 2 | FREQ | Frequency configuration - resistor-to-ground sets fSW from 350kHz to 2.5MHz for EMI tuning |
| 3 | SYNCIN/MODE | Mode selection and synchronization input - pull low for AAM, high for FCCM, or drive with external clock |
| 4, 11 | VIN | Main input supply - dual pins reduce impedance and improve decoupling for high di/dt switching currents |
| 5, 10 | PGND | Power ground return - dedicated path for high-current switch node loop minimizes noise coupling into analog circuitry |
| 6 | BST | Bootstrap supply for HS-FET driver - requires ceramic capacitor between BST and SW to sustain gate drive above VIN |
| 7, 8 | SW | Switch node - connects internal HS/LS FETs; must be routed with minimal loop area for EMI and efficiency |
| 9 | EN | Enable control - active-high with 0.85V–1.05V hysteresis; direct microcontroller GPIO interface without level-shifting |
| 12 | SYNCO | Synchronized clock output - phase-aligned signal for multi-regulator timing coordination or daisy-chained sync |
| 13 | PG | Open-drain power-good indicator - requires external pull-up; asserts only when VOUT is within ±3% of 5V |
| 14 | DNU | Do-not-use terminal - must be connected directly to VCC to ensure proper internal biasing |
| 15 | VCC | Bias supply for control circuitry - decoupled with ≥1µF ceramic cap close to pin for stable gate driver operation |
| 16 | AGND | Analog ground reference - isolated from PGND to prevent noise injection into feedback and soft-start circuits |
| 17 | VOUT | Regulated output sense point - direct connection to output capacitor improves load regulation and transient response |
Key Features
| Feature | Design Value |
|---|---|
| Wettable Flank QFN-17 | Enables automated optical inspection (AOI) of solder joints for automotive-grade process traceability |
| Advanced Asynchronous Modulation (AAM) | Reduces light-load IQ to 3µA while maintaining regulation, extending battery runtime in parked-mode systems |
| Zero-Delay PWM Control | Delivers <10µs response to load steps - critical for powering real-time ADAS vision processors |
| 42V Load Dump Survival | Withstands ISO 7637-2 Pulse 5a transients without external TVS, simplifying front-end protection design |
| Low-Dropout Mode | Maintains regulation down to VIN = 5.2V at 3A - sustains operation during automotive cold-crank events |
| CISPR25 Class 5 Compliance | Meets stringent automotive EMI limits without added shielding or ferrites, reducing BOM cost and board space |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
Use Scenario: Primary 5V rail for SoC, display interface, and audio codec in centralized head unit designs. IC Role / Device Role / Timing Role: Main buck regulator supplying core logic voltage with tight line/load regulation and fast transient recovery. Use Value: 3A capability and ±1.2% output accuracy eliminate need for post-regulation LDOs, reducing thermal overhead and component count. |
Use Scenario: Powering image sensor, ISP, and serial link (e.g., MIPI) in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter with PG monitoring for safe boot and fault reporting. Use Value: AAM mode achieves <10µA total system standby current; PG signal enables firmware-controlled power sequencing and diagnostics. |
| Automotive Digital Cluster | Telematics Control Unit (TCU) |
Use Scenario: Supplying 5V to microcontroller, TFT backlight driver, and CAN transceivers in instrument clusters. IC Role / Device Role / Timing Role: Automotive-grade buck converter with thermal shutdown and hiccup OCP for unattended long-term reliability. Use Value: −40°C to +150°C operation and AEC-Q100 qualification ensure functional safety compliance without derating. |
Use Scenario: Always-on 5V rail for cellular modem, GNSS receiver, and secure element in vehicle connectivity modules. IC Role / Device Role / Timing Role: Ultra-low-IQ buck converter enabling >10-year battery backup life in disconnected state. Use Value: 1µA shutdown current and 3µA sleep current meet OEM requirements for low-power telematics wake-on-event architectures. |
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-P | QFN-19 package with extra NC and SYNCIN pins; identical electrical specs and AEC-Q100 Grade 1 rating | Supports more complex sync configurations and offers marginally improved thermal resistance (θJC = 5.17°C/W vs. 5.2°C/W) | Select when requiring external clock synchronization or enhanced thermal margin in high-ambient environments |
| TPS62933-Q1 | 3.3V–36V input, 3A, 5V fixed output; lower IQ (2.5µA sleep), but no FSS or CISPR25 Class 5 certification | Lacks automotive EMI hardening; requires external filtering for Class 5 compliance in harsh RF environments | Prefer for non-safety-critical cabin modules where EMI constraints are relaxed and lowest possible IQ is prioritized |
Compared with MPQ4346JGLE-5-AEC1-P, the MPQ4346GLE-5-AEC1-P offers identical regulation performance in a smaller footprint, while TPS62933-Q1 trades EMI robustness for marginal IQ reduction - making the MPQ4346GLE-5-AEC1-P optimal for space-constrained, EMI-sensitive automotive domains.
