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Monolithic Power Systems Inc. MPQ4571GQBE-AEC1-P
- Part No.:
- MPQ4571GQBE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-VFQFN
- Datasheet:
-
MPQ4571GQBE-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 1A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
MPQ4571GQBE-AEC1-P from Monolithic Power Systems is a fully integrated, AEC-Q100 Grade-1 qualified synchronous buck converter delivering 1A continuous output current across a 4.5V–60V input range. It integrates high-side (250mΩ) and low-side (45mΩ) MOSFETs, supports up to 2.2MHz switching frequency, and features valley-current OCP, hiccup-mode SCP, and low-dropout operation for automotive cold-crank conditions. It powers infotainment systems and LED lighting in 12V/24V/48V vehicle architectures.
For engineers reviewing the MPQ4571GQBE-AEC1-P datasheet, MPQ4571GQBE-AEC1-P pinout, MPQ4571GQBE-AEC1-P application, or MPQ4571GQBE-AEC1-P equivalent, key selection criteria include its wettable-flank QFN-12 package, 2μA shutdown current, AAM/CCM light-load mode selectability, and integrated PG indicator with ±8% output voltage monitoring window.
Technical Context
The MPQ4571GQBE-AEC1-P employs peak-current-mode control with valley-current over-current protection and zero-cross detection for precise current limiting. Its internal compensation network eliminates external loop components, while the 180° out-of-phase SYNC output enables multi-phase synchronization without external clock generators.
It implements advanced asynchronous modulation (AAM) that dynamically scales switching frequency under light load to reduce gate driver and switching losses, achieving 40μA quiescent current at full operating temperature range (−40°C to +125°C). The device enters low-dropout mode below 4.5V input to sustain regulation during automotive cold-crank events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports direct connection to automotive battery rails including load-dump and cold-crank transients. |
| Continuous Output Current | 1A - sustained delivery without thermal derating under typical PCB layout with 2oz copper and 4-layer board. |
| Switching Frequency | 300kHz to 2.2MHz - adjustable via external resistor on FREQ pin; higher frequencies enable smaller magnetics and faster transient response. |
| Quiescent Current | 40μA - enables always-on functionality in battery-backed modules without significant standby drain. |
| Shutdown Current | 2μA - ensures minimal leakage during vehicle sleep mode, critical for ISO 16750-2 compliance. |
| FB Reference Voltage | 0.800V ±1% (25°C), ±2% (−40°C to +125°C) - sets output voltage accuracy and enables tight regulation of 3.3V/5V/12V rails. |
| Power Good Threshold | 90%–108% of VREF rising, 84%–116% falling - provides robust output validation with hysteresis to reject noise-induced false trips. |
Pinout & Package
MPQ4571GQBE-AEC1-P is housed in a wettable-flank QFN-12 package (2.5mm × 3mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and enhanced solder joint reliability in automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Provides floating gate drive for high-side MOSFET; requires 0.1μF ceramic capacitor between BST and SW. |
| 2 SW | Switch node | High-current path connecting internal HS/LS FETs; must be routed with wide copper trace and minimized loop area. |
| 3 PG | Power good open-drain output | Signals valid regulation status; requires external pull-up to VOUT or VCC for system sequencing and fault reporting. |
| 4 FB | Feedback input | Connects to resistor divider to set output voltage; also used by PG and UVLO circuits for output monitoring. |
| 5 FREQ | Frequency setting input | Resistor-to-GND sets switching frequency; 76.8kΩ = 400kHz, 12.1kΩ = 2.2MHz. |
| 6 VCC | Internal bias supply | Must be decoupled with ≥1μF ceramic capacitor close to pin to stabilize gate drivers and control logic. |
| 7 GND | Power ground | Primary return path; connects to large copper pour tied to input/output capacitor negatives for EMI and thermal performance. |
| 8 IN | Main power input | Accepts full 4.5V–60V range; requires local 10μF+ ceramic input capacitor placed adjacent to pin. |
