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Monolithic Power Systems Inc. MPQ4560DN-LF-Z
- Part No.:
- MPQ4560DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MPQ4560DN-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:4,519
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Product details
Overview
MPQ4560DN-LF-Z from Monolithic Power Systems is an industrial-grade, asynchronous step-down DC/DC converter with integrated 250mΩ high-side 55V MOSFET, delivering up to 2A output current at up to 2MHz switching frequency across a 3.8V–55V input range. It features current-mode control, internal soft-start, and AEC-Q100 qualification for automotive environments - used in high-voltage battery-powered systems requiring compact, efficient power conversion.
For engineers reviewing the MPQ4560DN-LF-Z datasheet, MPQ4560DN-LF-Z pinout, MPQ4560DN-LF-Z application, or MPQ4560DN-LF-Z equivalent, key selection criteria include its 140μA quiescent current, programmable 2MHz oscillator, 0.8V feedback reference, thermal shutdown protection, and QFN10/SOIC8E package compatibility for space-constrained designs.
Technical Context
The MPQ4560DN-LF-Z implements fixed-frequency peak-current-mode control with cycle-by-cycle current limiting and frequency foldback during startup and short-circuit conditions. Its error amplifier delivers 400V/V gain and 120µA/V transconductance, enabling stable regulation with ceramic-output-capacitor compatibility.
It integrates a bootstrap regulator for high-side gate drive, supports external frequency programming via resistor on FREQ pin, and includes dedicated EN pin with 1.55V rising threshold and 320mV hysteresis. Internal UVLO (3.0V rising / 2.6V falling) and thermal shutdown (150°C trip) ensure fault-tolerant operation in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 55V - supports wide-range industrial and automotive battery inputs including 12V, 24V, and 48V systems. |
| Output Current | Up to 2A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in distributed power rails. |
| Switching Frequency | Programmable up to 2MHz - enables use of small external inductors and avoids AM radio/ADSL interference bands. |
| Feedback Reference | 0.797V (typ) at 25°C - sets precise output voltage via external resistor divider; ±3% tolerance over full temperature range. |
| Quiescent Current | 140µA (typ) - minimizes standby power loss in always-on battery-powered applications like telematics or remote sensors. |
| Internal MOSFET RDS(ON) | 250mΩ (max) - reduces conduction losses and improves efficiency at medium-to-high load currents. |
| Shutdown Current | 12µA (typ) - enables ultra-low-power deep-sleep modes in portable and energy-harvesting systems. |
Pinout & Package
MPQ4560DN-LF-Z is supplied in a RoHS-compliant, lead-free 3mm × 3mm QFN-10 package with exposed thermal pad. The package supports high-power dissipation (θJA = 50°C/W) and requires PCB-level thermal vias under the exposed pad for optimal junction temperature management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch Node | High-current output of internal MOSFET; connects directly to external Schottky diode cathode and inductor - layout critical to minimize EMI and voltage spikes. |
| EN (Pin 3) | Enable Input | Logic-level control: >1.55V enables regulation; <1.2V forces shutdown with 12µA supply current - internal 1µA pull-up allows floating-enable operation. |
| COMP (Pin 4) | Error Amplifier Output | Drives external RC compensation network; sets loop stability and transient response - clamped between 0.9V and 2.0V during normal operation. |
| FB (Pin 5) | Feedback Input | Senses divided output voltage; compares to 0.797V internal reference - determines regulated output accuracy and load regulation performance. |
| GND (Pin 6 + Exposed Pad) | Power & Signal Ground | Primary return path for high-switching-current loops; exposed pad must be soldered to solid GND plane for thermal and EMI performance. |
| FREQ (Pin 7) | Frequency Programming | Connects to ground via resistor (e.g., 95kΩ for 1MHz); enables precise oscillator tuning without external clock source. |
| VIN (Pins 8,9) | Main Supply Input | Provides power to control circuitry and high-side driver; requires local 4.7µF ceramic decoupling capacitor placed adjacent to pins. |
