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Monolithic Power Systems Inc. MPQ2451GG-5-AEC1-Z
- Part No.:
- MPQ2451GG-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
MPQ2451GG-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 600MA 6QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ2451GG-5-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, 36V-input, 2.2MHz synchronous step-down DC/DC converter with integrated 500mΩ high-side MOSFET, delivering up to 0.6A at fixed 5V output. It features current-mode control, internal compensation, and 130µA quiescent current-designed for automotive body electronics requiring stable 5V rail generation from battery-supplied 12V/24V systems.
For engineers reviewing the MPQ2451GG-5-AEC1-Z datasheet, MPQ2451GG-5-AEC1-Z pinout, MPQ2451GG-5-AEC1-Z application, or MPQ2451GG-5-AEC1-Z equivalent, this device supports high-frequency, low-EMI power conversion in space-constrained automotive modules where input voltage transients (up to 36V), thermal robustness (−40°C to +125°C), and shutdown current (<1µA) are critical selection criteria.
Technical Context
The MPQ2451GG-5-AEC1-Z implements fixed-frequency peak-current-mode control with 2.2MHz switching, enabling compact external components (e.g., 3.3µH inductor, 22µF ceramic output capacitor). Its internal soft-start (0.5–1ms ramp) prevents output overshoot during cold-crank startup, while frequency fold-back avoids inductor current runaway at light load.
Thermal shutdown activates at 150°C junction temperature, and under-voltage lockout (UVLO) has 2.7V rising / 2.3V falling thresholds. The bootstrap driver charges the BST-SW capacitor to ~5V using VIN, requiring ≥3V headroom (VIN − VOUT > 3V) for reliable gate drive in high-duty-cycle applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - accommodates automotive battery transients including load dump and cold-crank conditions. |
| Output Voltage | Fixed 5V ±2% - eliminates external feedback resistors, reducing BOM count and layout sensitivity. |
| Max Output Current | 0.6A continuous - sufficient for powering microcontrollers, CAN transceivers, and sensors in distributed ECUs. |
| Switching Frequency | 2.2MHz ±20% - enables use of sub-4mm inductors and minimizes EMI in sensitive RF zones. |
| Quiescent Current | 130µA typical - extends battery life in always-on automotive modules such as door controllers and seat memory systems. |
| Shutdown Current | 1µA max - meets ultra-low-power requirements for vehicle sleep-mode compliance (e.g., ISO 16750-2). |
| Internal MOSFET RDS(ON) | 500mΩ at VBST−VSW = 5V - reduces conduction loss without external high-side switch, simplifying design. |
Pinout & Package
MPQ2451GG-5-AEC1-Z uses a thermally enhanced 2mm × 2mm QFN-6L package with exposed thermal pad, supporting ≤1.56W continuous power dissipation at 25°C ambient (θJA = 80°C/W on 4-layer PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 6) | Bootstrap supply | Provides floating gate drive voltage for internal high-side MOSFET; requires 100nF ceramic capacitor between BST and SW. |
| GND (Pin 5) | Power ground | Primary return path for output current; must be connected directly to thermal pad and output capacitor negative terminal. |
| OUT (Pin 4) | Feedback sense | Internally tied to 5V divider tap-no external resistor needed; connects to output capacitor positive for regulation stability. |
| EN (Pin 3) | Enable control | Active-high logic input (1.35–1.8V threshold); float to disable; supports system-level power sequencing. |
| VIN (Pin 2) | Main input supply | Accepts full 3.3–36V range; requires local 10µF ceramic decoupling close to pin to suppress switching noise. |
| SW (Pin 1) | Switch node | Drives external freewheeling diode or synchronous rectifier; high dv/dt node requiring shortest possible trace routing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with full automotive reliability testing (HTOL, TC, UHAST). |
| Internally compensated control loop | Eliminates need for external compensation network-reduces component count and layout tuning effort. |
| Precision cycle-by-cycle current limit | 0.75A typical trip point with no external sense resistor-enables robust short-circuit protection in motor drivers and lighting loads. |
| Stable with ceramic output capacitors | Supports low-ESR MLCCs only-avoids tantalum/electrolytic bulk caps, improving lifetime and temperature stability. |
| Frequency fold-back at light load | Reduces switching losses below 10% load-maintains >85% efficiency down to 10mA output current. |
Applications
| Automotive Body Control Module | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers MCU, LIN transceiver, and window/mirror actuators in centralized body controller with 12V battery input subject to load dump. IC Role / Device Role / Timing Role: Primary 5V buck regulator providing clean, transient-tolerant rail for safety-critical logic and analog peripherals. Use Value: UVLO hysteresis (0.4V) and 36V max input withstand capability prevent brownout during alternator load dump events per ISO 7637-2 Pulse 5a. | Use Scenario: Supplies 5V to image sensor and ISP in rear-view camera module mounted near exhaust or engine bay. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter operating continuously in harsh thermal environment. Use Value: 125°C max junction rating and QFN thermal pad enable reliable operation at 85°C ambient without derating-critical for under-hood placement. |
| Automotive Infotainment Display | Electric Power Steering (EPS) Sensor Rail |
Use Scenario: Generates 5V for touch controller and display interface ICs in center-stack infotainment unit with stop-start compatibility. IC Role / Device Role / Timing Role: Always-on power stage maintaining regulated output during engine cranking (VIN dips to 6V). Use Value: 3.3V min input and 130µA quiescent current ensure uninterrupted operation during cold-crank events per ISO 16750-2. | Use Scenario: Provides isolated 5V supply to torque and position sensors in EPS control unit requiring functional safety compliance. IC Role / Device Role / Timing Role: Safety-relevant power converter with thermal shutdown and current limiting for ASIL-B subsystems. Use Value: AEC-Q100 Grade 1 qualification and cycle-by-cycle current limit support diagnostic coverage required by ISO 26262 hardware safety goals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2451GT-5-AEC1-Z | SOT23-6L package (θJA = 220°C/W), lower thermal performance, same electrical specs. | Suitable for low-power, non-thermally constrained modules like key fobs or interior switches. | Select when board space allows larger footprint and thermal budget exceeds 0.57W. |
| TI TPS54331DR | 3.5–28V input, 3A output, 570mΩ MOSFET, no AEC-Q100 qualification. | Industrial or non-automotive 5V rail generation where automotive qualification is not mandated. | Choose only for cost-sensitive non-automotive designs-lacks AEC-Q100 validation and fails automotive thermal/EMI requirements. |
Compared with MPQ2451GT-5-AEC1-Z, the QFN package offers 2.8× better thermal resistance (80 vs. 220°C/W), enabling higher ambient operation; versus TPS54331DR, MPQ2451GG-5-AEC1-Z provides guaranteed automotive reliability but lower current capacity-making it optimal for space- and thermal-constrained 0.6A automotive rails.
