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Monolithic Power Systems Inc. MPQ4313GRE-33-AEC1-P
- Part No.:
- MPQ4313GRE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4313GRE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 3A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
MPQ4313GRE-33-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 3A continuous output at fixed 3.3V from a 3.3V–45V automotive input. It integrates 48mΩ high-side and 20mΩ low-side MOSFETs, supports frequency spread spectrum (FSS) for CISPR25 Class 5 EMI compliance, and operates with 1.7μA shutdown current-enabling use in always-on battery systems such as automotive infotainment power rails.
For engineers reviewing the MPQ4313GRE-33-AEC1-P datasheet, MPQ4313GRE-33-AEC1-P pinout, MPQ4313GRE-33-AEC1-P application, or MPQ4313GRE-33-AEC1-P equivalent, key selection considerations include its wettable-flank QFN-20 package, programmable 350–1000kHz switching frequency, selectable AAM/FCCM modes, low-dropout operation for cold-crank conditions, and integrated power-good signaling with ±3.5% threshold accuracy.
Technical Context
The MPQ4313GRE-33-AEC1-P employs current-mode control with internal compensation, enabling fast transient response and stable regulation across wide input (3.3V–45V) and load (0–3A) ranges. Its architecture includes frequency foldback at startup, hiccup-mode overcurrent protection, and thermal shutdown at 170°C with 20°C hysteresis.
It supports external synchronization via SYNCIN (350–1000kHz), provides 180° out-of-phase SYNCO output, and features symmetric VIN routing and FSS to suppress peak EMI emissions-validated per CISPR25 Class 5 conducted/radiated limits in standard test setups with EMI filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3V ±2% (3234–3366 mV at 25°C); enables direct powering of MCU I/O, CAN transceivers, and display logic without external feedback resistors. |
| Input voltage range | 3.3V to 45V; accommodates full automotive battery range including cold-crank (4.5V) and load-dump (40V+) events without external protection circuitry. |
| Continuous output current | 3A; sustains full-rated load at 125°C junction temperature with proper PCB copper area and thermal vias under QFN-20 (4mm×4mm) package constraints. |
| Quiescent current | 1.7μA in shutdown mode; allows >10-year battery standby life in telematics modules with periodic wake-up intervals. |
| Switching frequency | Programmable 350–1000kHz via FREQ pin resistor; permits optimization between inductor size (higher fSW → smaller L) and light-load efficiency (lower fSW → reduced switching loss). |
| EMI mitigation | Integrated frequency spread spectrum (FSS) + symmetric VIN layout; achieves CISPR25 Class 5 peak/average conducted and radiated emissions compliance without added ferrite beads or shielding cans. |
| Power-good accuracy | PG asserts when VOUT is within 95–105% of nominal; provides reliable system reset sequencing for downstream processors with ±3.5% detection window. |
Pinout & Package
MPQ4313GRE-33-AEC1-P is housed in a wettable-flank QFN-20 (4mm × 4mm) package with exposed thermal pad, rated MSL Level 1 and qualified to AEC-Q100 Grade 1 (−40°C to +125°C TJ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced continuous conduction (FCCM) during noise-sensitive operation; pull low for advanced asynchronous mode (AAM) to maximize light-load efficiency. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; enables deterministic timing alignment across multiple converters to avoid beat frequencies and reduce system-level EMI. |
| 3,12 VIN | Main input supply | Connects to 3.3–45V source; requires local 10μF ceramic decoupling close to pins to suppress switching transients and ensure UVLO stability. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high di/dt switch currents; must be tied directly to thermal pad and separated from AGND to prevent noise coupling into feedback loop. |
| 6 BST | Bootstrap supply | Supplies gate drive for high-side MOSFET; requires 0.1μF ceramic capacitor between BST and SW to sustain gate voltage during 100ns minimum on-time operation. |
| 7,8 SW | Switch node | Drives external inductor; exhibits fast-edge switching (typ. <20ns rise/fall); layout must minimize loop area to reduce EMI and voltage overshoot. |
| 9 EN | Enable control | Logic-level input (0.85V threshold); enables soft-start initiation and supports system-level power sequencing with external microcontroller GPIO. |
| 13 SYNCO | Synchronized clock output | Provides 180° out-of-phase clock vs. internal oscillator or inverted SYNCIN; used to synchronize secondary converters without additional timing ICs. |
| 14 PG | Power-good indicator | Open-drain output requiring external pull-up; signals valid regulation status to host processor or PMIC for safe boot sequence execution. |
| 15 NC | No-connect | Must be connected to VCC or VOUT (≥3V); floating this pin risks undefined behavior due to internal leakage paths. |