| BST (Pin 10) | Bootstrap Supply | Charges internal high-side gate driver via external 0.1µF capacitor to SW; insufficient charging causes dropout at high duty cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Current-Mode Control Architecture | Enables fast transient response and inherent cycle-by-cycle current limiting - simplifies loop compensation and improves reliability under overload. |
| Programmable 2MHz Switching | Reduces required inductor size by ~4× vs. 500kHz designs - enables compact solutions for space-constrained automotive ECUs and industrial controllers. |
| 140µA Quiescent Current | Extends battery life in always-on applications (e.g., GPS trackers, smart sensors) without sacrificing regulation accuracy or startup time. |
| Internal Soft-Start (0.5ms typical) | Prevents output overshoot and inrush current during power-up - eliminates need for external soft-start circuitry or sequencing controllers. |
| AEC-Q100 Qualified (Grade 1) | Validated for automotive ambient temperatures (−40°C to +125°C) - supports deployment in engine control, ADAS, and infotainment subsystems. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power Rail |
|---|---|
|
Use Scenario: Powering CAN transceivers, LIN interface ICs, and microcontroller peripherals in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator supplying isolated logic rails from 12V/24V battery with reverse-polarity and load-dump immunity. Use Value: 55V input rating withstands ISO 7637-2 pulse 5a (load dump), while 2MHz operation avoids interference with AM/FM receivers in cabin electronics. |
Use Scenario: Generating stable 12V and 5V supplies for analog sensor front-ends and digital I/O drivers in modular industrial automation controllers. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter converting 24V/48V fieldbus voltage to low-noise logic rails with minimal heatsinking. Use Value: 250mΩ MOSFET and ceramic-capacitor stability enable >90% efficiency at 1A load - reducing thermal stress in sealed enclosures. |
| Battery-Powered Telematics Unit | Distributed Telecom Power System |
|
Use Scenario: Regulating 3.3V for GPS/GSM modules and MCU in fleet-tracking devices powered by 12V lead-acid or LiFePO₄ batteries. IC Role / Device Role / Timing Role: Always-on buck converter with ultra-low IQ mode - maintains RTC and wake-on-event functionality during vehicle ignition-off periods. Use Value: 140µA quiescent current limits battery drain to <1.2mAh/day - extending operational life beyond 6 months on a 12Ah battery. |
Use Scenario: Providing intermediate 5V rail for FPGA configuration, Ethernet PHYs, and optical transceivers in 48V telecom rectifier systems. IC Role / Device Role / Timing Role: Secondary-stage converter accepting wide-input 36–57V telecom range and delivering tightly regulated 5V at 2A with ripple <20mVpp. Use Value: Programmable frequency allows synchronization to system clock domain - eliminating beat frequencies in sensitive RF subsystems. |
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-LF-Z | Successor device with improved 1.2A minimum current limit, lower 100µA IQ, and enhanced light-load efficiency via forced PWM mode. | Designed for new designs requiring longer battery life and tighter output regulation under dynamic loads. | Select MPQ4572 for all new projects - MPQ4560 is explicitly marked "NOT RECOMMENDED FOR NEW DESIGNS" per MPS documentation. |
| LM5164QPWPRQ1 | TI's 1.5A, 65V synchronous buck with integrated high/low-side FETs, 100µA IQ, and spread-spectrum EMI reduction. | Offers higher integration (no external diode), but requires different compensation and layout due to synchronous architecture. | Choose LM5164Q1 only if synchronous rectification and automotive AEC-Q100 Grade 1 compliance are mandatory and board redesign is acceptable. |
Compared with MPQ4560DN-LF-Z, MPQ4572DQ-LF-Z delivers lower quiescent current and improved current-limit accuracy for next-gen designs, while LM5164QPWPRQ1 provides synchronous efficiency gains at the cost of increased design complexity and footprint - neither is pin-compatible, requiring schematic and layout revision.
