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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MPQ4560DQ-LF-Z

Name: MPQ4560DQ-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4560DQ-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4560DQ-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: MPQ4560DQ-LF-Z.pdf

Description:: IC REG BUCK ADJ 2A 10QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ4560DQ-LF-Z from Monolithic Power Systems is an industrial-grade, AEC-Q100 qualified, asynchronous step-down DC/DC converter with integrated 250mΩ high-side MOSFET, delivering up to 2A output current across a 3.8V–55V input range and adjustable 0.8V–52V output. It operates at up to 2MHz switching frequency with current-mode control, internal soft-start, and thermal shutdown-designed for automotive power rails, industrial distributed supplies, and battery-powered systems requiring high-voltage conversion.

For engineers reviewing the MPQ4560DQ-LF-Z datasheet, MPQ4560DQ-LF-Z pinout, MPQ4560DQ-LF-Z application, or MPQ4560DQ-LF-Z equivalent, key selection criteria include its 2MHz programmable frequency, 140μA quiescent current in active mode, 12μA shutdown supply current, ceramic-capacitor stability, and dual QFN10/SOIC8E package options-critical for EMI-sensitive AM radio/ADSL designs and space-constrained automotive modules.

Technical Context

The MPQ4560DQ-LF-Z implements fixed-frequency peak-current-mode control with cycle-by-cycle current limiting and programmable oscillator (via external FREQ resistor), enabling fast transient response and stable regulation across wide VIN/VOUT combinations. Its internal error amplifier features 400V/V voltage gain and 120μA/V transconductance, with COMP pin directly driving loop compensation networks.

Bootstrap charging relies on external BST–SW capacitor and internal floating regulator (~5V), with UVLO protection (2.2V rising threshold, 150mV hysteresis) and minimum on/off times (100ns each) constraining duty-cycle operation above ~95% at 2MHz. Frequency foldback and thermal shutdown (150°C trip, 20°C hysteresis) ensure fault tolerance during startup or overload.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.8V to 55V - supports 12V/24V/48V automotive and industrial bus inputs without pre-regulation
Output Current	Up to 2A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in harsh environments
Switching Frequency	Programmable up to 2MHz - enables compact magnetics and avoids AM band interference (530–1710kHz)
Quiescent Current	140μA at no load - extends battery life in always-on telematics or remote monitoring nodes
Feedback Reference	0.797V ±2.5% - sets output accuracy via external resistor divider; enables precise 3.3V/5V/12V rail generation
Internal MOSFET R_DS(ON)	250mΩ max at 25°C - reduces conduction loss and thermal stress in high-current 12V→3.3V conversion
Shutdown Current	12μA typical - ensures ultra-low leakage during system sleep modes

Pinout & Package

MPQ4560DQ-LF-Z is housed in a thermally enhanced 3mm × 3mm QFN10 package with exposed thermal pad. Pin assignments are validated per Monolithic Power Systems Rev. 1.1 datasheet (May 2016).

Pin/Terminal	Circuit Role	Design Meaning
1, 2 (SW)	Switch Node	High-current output of internal MOSFET; requires low-V_F Schottky diode to GND and tight layout to minimize ringing
3 (EN)	Enable Input	Logic-level control: >1.55V enables, <1.4V disables; internal 1µA pull-up allows floating-enable operation
4 (COMP)	Error Amplifier Output	Drives external RC compensation network; clamped between 0.9V–2.0V; critical for loop stability and transient response
5 (FB)	Feedback Input	Senses resistive divider output; compares to 0.797V reference to regulate V_OUT with ±2.5% accuracy
6 (GND + Exposed Pad)	Power & Signal Ground	Primary return path for switch current and control circuits; exposed pad must be soldered to PCB ground plane for thermal performance
7 (FREQ)	Frequency Programming	Connects external resistor to GND to set f_SW; 95kΩ yields ~1MHz, enabling precise EMI tuning
8, 9 (VIN)	Input Supply	Powers internal regulators, gate drivers, and control logic; requires local 4.7µF ceramic decoupling
10 (BST)	Bootstrap Supply	Charges internal high-side driver via external capacitor to SW; mandates low-ESR 0.1µF ceramic between BST–SW

Key Features

Feature	Design Value
Industrial-Automotive Temp Range	Rated for –40°C to +125°C junction operation - suitable for under-hood and factory-floor deployments
Ceramic Capacitor Stability	Stable with low-ESR MLCCs only - eliminates need for bulk tantalum/electrolytic, reducing board area and aging risk
Internal Soft-Start	0.19–0.5ms ramp time - prevents output overshoot and inrush current during cold start or short-circuit recovery
Thermal Shutdown Protection	150°C trip with 20°C hysteresis - autonomously disables switching and recovers without external intervention
AEC-Q100 Qualified	Grade 1 compliance (–40°C to +125°C) - meets automotive reliability requirements for non-safety-critical power rails

Applications

Automotive Infotainment Power

Industrial PLC I/O Module

Use Scenario: Powering 3.3V SoC, display controller, and CAN transceiver from 12V/24V vehicle battery with stop-start cycling.

IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 3.3V rail with 2MHz switching to avoid AM radio band interference.

Use Value: 140μA quiescent current minimizes parasitic drain during ignition-off; AEC-Q100 qualification ensures reliability across temperature extremes.

