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Monolithic Power Systems Inc. MPQ4313GRE-33-AEC1-Z
- Part No.:
- MPQ4313GRE-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4313GRE-33-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.3V 3A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,959
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Product details
Overview
MPQ4313GRE-33-AEC1-Z from Monolithic Power Systems is a 45V, 3A AEC-Q100 Grade 1 synchronous step-down converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, fixed 3.3V output, frequency spread spectrum (FSS), and 1.7μA shutdown current. It operates across 3.3V–45V input range and delivers regulated power for automotive infotainment, clusters, and ADAS systems under cold-crank and wide-temp conditions.
For engineers reviewing the MPQ4313GRE-33-AEC1-Z datasheet, MPQ4313GRE-33-AEC1-Z pinout, MPQ4313GRE-33-AEC1-Z application, or MPQ4313GRE-33-AEC1-Z equivalent, key selection factors include its AEC-Q100 qualification, 3.3V fixed output accuracy (±2%), 100ns minimum on-time, FSS-enabled CISPR25 Class 5 EMI compliance, and selectable AAM/FCCM modes for light-load efficiency vs. ripple trade-offs.
Technical Context
The MPQ4313GRE-33-AEC1-Z implements current-mode control with programmable switching frequency (350–1000kHz) and supports external synchronization via SYNCIN with 180° out-of-phase SYNCO output. Its advanced asynchronous mode (AAM) reduces light-load quiescent current to 18μA while forced continuous conduction mode (FCCM) ensures fixed-frequency operation for predictable EMI filtering.
It integrates frequency foldback at startup to prevent inductor current runaway, thermal shutdown at 170°C with 20°C hysteresis, and low-dropout mode enabling stable regulation down to VIN = VOUT + 0.5V - critical for automotive cold-crank (4.5V–5.5V battery transients).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (4.5V) and load-dump (40V+) |
| Output Voltage | Fixed 3.3V ±2% - eliminates external feedback resistors; enables direct powering of MCU I/O, CAN transceivers, and sensors |
| Continuous Output Current | 3A - sufficient for multi-rail domain supplies in instrument clusters and head units |
| Shutdown Quiescent Current | 1.7μA - extends battery life in always-on automotive modules (e.g., telematics, alarm systems) |
| Switching Frequency Range | 350kHz to 1000kHz - allows EMI optimization and inductor size reduction; programmable via FREQ pin resistor |
| FSS Modulation | Integrated frequency spread spectrum - reduces peak radiated/conducted emissions to meet CISPR25 Class 5 limits without added filters |
| Thermal Protection | 170°C junction shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking |
Pinout & Package
MPQ4313GRE-33-AEC1-Z is housed in a wettable flank QFN-20 (4mm × 4mm) package, optimized for automated optical inspection (AOI) and robust solder joint reliability in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced CCM (low ripple); pull low for AAM (ultra-low IQ in standby); floating prohibited |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; requires ≤51kΩ pulldown if unused to avoid noise coupling |
| 3,12 VIN | Main power input | Supplies control circuitry and power switches; requires local ceramic decoupling near pins |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high di/dt switch currents; must be connected to solid ground plane |
| 6 BST | Bootstrap supply | Connect 0.1μF ceramic capacitor between BST and SW to drive high-side MOSFET gate |
| 7,8 SW | Switch node | Drives external inductor; high dv/dt node requiring minimized trace area and guard ring |
| 9 EN | Enable control | Active-high logic; 1V threshold enables regulator; <0.85V disables with 1.7μA IQ |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator or inverted SYNCIN; float if unused |
| 14 PG | Power good indicator | Open-drain output; requires external pull-up; asserts high when VOUT is within 95–105% of 3.3V |
| 15 NC | No connect | Must tie to VCC or VOUT ≥3V; never leave floating |
| 16 VCC | Bias supply | Internal LDO output; requires dedicated 1μF ceramic decoupling to PGND |
| 17 AGND | Analog ground | Reference for FB, SS, MODE; separate from PGND and tied at single point near IC |
| 18 FB | Feedback input | Internally tied to 3.3V output; not used in fixed-version - short to VOUT per datasheet |
| 19 SS | Soft-start timing | 6μA current source charges external capacitor; sets inrush current ramp time |
| 20 FREQ | Frequency programming | Resistor-to-GND sets fSW per fSW vs. RFREQ curve; 62kΩ yields 470kHz nominal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for -40°C to +125°C junction temperature - validated for under-hood and dashboard mounting |
| Wettable flank QFN-20 package | Enables AOI-compatible solder joint inspection - required for zero-defect automotive manufacturing |
| Frequency spread spectrum (FSS) | Reduces peak EMI by >10dB across 150kHz–1GHz - meets CISPR25 Class 5 without added ferrites or shielding |
| Low-dropout mode | Maintains regulation with VIN as low as VOUT + 0.5V - sustains operation during 4.5V cold-crank events |
| Hiccup over-current protection | Auto-retry shutdown on sustained overload - prevents thermal runaway while preserving system recoverability |
| 100ns minimum on-time | Supports high VIN/VOUT ratios (e.g., 45V→3.3V) in single-stage conversion - avoids need for pre-regulator |
Applications
| Automotive Infotainment Head Unit | Instrument Cluster Display Supply |
|---|---|
|
Use Scenario: Powers SoC core logic, DDR memory, and audio codec in 12V/24V vehicle platforms with variable battery voltage and EMI constraints. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering 3A continuous current with FSS-enabled CISPR25 Class 5 compliance. Use Value: Eliminates need for external EMI filters and secondary regulators, reducing BOM count and PCB area by >15% versus discrete solutions. |
Use Scenario: Supplies TFT-LCD bias, microcontroller I/O, and CAN transceiver rails in digital instrument clusters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter operating from cold-crank (4.5V) to load-dump (40V) with low-dropout mode and thermal shutdown. Use Value: Ensures uninterrupted display operation during engine start-stop cycles and maintains <±2% output accuracy across -40°C to +105°C. |
