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Monolithic Power Systems Inc. MPQ4314GRE-AEC1-P
- Part No.:
- MPQ4314GRE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4314GRE-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 4A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:470
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Product details
Overview
MPQ4314GRE-AEC1-P from Monolithic Power Systems is a 45V, 4A AEC-Q100 Grade 1 qualified synchronous step-down converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, 350–1000kHz programmable switching frequency, frequency spread spectrum (FSS), and 1.7μA shutdown current. It delivers regulated 3.3V output in automotive infotainment and ADAS power rails where cold-crank resilience and low EMI are critical.
For engineers reviewing the MPQ4314GRE-AEC1-P datasheet, MPQ4314GRE-AEC1-P pinout, MPQ4314GRE-AEC1-P application, or MPQ4314GRE-AEC1-P equivalent, key selection criteria include its AEC-Q100 qualification, wettable flank QFN-20 package, 100ns minimum on-time, selectable AAM/FCCM modes, and PG output with ±5% window for system monitoring.
Technical Context
The MPQ4314GRE-AEC1-P implements current-mode control with fast loop response and supports both adjustable-output and fixed 3.3V versions. Its internal architecture integrates gate drivers, bootstrap circuitry, and thermal shutdown, enabling operation across -40°C to +150°C junction temperature.
It features frequency foldback at startup to prevent inductor current runaway, low-dropout mode for automotive cold-crank (VIN down to 3.3V), and symmetric VIN routing for reduced EMI. The device supports external synchronization via SYNCIN and provides 180° out-of-phase clock output on SYNCO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank and load-dump conditions. |
| Output Current | 4A continuous - sufficient for powering SoCs, displays, and radar modules in ADAS clusters. |
| Shutdown Current | 1.7μA - enables ultra-low-power sleep states in always-on vehicle subsystems. |
| Switching Frequency | 350kHz–1000kHz programmable via resistor - allows EMI optimization and inductor size trade-offs. |
| FSS & EMI Performance | Frequency Spread Spectrum enabled - meets CISPR25 Class 5 conducted/radiated emission limits without added filters. |
| Power Good Threshold | ±5% VOUT window (95–105%) - provides reliable rail monitoring for microcontroller reset sequencing. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C TJ) - qualified for under-hood and instrument cluster applications. |
Pinout & Package
MPQ4314GRE-AEC1-P is housed in a wettable flank QFN-20 (4mm × 4mm) package with exposed thermal pad, supporting automated optical inspection (AOI) and enhanced solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM select | Pull high for forced continuous conduction (FCCM); pull low for advanced asynchronous modulation (AAM) to minimize light-load IQ. |
| 2 SYNCIN | External clock input | Accepts 350–1000kHz sync signal; enables multi-rail timing coordination and EMI reduction via phase interleaving. |
| 3,12 VIN | Main input supply | Supplies control circuitry and HS-FET; requires local ceramic decoupling to suppress switching noise. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high di/dt switch currents; must be connected to thermal pad and separated from AGND. |
| 6 BST | Bootstrap supply | Drives HS-FET gate; requires 0.1μF ceramic capacitor between BST and SW for proper high-side gate biasing. |
| 7,8 SW | Switch node | Connects internal HS/LS FETs; routes to inductor; layout critical for minimizing voltage spikes and EMI. |
| 9 EN | Enable control | Active-high logic; 0.85V threshold ensures robust start-up under brown-out conditions. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator or SYNCIN - enables dual-phase operation with adjacent regulators. |
| 14 PG | Power good indicator | Open-drain output requiring external pull-up; asserts high only when VOUT is within ±5% of nominal value. |
| 15 NC | No connect | Must be left floating; no internal connection or function. |
| 16 VCC | Bias supply | Internal LDO output; powers gate drivers and logic; requires 1μF decoupling close to pin. |
| 17 AGND | Analog ground | Reference for FB, SS, and MODE; must be star-connected to PGND at single point to avoid noise coupling. |
| 18 FB | Feedback input | Monitors output via resistor divider; 0.815V reference enables precise regulation of fixed or adjustable outputs. |
| 19 SS | Soft-start control | 13μA current source charges external capacitor to linearly ramp VFB and limit inrush current during startup. |
| 20 FREQ | Frequency configuration | Resistor-to-ground sets fSW per curve on datasheet page 15; enables tuning for efficiency vs. EMI trade-off. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-20 | Enables AOI-compatible solder joint inspection for automotive production traceability and reliability assurance. |
| Low-dropout mode | Maintains regulation down to VIN = VOUT + 0.5V, supporting engine cranking events where battery drops to 3.3V. |
| Hiccup over-current protection | Shuts down and auto-retries on sustained overload - prevents thermal runaway while preserving downstream components. |
| 100ns minimum on-time | Supports high VIN-to-VOUT conversion ratios (e.g., 45V→3.3V) without pulse-skipping instability. |
| External soft-start | Capacitor-programmable tSS avoids inrush-induced bus droop in multi-rail systems sharing input capacitance. |
| Thermal shutdown with 20°C hysteresis | Triggers at 170°C and releases at 150°C - prevents cycling and ensures safe recovery after transient overload. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in centralized head unit with 12V/24V battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering 4A peak current; operates in FCCM mode for stable ripple during video processing bursts. Use Value: FSS and symmetric VIN routing reduce radiated emissions below CISPR25 Class 5 limits, eliminating need for external EMI filters. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera with cold-crank requirement and space-constrained PCB. IC Role / Device Role / Timing Role: Fixed 3.3V output regulator; uses low-dropout mode to sustain operation during 6V battery dips. Use Value: 1.7μA shutdown current extends battery life in parking-mode vision systems; wettable flank package ensures solder joint integrity. |
| Digital Instrument Cluster | Automotive Telematics Control Unit (TCU) |
|
