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

Monolithic Power Systems Inc. MPQ4561DQ-AEC1-LF-P

Name: MPQ4561DQ-AEC1-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4561DQ-AEC1-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4561DQ-AEC1-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: MPQ4561DQ-AEC1-LF-P.pdf

Description:: IC REG BUCK ADJ 1.5A 10QFN

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Product details

Overview

MPQ4561DQ-AEC1-LF-P 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 current across a 3.8V–55V input range and adjustable 0.8V–52V output. It operates at up to 2MHz switching frequency, features 140μA quiescent current, and supports external soft-start and frequency programming-designed for automotive power rails such as infotainment head units and ADAS camera modules.

For engineers reviewing the MPQ4561DQ-AEC1-LF-P datasheet, MPQ4561DQ-AEC1-LF-P pinout, MPQ4561DQ-AEC1-LF-P application, or MPQ4561DQ-AEC1-LF-P equivalent, key selection criteria include its AEC-Q100 qualification, 12µA shutdown current, thermal shutdown with 20°C hysteresis, programmable frequency via FREQ pin resistor, and compatibility with ceramic output capacitors without requiring external compensation components beyond standard R-C networks.

Technical Context

The MPQ4561DQ-AEC1-LF-P implements peak current-mode control with internal transconductance error amplifier (G_CS = 4.5 A/V) and fixed-frequency PWM operation above light load, transitioning to pulse-skipping mode below ~200mA to maintain >85% efficiency down to 10μA load. Its bootstrap driver charges via VIN–SW path with dedicated UVLO (2.5V rising threshold) and internal 5V regulation.

It integrates a precision 0.795V feedback reference (±3.3% over –40°C to +125°C), 100ns minimum on-time, and cycle-by-cycle current limiting with 2.5A typical current limit (–40°C to +125°C). Startup sequencing includes 50μs blanking, internal reference stabilization, and soft-start ramp controlled by external capacitor on SS pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.8V to 55V - supports 12V/24V/48V automotive battery systems including cold-crank (down to 3.8V) and load-dump transients.
Output Current	Up to 1.5A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in distributed ECUs.
Switching Frequency	Programmable up to 2MHz - enables compact magnetics and avoids AM band EMI (530–1710 kHz) without shielding.
Quiescent Current	140μA at no load - extends battery life in always-on vehicle modules like telematics and door controllers.
Feedback Reference	0.795V ±3.3% - sets output voltage accuracy; used with external resistor divider to achieve stable 0.8V–52V regulation.
Internal MOSFET R_DS(on)	300mΩ max - reduces conduction loss at 1.5A, enabling >90% efficiency at 12V→3.3V conversion.
Shutdown Current	12μA typical - ensures ultra-low leakage during vehicle sleep mode (e.g., ISO 8859-3 Class 3).
Thermal Protection	150°C trip with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design.

Pinout & Package

MPQ4561DQ-AEC1-LF-P is housed in a thermally enhanced 3mm × 3mm QFN-10 package with exposed thermal pad, optimized for automotive PCB layouts requiring high power density and low thermal resistance (θ_JA = 50°C/W on 4-layer JEDEC board).