Availability
MPQ4346GLE-5-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, digital instrument clusters, and telematics control units requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MPQ4346GLE-5-AEC1-P 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 over two decades of leadership in DC/DC conversion, motor drivers, and automotive-grade solutions.
The MPQ4346 series belongs to MPS's AEC-Q100-qualified automotive power portfolio, designed specifically for demanding 12V/24V vehicle subsystems requiring ultra-low IQ, high efficiency, and robust transient immunity.
FAQ
What is the minimum input voltage required for regulation at full 3A load?
The MPQ4346GLE-5-AEC1-P maintains regulation down to VIN = 5.2V at 3A output in low-dropout mode, verified per datasheet Figure 23 (VOUT vs. VIN). This enables uninterrupted operation during automotive cold-crank events where battery voltage dips to 3.1V - the device sustains 5V output as long as VIN remains ≥5.2V under full load.
Does this part require an external feedback resistor network?
No. MPQ4346GLE-5-AEC1-P is a fixed 5V output variant with internal resistor divider; no external feedback components are needed. The output voltage is factory-trimmed to ±1.2% accuracy over temperature (−40°C to +150°C), eliminating layout sensitivity and calibration overhead.
How is the power-good (PG) signal used in system-level sequencing?
The open-drain PG pin asserts high only when VOUT is within 94%–106% of 5V (i.e., 4.7V–5.3V). It drives downstream enable inputs or microcontroller GPIOs to confirm stable power before releasing reset or initiating firmware execution - ensuring deterministic boot behavior in automotive ECUs.
Can the switching frequency be synchronized to an external clock?
Yes. Driving the SYNCIN/MODE pin with an external clock (90–115% of freerunning fSW) synchronizes internal operation. Alternatively, pulling SYNCIN/MODE high forces FCCM mode; pulling low enables AAM. No external components are required beyond the clock source or pull-up/down resistors.
What thermal performance can be expected on a standard 4-layer PCB?
On an MPS EVB (2oz copper, 8.3cm × 8.3cm, 4-layer), θJA is 29.2°C/W. At 3A and 12V input, typical case temperature rise is <15°C above ambient - verified in datasheet Figure 31. Thermal shutdown activates at 150°C junction, with 20°C hysteresis for reliable fault recovery.
Is the BST capacitor value dependent on switching frequency?
Yes. The BST capacitor must supply charge to the HS-FET gate driver each cycle. For 2.2MHz operation, a 0.1µF X7R ceramic capacitor is recommended (per datasheet Section 36); for 410kHz, 0.22µF is typical. Insufficient capacitance causes bootstrap undervoltage and HS-FET dropout.
Does this device support forced continuous conduction mode (FCCM) at light loads?
Yes. Pulling SYNCIN/MODE high forces FCCM, eliminating pulse-skipping and maintaining constant fSW. This reduces output voltage ripple and avoids audible noise - ideal for powering sensitive analog or RF circuits in infotainment systems.
MPQ4346GLE-5-AEC1-P 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-P FAQ
1.How can I place an order for MPQ4346GLE-5-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4346GLE-5-AEC1-P 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-P reliable?
The price and inventory of MPQ4346GLE-5-AEC1-P 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-P is usually 5 days.
3.What payment methods are accepted for MPQ4346GLE-5-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4346GLE-5-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4346GLE-5-AEC1-P?
MPQ4346GLE-5-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4346GLE-5-AEC1-P 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-P?
For technical support, including MPQ4346GLE-5-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4346GLE-5-AEC1-P requirements.
6.How does Aetrix verify that MPQ4346GLE-5-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4346GLE-5-AEC1-P 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-P meets industry standards.
7.What is the process for return or replacement of MPQ4346GLE-5-AEC1-P?
All MPQ4346GLE-5-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4346GLE-5-AEC1-P, 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-P part is unused and in its original packaging.
Return procedure for MPQ4346GLE-5-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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