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Monolithic Power Systems Inc. MPQ4571GQBE-AEC1-Z
- Part No.:
- MPQ4571GQBE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 12-VFQFN
- Datasheet:
-
MPQ4571GQBE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,196
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Product details
Overview
MPQ4571GQBE-AEC1-Z 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, 2μA shutdown quiescent current, and internal 250mΩ/45mΩ MOSFETs. It operates in automotive infotainment power rails where cold-crank (4.5V) and load-dump (60V) transients occur.
For engineers reviewing the MPQ4571GQBE-AEC1-Z datasheet, MPQ4571GQBE-AEC1-Z pinout, MPQ4571GQBE-AEC1-Z application, or MPQ4571GQBE-AEC1-Z equivalent, key selection criteria include AEC-Q100 qualification, wettable flank QFN-12 package for solder joint inspection, valley-current OCP with hiccup SCP, and 180° out-of-phase SYNC clock output for multi-rail synchronization.
Technical Context
The MPQ4571GQBE-AEC1-Z employs peak-current-mode control with valley-current over-current protection and zero-cross detection for accurate light-load regulation. Its advanced asynchronous modulation (AAM) dynamically scales switching frequency below 400kHz under light loads to minimize gate driver and switching losses.
It integrates internal compensation, soft-start (0.45ms), power-good (PG) with ±16% window, and low-dropout mode enabling stable operation down to 4.5V input-critical for automotive cold-crank conditions. The CCM/SYNCO pin supports both forced continuous conduction mode and 180° phase-shifted clock output for synchronized multi-converter systems.
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) events |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and display logic in automotive modules |
| Quiescent Current | 40μA typical - enables always-on subsystems without excessive battery drain |
| Shutdown Current | 2μA - meets ultra-low-power requirements for vehicle sleep-mode compliance |
| Switching Frequency | Configurable 300kHz–2.2MHz via external resistor - allows EMI optimization and compact magnetics selection |
| FB Reference Voltage | 0.800V ±1% at 25°C - enables precise output regulation with standard resistor dividers |
| Thermal Shutdown | 170°C with 25°C hysteresis - protects against sustained overload in enclosed automotive enclosures |
Pinout & Package
MPQ4571GQBE-AEC1-Z is housed in a wettable flank QFN-12 package (2.5mm × 3mm), enabling automated optical solder-joint inspection per automotive manufacturing standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Connects external capacitor between BST and SW to bias high-side gate driver during HS-FET conduction |
| SW | Power switch node | Drives external inductor; requires wide PCB trace and low-inductance layout to minimize ringing |
| PG | Power-good indicator | Open-drain output asserting high when VOUT is within 90–108% of target; pulls low at <84% or >116% |
| FB | Feedback input | Negative input of error amplifier; connects to resistor divider to set output voltage and enable PG/UVLO monitoring |
| FREQ | Frequency setting | Resistor-to-GND sets switching frequency from 300kHz to 2.2MHz for EMI and size trade-offs |
| VCC | Internal bias supply | Requires ≥1µF ceramic decoupling capacitor close to pin for stable gate drive and control circuitry |
| GND | Ground reference | Primary thermal and signal return; must connect to large copper pour tied to input/output capacitors |
| IN | Main power input | Accepts 4.5V–60V; requires local ceramic capacitor to suppress switching noise and transients |
| EN | Enable control | Active-high logic input; threshold 1.45V typical; floating or low disables converter and reduces IQ to 2μA |
| CCM/SYNCO | Mode select & sync output | Pull to GND via 10k–300kΩ for forced CCM; float for AAM; outputs 180° out-of-phase clock for multi-rail sync |
| NC (9,10) | No connection | Internally unconnected; recommended to tie to GND for improved thermal dissipation and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-12 | Enables automated X-ray and AOI inspection of solder joints per IATF 16949 requirements |
| AEC-Q100 Grade-1 qualification | Rated for -40°C to +125°C junction temperature - validated for under-hood and infotainment applications |
| Valley-current OCP with hiccup SCP | Detects overcurrent at switch turn-off point and enters safe restart cycle on short-circuit, preventing thermal runaway |
| Low-dropout mode | Maintains regulation down to VIN = 4.5V with minimal duty-cycle loss - essential for cold-crank survival |
| 180° out-of-phase SYNC clock | Reduces input ripple current in multi-converter systems by interleaving phases without external timing controller |
| Internal compensation | Eliminates need for external Type-II/III compensation network - reduces BOM count and layout sensitivity |
Applications
| Automotive Infotainment | Automotive LED Lighting |
|---|---|
Use Scenario: Powering head-unit SoCs, audio DSPs, and touch controllers in 12V/24V vehicle architectures. IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator with AEC-Q100 qualification and cold-crank support. Use Value: Maintains stable output during 4.5V cold-crank dips and 60V load-dump spikes without brownout or shutdown. | Use Scenario: Driving backlight LEDs and ambient lighting modules requiring regulated DC-DC conversion. IC Role / Device Role / Timing Role: Constant-voltage buck stage feeding LED driver ICs or PWM dimming circuits. Use Value: Delivers 1A at >90% efficiency across 8V–48V input range, minimizing thermal stress in sealed lamp housings. |
| Automotive Motor Control | Industrial Vehicle Telematics |