| 16 VCC | Bias supply | Internal LDO output (~4.9V); powers control circuitry and gate drivers; requires dedicated 1μF ceramic decoupling to maintain stability under dynamic load steps. |
| 17 AGND | Analog ground reference | Reference for FB, SS, and internal error amplifier; must be routed separately from PGND and joined at single-point star ground near VCC capacitor. |
| 18 FB | Feedback input | Fixed-output version: shorted internally to VOUT; no external divider needed-reduces BOM count and layout sensitivity versus adjustable variants. |
| 19 SS | Soft-start timing | 6μA current source charges external capacitor; sets monotonic VOUT ramp time to limit inrush current and prevent input droop during startup. |
| 20 FREQ | Frequency programming | Resistor-to-ground sets fSW per defined curve (e.g., 62kΩ → 470kHz); enables precise EMI notch placement and avoids sensitive frequency bands. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-20 package | Enables automated optical inspection (AOI) of solder joints in automotive production lines, improving first-pass yield and long-term reliability verification. |
| Low-dropout mode | Maintains regulation down to VIN = VOUT + 0.5V (e.g., 3.8V input for 3.3V output), critical for engine cranking where battery dips to 4.5V without brownout. |
| Frequency spread spectrum (FSS) | Reduces peak radiated emissions by >10dB across 150kHz–1GHz band, eliminating need for costly EMI filters in space-constrained automotive modules. |
| Selectible AAM/FCCM operation | AAM extends battery runtime in sleep states (e.g., parked ADAS cameras); FCCM ensures consistent ripple and predictable EMI during active sensing phases. |
| Hiccup overcurrent protection | Enters timed restart cycle upon current-limit violation, preventing thermal runaway during sustained overload or short-circuit faults without latch-off. |
| 100ns minimum on-time | Supports high VIN/VOUT ratios (e.g., 45V→3.3V) in single-stage conversion, avoiding cascaded regulators and associated efficiency losses and component count. |
Applications
| Automotive Infotainment Head Unit | Instrument Cluster Display Power |
|---|---|
Use Scenario: Powers SoC core, DDR memory, and touch controller in 12V/24V vehicle head units with strict EMI limits. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator with FSS and synchronized clock output to coordinate multi-rail power sequencing. Use Value: Eliminates external EMI filter components while meeting CISPR25 Class 5 requirements, reducing BOM cost and PCB area by ≥15%. |
Use Scenario: Supplies 3.3V to TFT LCD driver and microcontroller in digital instrument clusters exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability power stage with AEC-Q100 Grade 1 qualification and −40°C to +125°C operation. Use Value: Ensures uninterrupted display functionality during cold-crank (4.5V VIN) and load-dump (40V transients) without derating or external TVS. |
| ADAS Camera Module | Telematics Control Unit (TCU) |
Use Scenario: Powers image sensor, ISP, and Ethernet PHY in rear-view or surround-view cameras mounted in exterior locations. IC Role / Device Role / Timing Role: Low-IQ buck converter with 1.7μA shutdown current enabling always-on vision processing during vehicle sleep mode. Use Value: Extends vehicle battery life beyond 10 years in parking surveillance mode, meeting OEM requirements for zero parasitic drain. |
Use Scenario: Generates 3.3V rail for cellular modem, GNSS receiver, and secure element in cloud-connected TCUs operating continuously. IC Role / Device Role / Timing Role: Synchronous buck with PG output and thermal shutdown, enabling safe firmware updates and fault logging during field operation. Use Value: Provides deterministic power-good assertion for bootloader validation and prevents corrupted OTA updates due to undervoltage conditions. |
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 |
|---|---|---|---|
| MPQ4312GRE-33-AEC1-P | 2A output current; identical pinout, package, and feature set except lower current rating and higher RDS(on) (55mΩ HS / 25mΩ LS). | Suitable for lower-power domains like CAN FD interfaces or sensor hubs where 3A headroom is unnecessary. | Select when thermal budget or cost is constrained and peak load remains ≤2A; retains full drop-in compatibility with same PCB footprint. |
| LM61480QRJNRQ1 | Texas Instruments part; 3.5A rating, 3.3V fixed output, but lacks FSS and wettable flank; uses different pinout (16-pin WQFN) and requires external compensation. | Used in non-EMI-critical industrial applications where TI ecosystem support or specific qualification (AEC-Q100 Grade 0) is mandated. | Choose only if existing design uses LM61480 footprint or requires TI-specific design tools; not pin- or function-compatible with MPQ4313GRE-33-AEC1-P. |
Compared with MPQ4312GRE-33-AEC1-P, the MPQ4313GRE-33-AEC1-P delivers 50% higher current capacity and lower conduction loss, making it optimal for thermally dense ADAS modules; versus LM61480QRJNRQ1, it offers superior EMI performance and automotive-grade manufacturability at the expense of vendor lock-in flexibility.