| ADAS Camera Module Power | Automotive Telematics Control Unit |
|
Use Scenario: Provides clean, low-noise 3.3V rail for image sensor, ISP, and MIPI interface in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Synchronous buck with AAM mode for ultra-low standby IQ and FCCM for low-noise active operation. Use Value: Achieves <18μA sleep current and <10mVpp output ripple - meets ISO 26262 functional safety power integrity requirements. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure MCU in always-on telematics units with battery backup capability. IC Role / Device Role / Timing Role: High-efficiency step-down converter with 1.7μA shutdown current and EN-controlled wake-up sequencing. Use Value: Extends backup battery life to >30 days in disconnected state while supporting fast (<1ms) wake-up response to cellular events. |
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 |
|---|---|---|---|
| MPQ4313GRE-5-AEC1-Z | Fixed 5V output; identical specs otherwise - same package, AEC-Q100 grade, FSS, and pinout | Targets 5V logic domains (e.g., USB PHY, Ethernet PHY) instead of 3.3V MCU/Sensor rails | Select when system requires 5V primary rail; no layout change needed beyond output capacitor re-rating |
| MPQ4312GRE-33-AEC1-Z | 2A output rating; same 3.3V fixed output, QFN-20 package, and AEC-Q100 qualification | Suitable for lower-power domains (e.g., body control modules, lighting controllers) where 3A headroom is unnecessary | Choose for cost-sensitive designs with <2A load; shares footprint and layout but derates thermal margin by ~33% |
Compared with MPQ4313GRE-33-AEC1-Z, the 5V variant serves different voltage domains without changing board layout, while the 2A MPQ4312 offers cost savings where full 3A capability is unused - both retain identical automotive qualification and EMI performance.
Availability
MPQ4313GRE-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and ADAS camera modules requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for MPQ4313GRE-33-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 MPQ4313 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-temperature, high-reliability vehicle subsystems requiring AEC-Q100 compliance, low EMI, and extended lifetime operation.
FAQ
What is the purpose of the MODE pin, and how should it be configured?
The MODE pin selects between Advanced Asynchronous Mode (AAM) and Forced Continuous Conduction Mode (FCCM). Pull MODE low for AAM to minimize light-load quiescent current (18μA), ideal for battery-backed modules. Pull high for FCCM to maintain fixed switching frequency and reduce output ripple during active operation. Leaving MODE floating is prohibited and may cause erratic behavior.
Does MPQ4313GRE-33-AEC1-Z require external feedback resistors?
No. The "-33" suffix indicates a factory-trimmed fixed 3.3V output version. The FB pin is internally connected to the output; per the datasheet, it must be shorted to VOUT (not left open or pulled to ground). This eliminates resistor tolerance errors and saves PCB space versus adjustable versions.
How does the frequency spread spectrum (FSS) function improve EMI performance?
FSS modulates the switching frequency around a center value (e.g., ±5% around 470kHz), spreading energy across a wider bandwidth. This lowers peak conducted and radiated emissions by up to 12dB, enabling compliance with CISPR25 Class 5 without adding external EMI filters - verified on the official MPS EVB with standard layout.
What is the recommended layout practice for the PGND and AGND connections?
PGND pins (4,5,10,11) must connect directly to a low-impedance power ground plane to handle high di/dt switch currents. AGND (pin 17) is the analog reference for FB, SS, and MODE - route it separately and tie to PGND at a single point near the IC. Avoid sharing traces or vias between PGND and AGND to prevent noise coupling into feedback paths.
Can MPQ4313GRE-33-AEC1-Z operate during automotive cold-crank conditions?
Yes. Its low-dropout mode maintains regulation with input as low as 3.8V (VOUT + 0.5V) at full 3A load, and the 3.3V UVLO threshold (2.7V typical) ensures reliable startup even during 4.5V cold-crank transients. Combined with -40°C to +125°C junction rating, it meets ISO 16750-2 requirements.
Is the wettable flank feature mandatory for automotive assembly?
While not strictly mandatory, the wettable flank (E-suffix) is strongly recommended for automotive production. It enables automated optical inspection (AOI) of solder joints on bottom-terminated QFN packages - a key requirement for zero-defect manufacturing in Tier 1 suppliers and OEMs adhering to IATF 16949.
What thermal derating applies when operating at 125°C ambient temperature?
With θJA = 44°C/W on a 4-layer JEDEC board, maximum allowable power dissipation at TA = 125°C is (150°C − 125°C)/44°C/W ≈ 0.57W. At 3.3V/3A output (10.9W), this implies significant derating - use the EVB layout (θJA = 23°C/W) or add copper area/thermal vias to sustain full load above 85°C ambient.
MPQ4313GRE-33-AEC1-Z 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-Z FAQ
1.How can I place an order for MPQ4313GRE-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4313GRE-33-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 MPQ4313GRE-33-AEC1-Z reliable?
The price and inventory of MPQ4313GRE-33-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 MPQ4313GRE-33-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4313GRE-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4313GRE-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4313GRE-33-AEC1-Z?
MPQ4313GRE-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4313GRE-33-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 MPQ4313GRE-33-AEC1-Z?
For technical support, including MPQ4313GRE-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4313GRE-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4313GRE-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4313GRE-33-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 MPQ4313GRE-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4313GRE-33-AEC1-Z?
All MPQ4313GRE-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4313GRE-33-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 MPQ4313GRE-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4313GRE-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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