Use Scenario: Supplying gate drivers, position sensors, and MCU peripherals in EPS, HVAC blower, or seat motor modules. IC Role / Device Role / Timing Role: High-reliability intermediate rail generator with hiccup-mode SCP to survive motor stall faults. Use Value: Valley-current OCP prevents false triggering during high di/dt motor startup; PG signal enables system-level fault logging. | Use Scenario: Powering LTE/CAN modules, GNSS receivers, and secure boot MCUs in fleet management gateways. IC Role / Device Role / Timing Role: Always-on auxiliary rail with 2μA shutdown current and robust UVLO hysteresis (500mV). Use Value: Extends battery runtime in disconnected vehicles while maintaining fast wake-up response via EN-controlled sequencing. |
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 | 4.5V–60V input, 1A, but uses external compensation and lacks wettable flank package | Requires additional compensation components and manual solder-joint inspection | Preferred when design already uses TI ecosystem tools and external compensation is acceptable |
| TPS543B20 | 4.5V–20V input only; not rated for 60V load-dump; supports PMBus but no AEC-Q100 Grade-1 | Limited to low-voltage automotive domains (e.g., ADAS cameras), not under-hood or chassis systems | Select only for non-critical 12V subsystems where digital interface outweighs voltage rating needs |
Compared with LM61480-Q1 and TPS543B20, MPQ4571GQBE-AEC1-Z uniquely combines AEC-Q100 Grade-1, wettable flank QFN, internal compensation, and 60V transient tolerance-making it the only drop-in solution for space-constrained, high-reliability automotive power rails requiring automated optical inspection and cold-crank resilience.
Availability
MPQ4571GQBE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, LED lighting, and motor control applications requiring stable component supply, AEC-Q100 compliance, and wettable flank packaging for production traceability.
Supply support for MPQ4571GQBE-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 for automotive, industrial, and consumer markets.
The MPQ4571 product line delivers high-efficiency, AEC-Q100-qualified buck converters targeting automotive subsystems that demand ultra-low IQ, wide VIN range, and robust protection features in compact packages.
FAQ
What is the purpose of the CCM/SYNCO pin?
The CCM/SYNCO pin serves dual functions: pulling it to GND via 10kΩ–300kΩ selects forced continuous conduction mode, while leaving it floating enables advanced asynchronous modulation (AAM) at light loads. It also outputs a 180° out-of-phase clock signal to synchronize multiple converters and reduce input ripple current.
How does the MPQ4571GQBE-AEC1-Z handle cold-crank conditions?
It maintains regulation down to 4.5V input via low-dropout mode, which maximizes duty cycle without compromising stability. Combined with valley-current OCP and 170°C thermal shutdown, it survives extended cold-crank events while keeping downstream electronics powered and functional.
Is external compensation required?
No. The MPQ4571GQBE-AEC1-Z features internal compensation, eliminating external Type-II or Type-III networks. This reduces bill-of-materials count, simplifies layout, and improves production yield-especially critical in automotive applications with tight space constraints.
What distinguishes the "E" suffix in MPQ4571GQBE-AEC1-Z?
The "E" denotes the wettable flank variant of the QFN-12 package. Unlike standard QFN, its side-wettable leads allow automated optical inspection (AOI) of solder joints-a mandatory requirement for IATF 16949-compliant automotive manufacturing lines.
Does the device support power sequencing with other rails?
Yes. The EN pin provides precise enable/disable control with 1.45V typical threshold and 330mV hysteresis, while the open-drain PG output signals valid regulation status. These features enable robust power sequencing in multi-rail systems such as infotainment head units or telematics gateways.
What protection features are integrated?
Integrated protections include valley-current over-current protection (OCP), hiccup-mode short-circuit protection (SCP), input under-voltage lockout (UVLO) with 500mV hysteresis, auto-recovery thermal shutdown (170°C), and output over-voltage detection via PG flag-ensuring robust operation across automotive environmental stresses.
Can the switching frequency be synchronized to an external clock?
No-the CCM/SYNCO pin functions only as an output (180° out-of-phase clock) or mode-select input. It does not accept external synchronization signals. For master-slave synchronization, use the SYNCO output to drive the FREQ pin of a second MPQ4571 or compatible device.
MPQ4571GQBE-AEC1-Z 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-Z FAQ
1.How can I place an order for MPQ4571GQBE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4571GQBE-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 MPQ4571GQBE-AEC1-Z reliable?
The price and inventory of MPQ4571GQBE-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 MPQ4571GQBE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4571GQBE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4571GQBE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4571GQBE-AEC1-Z?
MPQ4571GQBE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4571GQBE-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 MPQ4571GQBE-AEC1-Z?
For technical support, including MPQ4571GQBE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4571GQBE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4571GQBE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4571GQBE-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 MPQ4571GQBE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4571GQBE-AEC1-Z?
All MPQ4571GQBE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4571GQBE-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 MPQ4571GQBE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4571GQBE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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