Availability
MPQ4313GRE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and ADAS camera applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MPQ4313GRE-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 LED lighting controllers.
The MPQ4313 belongs to MPS's automotive-grade buck converter product line, engineered specifically for harsh-temperature, high-EMI environments in modern vehicles-including infotainment, ADAS, and body electronics-where reliability, small form factor, and regulatory compliance are mandatory.
FAQ
What is the maximum allowable input voltage for MPQ4313GRE-33-AEC1-P?
The absolute maximum VIN rating is +50V, but the recommended operating range is 3.3V to 45V. Operation up to 45V covers automotive load-dump transients per ISO 7637-2 Pulse 5a, and the device includes internal overvoltage clamping to protect internal circuitry during transient events.
Does MPQ4313GRE-33-AEC1-P require external feedback resistors?
No. The "-33" suffix denotes a fixed 3.3V output version; the feedback reference is internally connected to VOUT, eliminating the need for external resistor dividers. This simplifies layout, improves regulation accuracy, and reduces component count compared to adjustable variants.
How does the wettable flank feature benefit manufacturing?
The wettable flank design exposes solderable sidewalls on all four edges of the QFN-20 package, enabling automated optical inspection (AOI) of solder joint quality-critical for zero-defect automotive production. It also improves thermal transfer and mechanical reliability under thermal cycling stress.
Can MPQ4313GRE-33-AEC1-P operate during cold-crank conditions?
Yes. Its low-dropout mode maintains regulation down to VIN ≈ VOUT + 0.5V (e.g., 3.8V for 3.3V output), supporting operation when battery voltage drops to 4.5V during engine cranking-without requiring pre-regulation or backup capacitors.
What is the purpose of the SYNCO pin?
SYNCO outputs a clock signal 180° out-of-phase with the internal oscillator (or inverted relative to SYNCIN). This enables precise interleaving of multiple MPQ4313 devices to cancel ripple current in multi-phase designs and reduce input/output capacitor stress.
Is frequency spread spectrum (FSS) enabled by default?
Yes. FSS is internally activated and cannot be disabled. It modulates switching frequency by ±6% around the programmed center frequency, spreading energy across a wider bandwidth to suppress narrowband EMI peaks-key for passing CISPR25 Class 5 certification.
What thermal performance can be expected in a standard 4-layer PCB layout?
On a standard 4-layer evaluation board (2oz copper, 9cm×9cm), θJA is 23°C/W. At 3A load and 25°C ambient, junction temperature rise is ~69°C, resulting in TJ ≈ 94°C-well below the 150°C maximum and within AEC-Q100 Grade 1 specification limits.
MPQ4313GRE-33-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-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):
- 45V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 470kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x4)
MPQ4313GRE-33-AEC1-P FAQ
1.How can I place an order for MPQ4313GRE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4313GRE-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 MPQ4313GRE-33-AEC1-P reliable?
The price and inventory of MPQ4313GRE-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 MPQ4313GRE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4313GRE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4313GRE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4313GRE-33-AEC1-P?
MPQ4313GRE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4313GRE-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 MPQ4313GRE-33-AEC1-P?
For technical support, including MPQ4313GRE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4313GRE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ4313GRE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4313GRE-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 MPQ4313GRE-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4313GRE-33-AEC1-P?
All MPQ4313GRE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4313GRE-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 MPQ4313GRE-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4313GRE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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