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Monolithic Power Systems Inc. MPQ4346GLE-33-AEC1-P
- Part No.:
- MPQ4346GLE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 17-PowerVFQFN
- Datasheet:
-
MPQ4346GLE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 3A 17QFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
MPQ4346GLE-33-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter delivering 3A continuous output at fixed 3.3V with ultra-low 1µA shutdown quiescent current, 350kHz–2.5MHz configurable switching frequency, and integrated 60mΩ HS-FET / 35mΩ LS-FET - designed for automotive infotainment power rails under cold-crank (3.1V) and load-dump (42V) conditions.
For engineers reviewing the MPQ4346GLE-33-AEC1-P datasheet, MPQ4346GLE-33-AEC1-P pinout, MPQ4346GLE-33-AEC1-P application, or MPQ4346GLE-33-AEC1-P equivalent, key selection criteria include its wettable-flank QFN-17 package, ±1% output voltage accuracy over –40°C to +150°C, zero-delay PWM control for transient response, and AAM/FCCM mode selection via SYNCIN/MODE pin.
Technical Context
The MPQ4346GLE-33-AEC1-P implements a fixed-frequency, zero-delay PWM architecture with internal high-side and low-side MOSFETs, enabling near-optimal load-transient response in automotive systems. Its configurable fSW (350kHz–2.5MHz) supports EMI optimization and layout flexibility across diverse PCB stackups.
It integrates advanced thermal management features including thermal shutdown (150°C), hiccup-mode over-current protection, and low-dropout operation during cold-crank - all validated per AEC-Q100 Grade 1 requirements for junction temperatures from –40°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% (3230–3370 mV) over full temperature range - ensures stable MCU/SoC core rail compliance. |
| Input Voltage Range | 3.3V to 36V with 42V load-dump survival - supports 12V/24V automotive battery systems including transients. |
| Continuous Output Current | 3A at ambient ≤85°C - sufficient for powering ADAS sensors, display controllers, or audio DSPs. |
| Quiescent Current | 1µA in shutdown, 3µA in sleep mode - extends battery life in always-on vehicle modules. |
| Switching Frequency | Configurable 350kHz–2.5MHz via external resistor - enables EMI tuning and inductor size optimization. |
| Thermal Protection | Thermal shutdown at 150°C with 20°C hysteresis - prevents permanent damage during sustained overload. |
| Power Good Accuracy | PG asserts when VOUT is within 94–106% of nominal - provides reliable system reset signaling. |
Pinout & Package
MPQ4346GLE-33-AEC1-P uses a wettable-flank QFN-17 (3mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and solder joint reliability in automotive production.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SS | Soft-start timing input - sets ramp time via external capacitor to limit inrush current. |
| 2 | FREQ | Switching frequency configuration - resistor-to-ground selects fSW from 350kHz to 2.5MHz. |
| 3 | SYNCIN/MODE | External clock sync input or AAM/FCCM mode selector - pull low for light-load efficiency, high for forced CCM. |
| 4,11 | VIN | Main input supply - powers control circuitry and high-side FET; requires local ceramic decoupling. |
| 5,10 | PGND | Power ground return path - must be connected to low-impedance ground plane beneath IC. |
| 6 | BST | Bootstrap supply for high-side gate driver - requires 0.1µF ceramic capacitor to SW pin. |
| 7,8 | SW | Switch node - connects internal HS/LS FETs; critical for EMI and thermal layout. |
| 9 | EN | Enable control - logic-high (>1V) enables regulation; <0.85V disables with 1µA shutdown current. |
| 12 | SYNCO | Synchronized clock output - phase-aligned with internal oscillator or external sync source. |
| 13 | PG | Open-drain power-good indicator - requires external pull-up; signals VOUT in 94–106% window. |
| 14 | DNU | Do-not-use pin - must be tied directly to VCC per datasheet to avoid malfunction. |
| 15 | VCC | Bias supply for internal circuitry - requires 1µF ceramic decoupling to AGND. |
| 16 | AGND | Analog ground reference - separate from PGND to minimize noise coupling into feedback path. |
| 17 | VOUT | Regulated output sense point - connect directly to 3.3V rail; forms feedback loop with internal divider. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +150°C junction temperature with full reliability testing. |
| Wettable flank QFN-17 package | Enables AOI-compatible solder joint inspection - critical for zero-defect automotive manufacturing. |
| Advanced Asynchronous Modulation (AAM) | Reduces light-load IQ to 3µA while maintaining regulation - extends battery runtime in standby modes. |
| Frequency Spread Spectrum (FSS) | Integrated EMI reduction technique - helps meet CISPR-25 Class 5 radiated emissions limits. |
| Symmetric VIN pinout | Minimizes high-di/dt loop area - reduces switching noise injection into sensitive analog sections. |
| Low-dropout mode | Maintains regulation down to VIN = VOUT + 0.3V - supports cold-crank operation at 3.1V input. |
Applications
| Automotive Instrument Clusters | ADAS Camera Modules |
|---|---|
Use Scenario: Powering TFT-LCD display drivers and microcontroller cores in digital dashboards subject to wide input transients. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying processor I/O and display interface rails. Use Value: 42V load-dump tolerance and –40°C to +150°C operation ensure uninterrupted functionality during engine cranking and under-hood thermal stress. |
Use Scenario: Providing clean, regulated 3.3V to image signal processors and MIPI CSI-2 serializers in surround-view camera ECUs. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter with fast transient response for burst-mode imaging loads. Use Value: Zero-delay PWM control and 20ns minimum on-time enable stable regulation during rapid current steps from sensor readout cycles. |
| Automotive Infotainment Head Units | Telematics Control Units (TCUs) |