Use Scenario: Generating isolated 5V and 12V auxiliary rails inside DIN-rail mounted programmable logic controllers.

IC Role / Device Role / Timing Role: High-input-voltage step-down stage converting 48V backplane to 5V logic supply with minimal external components.

Use Value: 55V absolute max input rating accommodates 48V transients; 250mΩ R_DS(ON) sustains >90% efficiency at full 2A load.

Battery-Powered Telematics

Distributed Telecom Power

Use Scenario: Long-life GPS tracker powered by Li-ion or lead-acid battery with intermittent cellular transmission bursts.

IC Role / Device Role / Timing Role: Main system regulator operating in pulse-skipping mode at light loads to extend runtime.

Use Value: 12μA shutdown current preserves battery charge over months of standby; wide VIN range supports 3.8V–55V battery chemistries and chargers.

Use Scenario: Point-of-load conversion in 48V telecom equipment where space and EMI are constrained.

IC Role / Device Role / Timing Role: Compact 2MHz buck converter feeding FPGA or DSP core with low-noise 1.2V supply.

Use Value: 3mm×3mm QFN10 footprint saves PCB real estate; frequency foldback prevents inductor saturation during hot-plug events.

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 efficiency, lower IQ (100μA), and extended 60V input rating	Designed for new designs requiring longer product lifecycle and higher reliability margin	Select MPQ4572 for all new projects; MPQ4560 remains viable for legacy BOM continuity
LM5164QPWPRQ1	TI part with 65V input, 1.5A output, and integrated bootstrap diode - no external BST cap required	Better suited for ultra-high-VIN (>55V) or low-component-count designs where BST complexity must be eliminated	Choose LM5164Q1 when bootstrap management overhead is unacceptable or VIN exceeds 55V

Compared with MPQ4560DQ-LF-Z, MPQ4572 offers higher input voltage margin and lower quiescent current for next-gen automotive designs, while LM5164QPWPRQ1 simplifies layout with integrated bootstrap diode but trades off output current capability and package size.

Availability

MPQ4560DQ-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment power, industrial PLC I/O modules, and battery-powered telematics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ4560DQ-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 MPQ4560 belongs to MPS's industrial-automotive DC/DC converter product line, engineered for robust high-voltage step-down conversion in harsh environments where reliability, thermal resilience, and EMI control are mandatory.

FAQ

What is the maximum recommended output current for MPQ4560DQ-LF-Z at 125°C ambient?

At +125°C ambient with proper PCB thermal design (2-layer board, 1-in² copper pour under exposed pad), the MPQ4560DQ-LF-Z delivers up to 1.4A continuous output due to thermal derating from its 2.5W θ_JA = 50°C/W rating. Full 2A operation requires ≤85°C ambient or enhanced 4-layer thermal layout.

Can MPQ4560DQ-LF-Z operate with a 2.5V input supply?

No. The MPQ4560DQ-LF-Z has a minimum operating input voltage of 3.8V and an under-voltage lockout (UVLO) rising threshold of 3.0V. Operation below 3.8V violates recommended conditions and will result in unregulated output or shutdown.

Is an external bootstrap diode required for 2MHz operation?

An external bootstrap diode is recommended when operating at 2MHz with high duty cycles (V_OUT/V_IN > 65%) or low input voltages (≤5V), as internal bootstrap charging may become insufficient. For standard 12V→3.3V at 2MHz, the internal circuitry suffices with proper 0.1µF BST–SW capacitor placement.

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 allows safe soft-start into heavy or shorted loads without triggering immediate current-limit shutdown or thermal fault.

What is the purpose of the COMP pin voltage clamping at 0.9V and 2.0V?

The COMP pin is clamped between 0.9V and 2.0V to prevent error amplifier saturation and ensure linear control region operation. This maintains loop stability during large transients and guarantees monotonic response during soft-start and load steps without overshoot or oscillation.

Does MPQ4560DQ-LF-Z support synchronous rectification?

No. MPQ4560DQ-LF-Z is an asynchronous buck converter requiring an external Schottky diode for freewheeling. It lacks a low-side MOSFET driver or synchronous control logic-unlike MPS's MPQ4572, which supports optional sync mode via external FET.

MPQ4560DQ-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:: 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:: 10-QFN (3x3)

MPQ4560DQ-LF-Z FAQ

1.How can I place an order for MPQ4560DQ-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4560DQ-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 MPQ4560DQ-LF-Z reliable?

The price and inventory of MPQ4560DQ-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 MPQ4560DQ-LF-Z is usually 5 days.

3.What payment methods are accepted for MPQ4560DQ-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4560DQ-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4560DQ-LF-Z?

MPQ4560DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4560DQ-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 MPQ4560DQ-LF-Z?

For technical support, including MPQ4560DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4560DQ-LF-Z requirements.

6.How does Aetrix verify that MPQ4560DQ-LF-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4560DQ-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 MPQ4560DQ-LF-Z meets industry standards.

7.What is the process for return or replacement of MPQ4560DQ-LF-Z?

All MPQ4560DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4560DQ-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 MPQ4560DQ-LF-Z part is unused and in its original packaging.

Return procedure for MPQ4560DQ-LF-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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