| 9,10 NC | No connect | Internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding. |
| 11 CCM/SYNCO | Mode select / sync output | Pull to GND via 10kΩ–300kΩ for forced CCM; float for AAM; outputs 180° out-of-phase clock for multi-phase sync. |
| 12 EN | Enable control | Active-high logic input; threshold 1.45V typ; 5μs turn-off delay enables controlled power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-12 package | Enables AOI-compatible solder joint inspection and improves long-term reliability in thermally cycled automotive environments. |
| AAM/CCM light-load mode selectability | Reduces light-load power loss by >40% vs fixed-frequency CCM; maintains efficiency across 10μA–1A load range. |
| Low-dropout mode | Maintains regulation down to VIN = VOUT + 0.4V, supporting cold-crank operation at 4.5V input with 5V output. |
| Hiccup-mode short-circuit protection | Limits average power dissipation during sustained overload, preventing thermal runaway while enabling automatic recovery. |
| Valley-current over-current protection | Detects current at switch turn-on to prevent MOSFET current runaway during pulse-width saturation or inductor saturation. |
| Integrated soft-start (0.45ms) | Prevents inrush current and output overshoot during startup; eliminates need for external timing capacitor. |
Applications
| Automotive Infotainment Power | Automotive LED Headlamp Driver |
|---|---|
|
Use Scenario: Powers SoC, display controller, and audio codec in head-unit systems requiring stable 3.3V/5V rails from 12V battery. IC Role / Device Role / Timing Role: Primary DC-DC regulator with PG signaling for system boot sequencing and brown-out detection. Use Value: AEC-Q100 qualification and 60V input withstand ensure uninterrupted operation during load dump (ISO 7637-2 Pulse 5a). |
Use Scenario: Supplies constant-current LED driver ICs in adaptive front-lighting systems (AFS) with dynamic dimming. IC Role / Device Role / Timing Role: Pre-regulator stepping down battery voltage to optimize efficiency of downstream linear or buck-boost LED controllers. Use Value: 2μA shutdown current extends battery life in parking-mode lighting; low-dropout mode sustains illumination during engine cranking. |
| Automotive Motor Control Supply | Industrial Vehicle Telematics |
|
Use Scenario: Generates 5V rail for MCU, CAN transceiver, and gate driver in electric power steering (EPS) or HVAC blower modules. IC Role / Device Role / Timing Role: High-reliability point-of-load converter with hiccup-mode SCP to survive motor stall-induced shorts. Use Value: Integrated valley-current OCP prevents MOSFET failure during PWM-driven motor phase faults; thermal shutdown auto-recovers after cooling. |
Use Scenario: Powers GPS module, cellular modem, and sensor interface in fleet management telematics units mounted in commercial vehicles. IC Role / Device Role / Timing Role: Input-tolerant primary regulator handling wide-range 9V–32V nominal truck battery with EMI-compliant operation. Use Value: CISPR 25 Class 5 radiated/conducted emissions compliance verified on standard EVB; reduces EMC debug time by >3 weeks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4571GQB-AEC1 | Same die, standard QFN-12 (non-wettable flank); MSL1, no side-wettable leads. | Lacks AOI capability; less suitable for high-reliability automotive production with automated solder-joint inspection. | Select when cost sensitivity outweighs AOI requirement and thermal cycling stress is moderate. |
| TPS54360BQPWPRQ1 | TI part: 3.5–60V input, 3.5A, 100μA IQ, no AAM, no SYNC output, SOIC-8 package. | Higher current but larger footprint; lacks light-load efficiency optimization and multi-phase sync capability. | Choose when higher output current is required and board space allows SOIC-8; not drop-in compatible. |
Compared with MPQ4571GQBE-AEC1-P, the GQB-AEC1 variant trades AOI support for lower cost, while the TPS54360BQPWPRQ1 offers higher current but sacrifices light-load efficiency, synchronization, and compact wettable-flank packaging-making MPQ4571GQBE-AEC1-P optimal for space-constrained, EMI-sensitive, and AOI-mandated automotive designs.
