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Monolithic Power Systems Inc. MPQ4571GQB-AEC1-P
- Part No.:
- MPQ4571GQB-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-VFQFN
- Datasheet:
-
MPQ4571GQB-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 1A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:623
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Product details
Overview
MPQ4571GQB-AEC1-P from Monolithic Power Systems is a fully integrated, AEC-Q100 Grade-1 qualified synchronous buck converter delivering 1A continuous output current with 4.5V–60V input range, 250mΩ/45mΩ internal MOSFETs, and 40μA quiescent current. It serves as the primary DC-DC power stage in automotive infotainment and LED lamp systems requiring cold-crank operation and low-noise regulation.
For engineers reviewing the MPQ4571GQB-AEC1-P datasheet, MPQ4571GQB-AEC1-P pinout, MPQ4571GQB-AEC1-P application, or MPQ4571GQB-AEC1-P equivalent, key selection criteria include its 2μA shutdown current, AAM/CCM light-load mode selectability, 180° out-of-phase SYNC clock output, and integrated valley-current OCP with hiccup SCP-critical for automotive ECU and ADAS power rail design.
Technical Context
The MPQ4571GQB-AEC1-P employs peak-current-mode control with valley-current detection for over-current protection and integrates both high-side (250mΩ) and low-side (45mΩ) MOSFETs in a single QFN-12 package. Its advanced asynchronous modulation (AAM) dynamically scales switching frequency under light load to minimize gate driver and switching losses.
It supports configurable switching frequency up to 2.2MHz via external resistor on FREQ pin, enables low-dropout operation during automotive cold-crank (VIN down to 4.5V), and provides remote EN control with 1.45V typical enable threshold and 330mV hysteresis for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports full automotive battery range including cold-crank (4.5V) and load-dump (60V) transients. |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and LED drivers in automotive modules. |
| Quiescent Current | 40μA in active mode - enables always-on functionality without excessive battery drain. |
| Shutdown Current | 2μA - meets ultra-low-power requirements for vehicle sleep-mode compliance. |
| FB Reference Voltage | 0.800V ±1% at 25°C - enables precise output regulation with standard resistor-divider feedback networks. |
| Switching Frequency | Configurable 300kHz–2.2MHz - allows optimization of size (higher fSW → smaller inductor) vs. efficiency (lower fSW → lower switching loss). |
| Thermal Shutdown | 170°C with 25°C hysteresis - protects against sustained overload while enabling automatic recovery after cooling. |
Pinout & Package
MPQ4571GQB-AEC1-P is housed in a wettable-flank QFN-12 package (2.5mm × 3mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and thermal performance in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BST | Bootstrap supply | Connects external capacitor between BST and SW to bias high-side gate driver; enables 100% duty cycle capability. |
| 2 SW | Power switch node | Drives external inductor; requires wide copper trace and low-inductance layout to minimize EMI and voltage spikes. |
| 3 PG | Power good indicator | Open-drain output signaling VOUT within ±10% of target (90–108% of VREF); asserts low on fault or UV/OV. |
| 4 FB | Feedback input | Negative input of error amplifier; sets output voltage via resistor divider; also used by PG and UVLO circuits. |
| 5 FREQ | Frequency configuration | Resistor-to-GND sets switching frequency (300kHz–2.2MHz); enables EMI tuning and inductor size optimization. |
| 6 VCC | Bias supply | Internal LDO output; requires ≥1µF ceramic decoupling capacitor close to pin for stable gate drive. |
| 7 GND | Ground reference | Primary IC ground; must connect to large copper pour tied to input/output capacitor negatives for low-impedance return path. |
| 8 IN | Main input supply | Accepts 4.5V–60V; requires local high-frequency ceramic capacitor (≥10µF) placed adjacent to pin for transient suppression. |
| 9,10 NC | No connection | Internally unconnected; recommended to tie to GND for improved thermal dissipation and EMI shielding. |
| 11 CCM/SYNCO | Mode select / sync output | Pull to GND via 10kΩ–300kΩ for forced CCM; floating enables AAM; outputs 180° out-of-phase clock for multi-phase synchronization. |
| 12 EN | Enable control | Active-high logic input (1.45V typ. threshold); float or pull low to disable; supports remote system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | 250mΩ HS + 45mΩ LS RDS(ON) - eliminates need for external Schottky diode and reduces BOM count and board area. |
| AAM light-load efficiency mode | Frequency scaling below 400kHz under light load - reduces switching and gate driver losses, achieving >85% efficiency at 1mA output. |
| Low-dropout cold-crank operation | Supports VIN as low as 4.5V with regulated VOUT - maintains system power during engine start-up when battery dips to 6V. |
| Hiccup-mode short-circuit protection | Auto-restart after fault clearance - prevents thermal runaway during sustained overload while enabling safe recovery without manual reset. |
| Internal compensation network | Single external feedback divider only - eliminates need for external compensation components, simplifying design and improving stability margin. |
Applications
| Automotive Infotainment Power Supply | Automotive LED Headlamp Driver |
|---|---|
|
Use Scenario: Powers SoC, display controller, and audio codec in head-unit systems exposed to wide input transients (cold crank, load dump). IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator with fast transient response and AEC-Q100 reliability certification. Use Value: Maintains stable output during 4.5V cold-crank events and suppresses conducted EMI to meet CISPR25 Class 5 limits without added filtering. |
Use Scenario: Supplies constant-current LED driver ICs in adaptive front-lighting systems (AFS) requiring robust overvoltage and thermal protection. IC Role / Device Role / Timing Role: Pre-regulator stepping 12V/24V battery to 7V–9V intermediate rail for downstream LED controllers. Use Value: Integrated hiccup SCP and 170°C thermal shutdown prevent catastrophic failure during LED string open/short faults. |
| Automotive Body Control Module (BCM) | Industrial CAN Node Power |
|