Pin/Terminal	Circuit Role	Design Meaning
1,2 SW	Switch Node	Drives external Schottky diode; requires low-inductance layout to minimize ringing and EMI.
3 EN	Enable Input	Logic-level control (1.55V threshold); internal 1µA pull-up allows floating-enable configuration.
4 COMP	Compensation Output	Error amplifier output; connects to RC network for loop stability tuning and transient response shaping.
5 FB	Feedback Input	Senses output voltage via resistive divider; referenced to 0.795V internal bandgap.
6 GND / Exposed Pad	Power & Signal Ground	Primary thermal path; must be soldered to solid internal ground plane for θ_JC = 12°C/W performance.
7 FREQ	Frequency Programming	Resistor-to-ground sets oscillator frequency (e.g., 95kΩ → 1MHz); enables EMI optimization.
8 SS	Soft-Start Control	Capacitor-to-ground sets startup ramp time (e.g., 10nF → 1.6ms); prevents output overshoot and inrush stress.
9 VIN	Main Power Input	Supplies control circuitry and high-side gate driver; requires local 10µF ceramic decoupling.
10 BST	Bootstrap Supply	Charges external 0.1µF capacitor between BST–SW; enables high-side MOSFET drive above VIN rail.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 Qualification	Validated for –40°C to +125°C junction operation - meets automotive reliability requirements for engine bay and cabin modules.
External Frequency Programming	FREQ pin accepts resistor (e.g., 95kΩ) to set 0.7–1.3MHz range - balances efficiency, size, and EMI compliance.
Stable with Ceramic Output Capacitors	No ESR dependency - eliminates need for tantalum or polymer caps, reducing BOM cost and improving long-term reliability.
12µA Shutdown Supply Current	Enables <100μA system sleep current when paired with low-I_Q LDOs - critical for EU WLTP and EPA GHG compliance.
Integrated Bootstrap Regulator	Self-contained 5V charge pump - removes need for external bootstrap diode and simplifies layout in space-constrained modules.
Precision Current Limit	2.5A typical cycle-by-cycle limit - provides robust short-circuit protection without external sensing resistors.

Applications

Infotainment Power Rail

ADAS Camera Module

Use Scenario: Powers SoC, display interface, and audio codec in automotive head unit with 12V battery input and 3.3V/1.8V rails.

IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic voltage; handles cold-crank dips and load-dump spikes.

Use Value: 2MHz operation avoids AM radio interference; 140μA I_Q minimizes standby drain during ignition-off.

Use Scenario: Supplies image sensor, ISP, and MIPI transmitter in rear-view or surround-view camera ECU.

IC Role / Device Role / Timing Role: High-efficiency point-of-load converter; regulates 1.2V core and 2.8V analog supplies from 12V.

Use Value: AEC-Q100 qualification ensures operation under vibration and thermal cycling; 100ns min on-time supports wide VIN–VOUT ratios.

Body Control Module (BCM)

Telematics Control Unit (TCU)

Use Scenario: Provides regulated 5V for microcontroller, LIN transceivers, and LED drivers in door module or lighting controller.

IC Role / Device Role / Timing Role: Main power stage converting battery voltage to stable 5V; manages intermittent loads like window motor drivers.

Use Value: 55V absolute max rating withstands 40V load-dump transients; thermal shutdown prevents latch-up during fault conditions.

Use Scenario: Powers cellular modem, GNSS receiver, and secure element in connected vehicle gateway with always-on capability.

IC Role / Device Role / Timing Role: Always-on buck converter with ultra-low shutdown current; enables GPS hot-start and OTA update readiness.

Use Value: 12μA shutdown current meets ISO 16750-2 Class 5 sleep mode requirements; QFN10 footprint saves PCB area.

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-P	Successor device: 2A output, 300kHz–2.2MHz programmable frequency, 25μA I_Q, improved light-load efficiency.	Supports higher current loads (e.g., multi-core MCUs) and tighter EMI margins due to spread-spectrum option.	Select for new designs requiring higher output current or lower standby power; pin-compatible but requires updated compensation.
LM61480QRTWRQ1	Texas Instruments part: 8A output, 2.1MHz max, integrated boot diode, 15μA I_Q, but larger 16-pin WQFN package.	Better suited for high-current ADAS domain controllers; lacks AEC-Q100 Grade 1 temp range (rated –40°C to +150°C).	Choose when >1.5A output or integrated boot diode simplification is required; not drop-in due to different pinout and compensation scheme.

Compared with MPQ4561DQ-AEC1-LF-P, MPQ4572 offers higher current and lower I_Q for next-gen automotive platforms, while LM61480QRTWRQ1 provides greater output capability at the cost of larger footprint and different thermal management-neither is pin- nor register-compatible, requiring full schematic and layout revision.