Availability
MPQ4571GQBE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, LED lighting, and motor control applications requiring stable component supply with AEC-Q100 Grade-1 qualification, wettable-flank inspection capability, and extended temperature operation.
Supply support for MPQ4571GQBE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4571 belongs to MPS's automotive-grade DC-DC converter product line, engineered specifically for harsh automotive environments-including cold-crank, load-dump, and extended temperature operation-with integrated protection and AEC-Q100 compliance built into silicon.
FAQ
What is the maximum allowable input voltage for MPQ4571GQBE-AEC1-P?
The absolute maximum input voltage is 65V, but the recommended operating range is 4.5V to 60V. Operation above 60V risks exceeding internal MOSFET breakdown limits and voids AEC-Q100 qualification guarantees. Transient spikes up to 65V are tolerated per ISO 7637-2 Pulse 5a if clamped externally.
Does MPQ4571GQBE-AEC1-P require an external compensation network?
No. The MPQ4571GQBE-AEC1-P features fully internal compensation, eliminating the need for external Type-II or Type-III compensation networks. This reduces BOM count, PCB area, and design iteration time while maintaining stability across all operating conditions.
How does the CCM/SYNCO pin function in synchronization mode?
When configured as a sync output (pin left floating), CCM/SYNCO delivers a 180° out-of-phase clock signal referenced to the internal oscillator. When pulled to GND via resistor, it forces continuous conduction mode. The same pin cannot simultaneously serve as input and output; configuration is mutually exclusive.
What is the thermal performance difference between MPQ4571GQBE-AEC1-P and standard QFN variants?
The wettable flank construction improves thermal resistance by ~5°C/W in θJA (measured on 4-layer JEDEC board) due to enhanced solder joint thermal conduction. On MPS's EVQ4571-QB-00A evaluation board, junction-to-ambient θJA is 45°C/W versus 50°C/W for non-wettable variants under identical airflow conditions.
Can MPQ4571GQBE-AEC1-P operate in dropout mode below 4.5V input?
Yes. Below 4.5V, the device enters low-dropout mode, sustaining regulation with VOUT = VIN − 0.4V typical. This enables operation during automotive cold-crank events where battery voltage dips to 3.2V while maintaining 2.8V output for critical microcontrollers.
Is the PG pin compatible with 1.8V logic systems?
Yes. The PG pin is an open-drain output with 300mV max sink voltage at 4mA. When pulled up to 1.8V via external resistor, it meets VIH/VIL thresholds of 1.8V logic families. No level-shifting circuitry is required for interfacing with low-voltage MCUs.
What failure modes trigger hiccup-mode short-circuit protection?
Hiccup mode activates upon sustained over-current detected by valley-current sensing (e.g., output short, inductor saturation, or excessive load). After three consecutive OCP events within 10ms, the device shuts down for 10ms, then attempts restart-repeating until fault clears or thermal shutdown intervenes.
MPQ4571GQBE-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 12-VFQFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 54V
- Current - Output:
- 1A
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-QFN (2.5x3)
MPQ4571GQBE-AEC1-P FAQ
1.How can I place an order for MPQ4571GQBE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4571GQBE-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 MPQ4571GQBE-AEC1-P reliable?
The price and inventory of MPQ4571GQBE-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 MPQ4571GQBE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4571GQBE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4571GQBE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4571GQBE-AEC1-P?
MPQ4571GQBE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4571GQBE-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 MPQ4571GQBE-AEC1-P?
For technical support, including MPQ4571GQBE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4571GQBE-AEC1-P requirements.
6.How does Aetrix verify that MPQ4571GQBE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4571GQBE-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 MPQ4571GQBE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4571GQBE-AEC1-P?
All MPQ4571GQBE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4571GQBE-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 MPQ4571GQBE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4571GQBE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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