Use Scenario: Powers microcontroller, LIN transceivers, and sensor interfaces in door modules and seat controllers operating across -40°C to +125°C. IC Role / Device Role / Timing Role: Always-on 3.3V rail generator with 2μA shutdown current for low-power wake-on-LIN functionality. Use Value: AEC-Q100 Grade-1 qualification ensures long-term reliability in under-hood and cabin environments with minimal derating. |
Use Scenario: Provides isolated 5V supply for CAN FD transceivers and microcontrollers in industrial gateways subjected to 48V DC bus fluctuations. IC Role / Device Role / Timing Role: High-input-voltage buck stage converting 36V–60V industrial rail to clean 5V for communication subsystems. Use Value: 60V absolute max input rating and 65V transient tolerance allow direct connection to 48V PoE++ or telecom power buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Higher 3.5A output, fixed 2.1MHz fSW, no AAM mode, larger HTSSOP-16 package | Better suited for higher-current ADAS camera modules; lacks light-load efficiency optimization | Select when >1.5A output or fixed high-frequency operation is required; avoid if battery life or EMI sensitivity is critical. |
| TPS543B20 | 30V max input, 3A output, PMBus interface, 3.5mm × 3.5mm QFN, no AEC-Q100 grade | Targeted at server/compute power; lacks automotive qualification and cold-crank support | Only viable for non-automotive industrial use; not suitable for automotive OEM designs requiring AEC-Q100 compliance. |
Compared with LM61480-Q1 and TPS543B20, MPQ4571GQB-AEC1-P uniquely balances 1A output, 60V input, AEC-Q100 Grade-1 qualification, and AAM-based light-load efficiency-making it optimal for cost-sensitive, space-constrained automotive body electronics where standby current and transient resilience are prioritized over raw current capacity.
Availability
MPQ4571GQB-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, LED lighting, body control modules, and industrial CAN node power supplies requiring stable component supply with AEC-Q100 assurance and long-lifecycle support.
Supply support for MPQ4571GQB-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 core expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPQ4571 product line delivers compact, AEC-Q100-qualified buck converters targeting automotive subsystems needing wide-input, low-quiescent-current, and robust protection features-designed specifically for infotainment, lighting, and body electronics.
FAQ
What is the minimum input voltage required for regulation during cold-crank conditions?
The MPQ4571GQB-AEC1-P maintains regulation down to 4.5V input with low-dropout mode enabled, supporting automotive cold-crank events where battery voltage dips to 6V nominal. Its UVLO rising threshold is 4.0V (±0.2V), ensuring reliable startup once voltage recovers above this point.
Does MPQ4571GQB-AEC1-P require external compensation components?
No. The device integrates full internal compensation, requiring only an external resistor divider on the FB pin to set output voltage. This eliminates external Type-II or Type-III compensation networks, reducing design complexity and PCB footprint.
How does the CCM/SYNCO pin function in synchronization applications?
When configured as SYNC output (floating), CCM/SYNCO delivers a 180° out-of-phase clock signal synchronized to the internal oscillator. When pulled to GND via 10kΩ–300kΩ, it forces continuous conduction mode (CCM); this dual-role pin enables multi-phase interleaving or deterministic light-load behavior.
What protection features are implemented for short-circuit conditions?
The device implements valley-current detection OCP and hiccup-mode short-circuit protection (SCP). Upon overcurrent, it enters current-limiting, then shuts down and auto-restarts after thermal recovery-preventing sustained fault currents and enabling safe operation without external circuit breaker components.
Is the MPQ4571GQB-AEC1-P compatible with wettable flank solder inspection?
Yes. The QFN-12 package features wettable flanks, allowing automated optical inspection (AOI) of solder joints on all side pins. This meets IPC-A-610 Class 3 requirements for automotive production and ensures high-yield reflow assembly in safety-critical applications.
What is the maximum achievable switching frequency and how is it set?
The maximum switching frequency is 2.2MHz, achieved by connecting a 12.1kΩ resistor from FREQ pin to GND. Frequency scales inversely with resistor value: 76.8kΩ yields 400kHz, 28kΩ yields 1MHz, and 12.1kΩ yields 2.2MHz-enabling trade-offs between inductor size and efficiency.
How does the device handle input voltage transients such as load dump?
The MPQ4571GQB-AEC1-P has 65V absolute maximum input rating and operates continuously up to 60V. During load dump (e.g., 48V surge), its internal UVLO and thermal protection remain active, and the integrated MOSFETs withstand the transient without latch-up or damage when properly decoupled per layout guidelines.
MPQ4571GQB-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
- Supplier Device Package:
- 12-QFN (2.5x3)
MPQ4571GQB-AEC1-P FAQ
1.How can I place an order for MPQ4571GQB-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4571GQB-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 MPQ4571GQB-AEC1-P reliable?
The price and inventory of MPQ4571GQB-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 MPQ4571GQB-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4571GQB-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4571GQB-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4571GQB-AEC1-P?
MPQ4571GQB-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4571GQB-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 MPQ4571GQB-AEC1-P?
For technical support, including MPQ4571GQB-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4571GQB-AEC1-P requirements.
6.How does Aetrix verify that MPQ4571GQB-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4571GQB-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 MPQ4571GQB-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4571GQB-AEC1-P?
All MPQ4571GQB-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4571GQB-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 MPQ4571GQB-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4571GQB-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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