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Monolithic Power Systems Inc. MPQ4561DQ-AEC1-LF-Z
- Part No.:
- MPQ4561DQ-AEC1-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ4561DQ-AEC1-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 1.5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MPQ4561DQ-AEC1-LF-Z from Monolithic Power Systems is an AEC-Q100 qualified, non-synchronous step-down DC/DC converter with integrated 300mΩ high-side MOSFET, delivering up to 1.5A output across a 3.8V–55V input range, programmable 2MHz switching frequency, and 140μA quiescent current-designed for automotive power rails such as infotainment head units and ADAS camera modules.
For engineers reviewing the MPQ4561DQ-AEC1-LF-Z datasheet, MPQ4561DQ-AEC1-LF-Z pinout, MPQ4561DQ-AEC1-LF-Z application, or MPQ4561DQ-AEC1-LF-Z equivalent, key selection criteria include its 12µA shutdown current, external soft-start control via SS pin, 0.8V feedback reference, thermal shutdown at 150°C, and QFN10 (3mm×3mm) package with exposed pad for thermal management.
Technical Context
The MPQ4561DQ-AEC1-LF-Z implements current-mode PWM control with cycle-by-cycle peak current limiting and fixed-frequency operation at up to 2MHz, enabling fast transient response and compact filter design. Its internal error amplifier features 400V/V gain and 120µA/V transconductance, with COMP pin serving as the GM amplifier output for external compensation network connection.
It uses a bootstrap-driven high-side gate driver with dedicated UVLO (2.5V rising threshold), supports pulse-skipping mode under light load to reduce switching losses, and includes frequency foldback during startup and short-circuit conditions to prevent inductor current runaway and ensure fault-tolerant operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 55V - supports direct connection to automotive battery (9V–16V nominal) and industrial 24V/48V rails without pre-regulation. |
| Output Current | Up to 1.5A - sufficient for powering microcontrollers, sensors, and communication ICs in automotive ECUs. |
| Switching Frequency | Programmable up to 2MHz - enables use of small inductors (e.g., 4.7µH–10µH) and avoids AM band EMI interference. |
| Quiescent Current | 140µA - ensures low standby power draw in always-on vehicle subsystems like telematics and body control modules. |
| Feedback Reference | 0.795V (typ.) - sets output voltage accuracy and allows adjustable regulation from 0.8V to 52V using external resistor divider. |
| High-Side RDS(on) | 300mΩ (max) - limits conduction loss at full load, supporting >90% efficiency at 12VIN/3.3VOUT. |
| Thermal Shutdown | 150°C with 20°C hysteresis - provides self-protecting operation under sustained overload or poor PCB thermal layout. |
Pinout & Package
The MPQ4561DQ-AEC1-LF-Z is housed in a thermally enhanced 3mm × 3mm QFN10 package with exposed thermal pad, requiring solder connection to PCB ground plane for optimal junction temperature control and reliability in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch Node | Drain of internal high-side MOSFET; connects to Schottky rectifier cathode and inductor; requires low-inductance layout to minimize ringing. |
| 3 EN | Enable Input | Logic-level control pin with 1.55V rising threshold; floating state enables device via internal 1µA pull-up. |
| 4 COMP | Compensation Output | GM amplifier output; connects to RC network for loop stability tuning and transient response optimization. |
| 5 FB | Feedback Input | Senses output voltage via resistive divider; referenced to 0.795V internal bandgap for precise regulation. |
| 6 GND / Exposed Pad | Power & Signal Ground | Main return path for high-current switching and analog circuits; exposed pad must be soldered to solid GND plane. |
| 7 FREQ | Frequency Programming | Connects to GND via resistor (e.g., 95kΩ for 1MHz); sets oscillator frequency and impacts minimum on-time constraints. |
| 8 SS | Soft-Start Control | Capacitor-to-GND sets ramp time; prevents output overshoot during startup and short-circuit recovery. |
| 9 VIN | Input Supply | Primary power input for control circuitry and high-side driver; requires local 10µF ceramic decoupling. |
| 10 BST | Bootstrap Supply | Charges via external capacitor between BST and SW; supplies floating gate driver for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, meeting automotive reliability and stress-test requirements. |
| External soft-start programming | SS pin accepts capacitor (5.6nF–220nF) to set controlled output ramp rate, preventing inrush current and system reset events. |
| Stable with ceramic output capacitors | No ESR requirement simplifies BOM and improves reliability over tantalum/electrolytic alternatives. |
| 12µA shutdown supply current | Enables ultra-low-power sleep modes in battery-backed systems such as event-data recorders and parking sensors. |
| Frequency foldback protection | Reduces switching frequency during startup and short-circuit to limit peak inductor current and prevent saturation. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in vehicle head units operating from 9V–16V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary buck regulator providing stable 1.1V, 1.8V, and 3.3V rails with tight load regulation and low noise. Use Value: 2MHz operation avoids AM radio band interference; 140µA quiescent current extends battery backup runtime during ignition-off states. | Use Scenario: Supplies image sensor, ISP, and SerDes in rear-view or surround-view cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-input-voltage step-down converter delivering 1.2V core and 2.8V I/O rails with thermal shutdown and UVLO protection. Use Value: AEC-Q100 qualification ensures functional safety compliance; exposed pad QFN10 package maintains <125°C junction temperature under continuous 1.2A load. |
| Industrial Telematics Gateway | Commercial Vehicle Body Control Unit |
Use Scenario: Converts 24V truck battery to 5V and 3.3V for GPS, cellular modem, and CAN transceivers in fleet management systems. IC Role / Device Role / Timing Role: Main power stage with programmable frequency and external soft-start for robust cold-start behavior. Use Value: 55V absolute max input withstands load-dump transients up to 60V; shutdown current <20µA meets ISO 16750-2 Class D requirements. | Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door modules and lighting controllers. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing discrete solutions in space-constrained PCB layouts. Use Value: QFN10 footprint saves >40% board area vs. SOIC-8 alternatives; 300mΩ RDS(on) reduces thermal derating needs at 1A continuous load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4572DQ-AEC1-LF-Z | Successor with improved 2.5A rating, lower 120mΩ RDS(on), and extended 60V input range; pin-compatible but requires updated compensation. | Supports higher current loads (e.g., radar processors) and wider input transients; same AEC-Q100 Grade 1 qualification. | Select for new designs requiring higher output capability or future-proofing against obsolescence. |
| LM61480QRPWRQ1 | Texas Instruments part with 3.5A rating, integrated boot diode, and spread-spectrum EMI reduction; not pin-compatible and requires different layout. | Better suited for high-EMI environments (e.g., EV powertrain proximity); lacks programmable frequency but offers tighter VFB tolerance (±0.5%). | Choose when EMI certification is critical and board redesign is acceptable. |
Compared with MPQ4561DQ-AEC1-LF-Z, MPQ4572DQ-AEC1-LF-Z delivers higher current and efficiency in the same footprint, while LM61480QRPWRQ1 trades pin compatibility for advanced EMI mitigation and higher integration-making MPQ4561 best for cost-sensitive, legacy-compliant automotive upgrades.