Use Scenario: Generates 3.3V rail for MCU, TFT controller, and CAN transceivers in dashboard cluster exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 buck converter; employs AAM mode at idle to minimize quiescent loss and thermal rise. Use Value: −40°C to +150°C operation and 150°C thermal shutdown ensure reliability in sealed, non-ventilated enclosures. |
Use Scenario: Powers LTE/V2X modem and GPS receiver in TCU requiring clean, low-noise 3.3V supply synchronized with other rails. IC Role / Device Role / Timing Role: Synchronized buck regulator using SYNCIN/SYNCO pins to phase-align switching with RF subsystem clocks. Use Value: Out-of-phase SYNCO output enables dual-phase operation with second MPQ4314, halving input ripple and easing bulk capacitor sizing. |
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 |
|---|---|---|---|
| MPQ4315GRE-AEC1-P | 5A output rating; identical pinout, package, and feature set except higher current capability and slightly higher RDS(on). | Required where peak load exceeds 4A (e.g., high-brightness display backlight drivers). | Select when future-proofing for higher current or derating margin is needed; same layout and firmware compatibility. |
| TPS54340QDDARQ1 | 42V max VIN, 3.5A output, no FSS, no wettable flank, different pinout (SOIC-8), higher IQ (14.5μA shutdown). | Limited to lower-current, non-CISPR25-critical applications where board space permits SOIC package. | Choose only if legacy TI ecosystem integration is mandatory; lacks FSS, wettable flank, and cold-crank low-dropout mode. |
Compared with MPQ4314GRE-AEC1-P, MPQ4315GRE-AEC1-P offers higher current headroom with zero layout change, while TPS54340QDDARQ1 sacrifices EMI performance, package inspectability, and cold-crank capability for TI-specific toolchain alignment.
Availability
MPQ4314GRE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply across extended temperature and AEC-Q100-compliant manufacturing.
Supply support for MPQ4314GRE-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 for automotive, industrial, and consumer applications.
The MPQ4314 belongs to MPS's AEC-Q100-qualified automotive DC/DC converter family, designed specifically for demanding vehicle subsystems requiring low EMI, cold-crank resilience, and long-term reliability.
FAQ
What is the purpose of the MODE pin, and how should it be configured?
The MODE pin selects between Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM). Pull MODE low for AAM to minimize light-load quiescent current (18μA), ideal for battery-backed systems. Pull high for FCCM to maintain constant switching frequency and lower output ripple during dynamic loads like video processing. Never leave this pin floating.
Does MPQ4314GRE-AEC1-P support fixed 3.3V output without external feedback resistors?
Yes - the MPQ4314GRE-33-AEC1-P variant has an internally trimmed 3.3V output and does not require external FB resistors. The MPQ4314GRE-AEC1-P is the adjustable version and requires a resistor divider from VOUT to AGND with VFB = 0.815V reference. Both share identical pinout and package.
How is the switching frequency set, and what is the impact of RFREQ tolerance?
Switching frequency is set by connecting a resistor (RFREQ) from pin 20 to GND. For example, 62kΩ yields ~470kHz (typ). A ±1% resistor tolerance results in <±2% fSW variation, which affects inductor size, efficiency peak location, and EMI profile - use 1% metal-film resistors for production designs.
Can MPQ4314GRE-AEC1-P operate with input voltage below 3.3V during cold-crank?
No - the absolute minimum operating VIN is 3.3V per datasheet specifications. However, its low-dropout mode maintains regulation down to VIN = VOUT + 0.5V (e.g., 3.8V for 3.3V output), allowing uninterrupted operation during battery dips to ~6V in 12V systems and ~12V in 24V systems.
What thermal considerations apply when using the QFN-20 wettable flank package?
The QFN-20 exposes a thermal pad that must be soldered to a large copper pour connected to internal ground planes. With θJA = 44°C/W on standard 4-layer PCB, 4A continuous load at 45V input requires ≥4 cm² of 2oz copper on top/bottom layers and ≥6 thermal vias (0.3mm) under the pad to keep junction temperature below 150°C at 85°C ambient.
Is the PG pin compatible with 1.8V logic systems?
Yes - the open-drain PG pin can be pulled up to any valid logic supply (1.8V, 3.3V, or 5V). Its VOL is ≤0.3V at 1mA sink current, ensuring solid low-state margin across all common logic families. No level-shifting is required for interfacing with low-voltage MCUs.
How does Frequency Spread Spectrum (FSS) reduce EMI without affecting regulation performance?
FSS modulates the switching frequency ±6% around the center value (e.g., 470kHz ±28kHz), spreading energy across a wider bandwidth and reducing peak spectral amplitude. Regulation remains unaffected because the control loop bandwidth (typically >100kHz) is much higher than the FSS modulation rate (~300Hz), preserving transient response and stability.
MPQ4314GRE-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 0.815V
- Voltage - Output (Max):
- 42.75V
- Current - Output:
- 4A
- Frequency - Switching:
- 350kHz ~ 1MHz
- 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)
MPQ4314GRE-AEC1-P FAQ
1.How can I place an order for MPQ4314GRE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4314GRE-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 MPQ4314GRE-AEC1-P reliable?
The price and inventory of MPQ4314GRE-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 MPQ4314GRE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4314GRE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4314GRE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4314GRE-AEC1-P?
MPQ4314GRE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4314GRE-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 MPQ4314GRE-AEC1-P?
For technical support, including MPQ4314GRE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4314GRE-AEC1-P requirements.
6.How does Aetrix verify that MPQ4314GRE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4314GRE-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 MPQ4314GRE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4314GRE-AEC1-P?
All MPQ4314GRE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4314GRE-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 MPQ4314GRE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4314GRE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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