Availability

MPQ4561DQ-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply amid evolving automotive qualification requirements.

Supply support for MPQ4561DQ-AEC1-LF-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 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-temperature, high-reliability vehicle subsystems where input voltage transients, EMI constraints, and long-term supply continuity are critical.

FAQ

Is MPQ4561DQ-AEC1-LF-P still recommended for new designs?

No. Monolithic Power Systems explicitly states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO MPQ4572" in the datasheet header and typical application section. MPQ4572 is the designated functional successor with higher current rating, lower quiescent current, and extended frequency range-engineers initiating new projects should evaluate MPQ4572 instead.

What is the maximum allowable input voltage for MPQ4561DQ-AEC1-LF-P?

The absolute maximum input voltage (VIN) is +60V, per the Absolute Maximum Ratings table. However, the recommended operating range is 3.8V to 55V. Operation above 55V risks violating safe operating area limits and may trigger overvoltage protection or degrade long-term reliability-even if within absolute max ratings.

Can MPQ4561DQ-AEC1-LF-P operate with only ceramic output capacitors?

Yes. The datasheet explicitly lists "Stable with Ceramic Capacitor" as a feature. Its current-mode architecture and internal compensation allow stable regulation using low-ESR ceramic capacitors alone-no series ESR or polymer/tantalum additions are required, simplifying design and improving lifetime reliability.

How is the soft-start time calculated for MPQ4561DQ-AEC1-LF-P?

Soft-start time (t_SS) is approximated as t_SS = (0.8V × C_SS) / 5μA, where C_SS is the capacitor value connected between SS pin and GND. For example, a 10nF capacitor yields ~1.6ms ramp time. This linear ramp controls FB regulation target to prevent output overshoot during startup or fault recovery.

Does MPQ4561DQ-AEC1-LF-P include integrated bootstrap diode functionality?

No. MPQ4561DQ-AEC1-LF-P requires an external bootstrap capacitor (0.1µF ceramic) between BST and SW pins but does not integrate a bootstrap diode. The internal bootstrap regulator uses a PMOS pass transistor charged from VIN during SW low periods-external Schottky diode is unnecessary, unlike older buck controllers.

What is the thermal shutdown behavior of MPQ4561DQ-AEC1-LF-P?

Thermal shutdown activates at +150°C junction temperature and releases at +130°C (20°C hysteresis). When triggered, the high-side MOSFET turns off immediately, COMP is pulled low, and internal regulators shut down-preventing thermal runaway. Recovery is automatic once die temperature falls below the hysteresis threshold.

Is the MPQ4561DQ-AEC1-LF-P RoHS compliant and lead-free?

Yes. Per the datasheet: "All MPS parts are lead-free and adhere to the RoHS directive." The "-LF" suffix in the part number explicitly denotes lead-free, RoHS-compliant packaging. MPS confirms green status on its Quality Assurance webpage, with full material declarations available upon request.

MPQ4561DQ-AEC1-LF-P 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-P FAQ

1.How can I place an order for MPQ4561DQ-AEC1-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-P reliable?

The price and inventory of MPQ4561DQ-AEC1-LF-P 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-P is usually 5 days.

3.What payment methods are accepted for MPQ4561DQ-AEC1-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4561DQ-AEC1-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4561DQ-AEC1-LF-P?

MPQ4561DQ-AEC1-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-P?

For technical support, including MPQ4561DQ-AEC1-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4561DQ-AEC1-LF-P requirements.

6.How does Aetrix verify that MPQ4561DQ-AEC1-LF-P is sourced from the original manufacturer or authorized distributors?

All MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-P meets industry standards.

7.What is the process for return or replacement of MPQ4561DQ-AEC1-LF-P?

All MPQ4561DQ-AEC1-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4561DQ-AEC1-LF-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 MPQ4561DQ-AEC1-LF-P part is unused and in its original packaging.

Return procedure for MPQ4561DQ-AEC1-LF-P:

1.Submit a request within 90 days.

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

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