Availability
MPQ4561DQ-AEC1-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics gateways requiring stable component supply amid long product lifecycles and stringent qualification requirements.
Supply support for MPQ4561DQ-AEC1-LF-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4561 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-environment power conversion in vehicles-emphasizing wide input range, AEC-Q100 compliance, and robust thermal and EMI performance.
FAQ
What is the maximum recommended output current for MPQ4561DQ-AEC1-LF-Z in automotive applications?
The MPQ4561DQ-AEC1-LF-Z is rated for up to 1.5A continuous output current under AEC-Q100 Grade 1 conditions (–40°C to +125°C ambient). Derating is required above 85°C ambient; at 105°C, maximum sustainable output drops to ~1.1A with proper PCB copper pour and thermal pad soldering per MPS AN-107 layout guidelines.
Can MPQ4561DQ-AEC1-LF-Z operate with a 60V input transient?
No-while the absolute maximum VIN rating is +60V, the recommended operating input range is strictly 3.8V to 55V per datasheet Section 5. Exceeding 55V risks violating safe operating area margins during load dump, and MPS explicitly advises against sustained operation above 55V even for short transients.
Is the MPQ4561DQ-AEC1-LF-Z pin-compatible with MPQ4572DQ-AEC1-LF-Z?
Yes-MPQ4572DQ-AEC1-LF-Z is a direct pin- and footprint-compatible successor. Both use identical QFN10 (3mm×3mm) packages with matching pin functions and assignments. However, compensation network values may require adjustment due to differences in error amplifier transconductance and current-sense gain.
Does MPQ4561DQ-AEC1-LF-Z support synchronous rectification?
No-it is a non-synchronous buck converter requiring an external Schottky diode (e.g., B380-13-F) connected between SW and GND. The internal high-side MOSFET is complemented by external freewheeling diode conduction; no low-side MOSFET driver or sync signal is provided.
What is the minimum on-time specification and its impact on minimum output voltage?
The minimum on-time is 100ns (typ.) at –40°C to +125°C. At 2MHz switching frequency, this limits the practical minimum duty cycle to ~0.2%, constraining the lowest achievable output voltage to approximately 0.8V × (100ns × 2MHz) ≈ 0.16V-though FB reference is fixed at 0.795V, so true regulation starts at 0.8V regardless.
How does the frequency foldback feature behave during startup?
During startup, if inductor current approaches the current limit before output reaches regulation, the MPQ4561DQ-AEC1-LF-Z automatically reduces switching frequency to prevent current runaway. This foldback continues until FB voltage exceeds 0.4V, after which frequency returns to programmed value-ensuring reliable start-up into heavy or shorted loads.
Is RoHS compliance verified for MPQ4561DQ-AEC1-LF-Z?
Yes-the "-LF" suffix confirms lead-free, RoHS-compliant packaging per EU Directive 2011/65/EU. MPS certifies all MPQ4561 variants as green-status components, with full material declarations available on their Quality Assurance portal under document MPQ4561-RoHS-Declaration.
MPQ4561DQ-AEC1-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 3.8V
- Voltage - Input (Max):
- 55V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 52V
- Current - Output:
- 1.5A
- Frequency - Switching:
- Up to 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MPQ4561DQ-AEC1-LF-Z FAQ
1.How can I place an order for MPQ4561DQ-AEC1-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-Z reliable?
The price and inventory of MPQ4561DQ-AEC1-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4561DQ-AEC1-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ4561DQ-AEC1-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4561DQ-AEC1-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4561DQ-AEC1-LF-Z?
MPQ4561DQ-AEC1-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-Z?
For technical support, including MPQ4561DQ-AEC1-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4561DQ-AEC1-LF-Z requirements.
6.How does Aetrix verify that MPQ4561DQ-AEC1-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ4561DQ-AEC1-LF-Z?
All MPQ4561DQ-AEC1-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-Z part is unused and in its original packaging.
Return procedure for MPQ4561DQ-AEC1-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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