Availability
MPQ2451GG-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, and infotainment displays requiring stable component supply with full AEC-Q100 traceability and long-term production continuity.
Supply support for MPQ2451GG-5-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 core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and consumer markets.
The MPQ2451 product line delivers compact, AEC-Q100-qualified buck regulators targeting automotive subsystems needing high input voltage tolerance, low quiescent current, and minimal external components-specifically engineered for body electronics and sensor power rails.
FAQ
What is the maximum allowable input voltage for MPQ2451GG-5-AEC1-Z?
The absolute maximum input voltage is +40V, but the recommended operating range is 3.3V to 36V. Operation above 36V risks exceeding safe operating area limits and may trigger overvoltage protection or damage the internal MOSFET. Automotive applications must stay within 36V to comply with ISO 7637-2 load-dump immunity requirements.
Does MPQ2451GG-5-AEC1-Z require an external bootstrap diode?
No external bootstrap diode is required under standard operation. The internal bootstrap regulator charges the BST capacitor from VIN. However, an external diode (e.g., BAT54) is recommended when VIN ≤ 6V or duty cycle exceeds 65% (VOUT/VIN > 0.65) to maintain sufficient gate drive voltage and prevent dropout.
How does the current-limit function operate without a sense resistor?
The device integrates a precision current-sense MOSFET that mirrors the main power switch current. This sensed signal feeds a high-speed comparator referenced to the COMP voltage. When the mirrored current exceeds the COMP-set threshold, the switch turns off cycle-by-cycle-achieving accurate 0.75A typical current limit without external components or PCB layout sensitivity.
Can MPQ2451GG-5-AEC1-Z operate with ceramic output capacitors only?
Yes-it is specifically designed for stability with ceramic output capacitors (e.g., 22µF X5R/X7R MLCC). The internal compensation and current-mode architecture eliminate the need for high-ESR electrolytic or tantalum capacitors, reducing size, improving lifetime, and avoiding capacitance drift over temperature and bias voltage.
What is the thermal shutdown behavior and recovery mechanism?
Thermal shutdown activates at 150°C junction temperature, disabling the power switch and pulling COMP low. Recovery occurs automatically when die temperature falls below 135°C (15°C hysteresis), after which soft-start reinitiates. This fault-tolerant behavior prevents permanent damage during sustained overload or poor heatsinking conditions.
Is the EN pin internally pulled down when left floating?
Yes-the EN pin has an internal pull-down to GND, ensuring the device remains disabled if unconnected. To enable operation, EN must be driven above 1.35V (typical). This feature simplifies system power sequencing and prevents unintended startup during board handling or partial power-up.
What PCB layout practices are critical for EMI reduction?
Minimize SW node loop area by placing input capacitor, catch diode, and GND connections as close as possible to the IC pins. Route feedback traces away from inductors and noisy power paths-ideally on opposite layer with ground plane separation. Use ≥6 thermal vias (15mil diameter, 40mil pitch) under the exposed pad to reduce θJA and suppress radiated emissions.
MPQ2451GG-5-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- 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:
- 600mA
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-QFN (2x2)
MPQ2451GG-5-AEC1-Z FAQ
1.How can I place an order for MPQ2451GG-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2451GG-5-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 MPQ2451GG-5-AEC1-Z reliable?
The price and inventory of MPQ2451GG-5-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 MPQ2451GG-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2451GG-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2451GG-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2451GG-5-AEC1-Z?
MPQ2451GG-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2451GG-5-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 MPQ2451GG-5-AEC1-Z?
For technical support, including MPQ2451GG-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2451GG-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2451GG-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2451GG-5-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 MPQ2451GG-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2451GG-5-AEC1-Z?
All MPQ2451GG-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2451GG-5-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 MPQ2451GG-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2451GG-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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