Use Scenario: Generating 3.3V for application processors, audio codecs, and USB PHYs in head units with always-on connectivity. IC Role / Device Role / Timing Role: Main system power rail converter supporting both active and low-power sleep states. Use Value: 1µA shutdown current and AAM mode reduce parasitic drain - critical for maintaining battery health during extended parking periods. |
Use Scenario: Supplying 3.3V to cellular modems, GNSS receivers, and CAN FD controllers in vehicle telematics gateways. IC Role / Device Role / Timing Role: Robust front-end regulator handling wide-input automotive battery variations and RF noise immunity. Use Value: CISPR-25 Class 5 compliance and FSS modulation ensure coexistence with sensitive RF subsystems without added shielding cost. |
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-33-AEC1-P | QFN-19 package with additional NC pins; identical electrical specs and AEC-Q100 qualification. | Requires different PCB footprint and stencil design; no functional difference in performance or thermal behavior. | Select when board layout accommodates larger QFN-19 or when pin redundancy is desired for prototyping flexibility. |
| TI LM61460-Q1 | 3.3V fixed-output variant; 36V max VIN, 3.5A rating, but higher 12µA shutdown IQ and no wettable flank option. | Lacks wettable flank and fails CISPR-25 Class 5 without external filtering; lower thermal performance in QFN-16 package. | Choose only if existing TI ecosystem integration outweighs MPS's superior EMI performance and AOI capability. |
Compared with MPQ4346JGLE-33-AEC1-P, the MPQ4346GLE-33-AEC1-P offers identical regulation performance in a smaller QFN-17 footprint with wettable flanks for enhanced process control; versus LM61460-Q1, it delivers 12× lower shutdown IQ and built-in CISPR-25 Class 5 compliance without external components.
Availability
MPQ4346GLE-33-AEC1-P 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 full AEC-Q100 traceability and long-term automotive lifecycle support.
Supply support for MPQ4346GLE-33-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 expertise in DC-DC conversion, motor drivers, and automotive-grade solutions.
The MPQ4346 series belongs to MPS's automotive-qualified buck converter product line, engineered specifically for harsh-environment applications demanding AEC-Q100 compliance, ultra-low IQ, and robust EMI performance in space-constrained layouts.
FAQ
What is the maximum allowable input voltage for MPQ4346GLE-33-AEC1-P during load dump events?
The device withstands up to +42V on the VIN pin during load dump transients, as specified in the Absolute Maximum Ratings table. This rating is validated per ISO 7637-2 Pulse 5a and ensures reliable operation without external TVS clamping in most 12V automotive systems.
Does MPQ4346GLE-33-AEC1-P require an external feedback resistor network?
No - it is a fixed 3.3V output device with internal resistor divider. The FB pin is not exposed; output voltage is trimmed at wafer test and guaranteed to ±1% over temperature, eliminating external component count and layout sensitivity.
How does the DNU pin function, and what happens if left unconnected?
Pin 14 (DNU) must be connected directly to VCC. Leaving it floating violates the recommended operating conditions and may cause undefined behavior, including startup failure or erratic regulation - this requirement is explicitly stated in the Pin Functions table on page 5 of the datasheet.
Can MPQ4346GLE-33-AEC1-P operate in forced continuous conduction mode (FCCM)?
Yes - driving the SYNCIN/MODE pin high (≥1.8V) forces FCCM operation, eliminating pulse-skipping and ensuring constant switching frequency for predictable EMI and reduced output voltage ripple at light loads.
What is the thermal resistance (θJA) of the QFN-17 package under standard JEDEC 4-layer board conditions?
Measured per JESD51-7 on a 4-layer board, θJA is 44.7°C/W. On MPS's EVB (2oz copper, 8.3cm × 8.3cm), it improves to 29.2°C/W - enabling 3A continuous output at ambient ≤85°C with appropriate PCB copper area.
Is the PG signal actively driven or open-drain, and what pull-up voltage is recommended?
PG is an open-drain output requiring an external pull-up resistor. The recommended pull-up voltage matches the system's logic rail (e.g., 3.3V or 5V), with typical values between 10kΩ and 100kΩ - ensuring fast rise/fall times while minimizing current draw during fault conditions.
Does MPQ4346GLE-33-AEC1-P support synchronization to an external clock source?
Yes - applying a clock signal to the SYNCIN/MODE pin synchronizes the internal oscillator to the external frequency (±15% range), enabling multi-rail phase alignment and deterministic EMI reduction in complex automotive power systems.
MPQ4346GLE-33-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):
- 3.3V
- 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-33-AEC1-P FAQ
1.How can I place an order for MPQ4346GLE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4346GLE-33-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-33-AEC1-P reliable?
The price and inventory of MPQ4346GLE-33-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-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4346GLE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4346GLE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4346GLE-33-AEC1-P?
MPQ4346GLE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4346GLE-33-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-33-AEC1-P?
For technical support, including MPQ4346GLE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4346GLE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ4346GLE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4346GLE-33-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-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4346GLE-33-AEC1-P?
All MPQ4346GLE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4346GLE-33-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-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4346GLE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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