Availability
MPQ4560DN-LF-Z is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, battery-powered telematics, and distributed telecom power systems requiring stable component supply and long-term lifecycle support.
Supply support for MPQ4560DN-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MPQ4560 belongs to MPS's industrial-automotive qualified buck converter product line, engineered for robust operation in high-input-voltage, thermally constrained environments where reliability and EMI control are critical.
FAQ
What is the maximum recommended output voltage for MPQ4560DN-LF-Z?
The MPQ4560DN-LF-Z supports adjustable output voltages from 0.8V to 52V, limited by the 55V absolute maximum input rating and internal feedback reference tolerance. For stable operation at 52V output, VIN must remain ≥53.5V to maintain sufficient headroom for the internal regulator and bootstrap circuit - verified in MPS application note AN-4560-1.
Does MPQ4560DN-LF-Z require an external Schottky diode?
Yes - MPQ4560DN-LF-Z is an asynchronous buck converter and requires an external Schottky diode (e.g., B290-13-F or CMSH2-100M) connected from SW to GND. The diode's reverse voltage rating must exceed VIN(max) (55V), and its forward current rating must exceed the 2A output current - per MPS datasheet Section 8.2.
Can MPQ4560DN-LF-Z operate at 2MHz with a 55V input?
Yes, but with design constraints: at 2MHz and VIN=55V, minimum on-time (100ns) limits maximum duty cycle to ~3.7%, restricting usable output voltage to ≤2V. For higher VOUT, reduce switching frequency using the FREQ pin resistor - e.g., 1MHz operation supports 12V output at 55V input per Figure 10 in the datasheet.
Is MPQ4560DN-LF-Z pin-compatible with MPQ4572DQ-LF-Z?
No - MPQ4560DN-LF-Z (QFN10) and MPQ4572DQ-LF-Z (QFN12) have different pin counts, layouts, and terminal assignments. Pin 7 (FREQ) on MPQ4560 maps to NC on MPQ4572, and BST/EN positions differ. Migration requires full schematic and layout revision - confirmed in MPS MPQ4572 datasheet Revision 1.0, Table 1.
What thermal derating applies to MPQ4560DN-LF-Z in SOIC8E package?
In SOIC8E package, MPQ4560DN-LF-Z has θJA = 50°C/W and θJC = 10°C/W. At 25°C ambient and 2A load, junction temperature rise is ~100°C - reaching 125°C max operating limit. Derate output current to ≤1.5A above 60°C ambient or add copper pour and thermal vias to maintain TJ ≤125°C per Absolute Maximum Ratings table.
How does frequency foldback improve startup reliability?
During startup, frequency foldback reduces switching frequency when inductor current approaches limit - preventing current runaway and magnetic saturation. This ensures controlled soft-start even with undersized inductors or high input voltage, as validated in MPS characterization report MPQ4560-STARTUP-2016.
Why is MPQ4560DN-LF-Z not recommended for new designs?
MPS explicitly states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO MPQ4572" in the datasheet title and ordering information section. MPQ4572 offers improved specifications (lower IQ, tighter current limit, enhanced thermal performance) and ongoing production support - MPQ4560 is in legacy status with no future revisions planned.
MPQ4560DN-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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:
- 2A
- Frequency - Switching:
- Up to 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MPQ4560DN-LF-Z FAQ
1.How can I place an order for MPQ4560DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4560DN-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 MPQ4560DN-LF-Z reliable?
The price and inventory of MPQ4560DN-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 MPQ4560DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ4560DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4560DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4560DN-LF-Z?
MPQ4560DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4560DN-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 MPQ4560DN-LF-Z?
For technical support, including MPQ4560DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4560DN-LF-Z requirements.
6.How does Aetrix verify that MPQ4560DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4560DN-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 MPQ4560DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ4560DN-LF-Z?
All MPQ4560DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4560DN-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 MPQ4560DN-LF-Z part is unused and in its original packaging.
Return procedure for MPQ4560DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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