Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Monolithic Power Systems Inc. MPQ4460DQ-LF-P

Name: MPQ4460DQ-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4460DQ-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPQ4460DQ-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: MPQ4460DQ-LF-P.pdf

Description:: IC REG BUCK ADJ 2.5A 10QFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,004

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MPQ4460DQ-LF-P from Monolithic Power Systems is an industrial-grade, non-synchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, delivering up to 2.5A output current across a 3.8V–36V input range, programmable 4MHz switching frequency, and 0.8V–30V adjustable output voltage. It targets high-voltage power conversion in automotive and industrial systems where compact size and EMI mitigation are critical.

For engineers reviewing the MPQ4460DQ-LF-P datasheet, MPQ4460DQ-LF-P pinout, MPQ4460DQ-LF-P application, or MPQ4460DQ-LF-P equivalent, key selection considerations include its 120µA quiescent current for battery operation, internal soft-start and thermal shutdown, frequency foldback for startup safety, and QFN10 (3mm × 3mm) package compatibility with high-density PCB layouts.

Technical Context

The MPQ4460DQ-LF-P implements peak current-mode control with an internal error amplifier (200V/V gain, 60µA/V transconductance), enabling fast transient response and stable loop compensation using external RC networks on the COMP pin. Its oscillator frequency is resistor-programmable via the FREQ pin (e.g., 45kΩ sets 2MHz; 18kΩ sets 4MHz).

It features a dedicated bootstrap driver (BST pin) with internal 5V regulation, UVLO thresholds at 3.0V (rising) and 2.6V (falling), and precision enable logic (1.5V rising threshold, 300mV hysteresis). Thermal shutdown activates at 150°C with 15°C hysteresis, and internal current limiting operates without external sense resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.8V to 36V - supports direct connection to automotive batteries (12V/24V) and industrial rails without pre-regulation.
Output Current	2.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in distributed power systems.
Switching Frequency	Up to 4MHz - enables use of small inductors (e.g., 2.2µH) and avoids AM radio/ADSL interference bands.
Feedback Reference	0.8V ±2.5% - allows precise output regulation from 0.8V to 30V using standard resistor dividers.
Quiescent Current	120µA - extends battery life in always-on or low-power wake-up applications.
Internal MOSFET R_DS(on)	150mΩ - reduces conduction loss and simplifies layout by eliminating external high-side switch.
Operating Temperature	–40°C to +125°C - meets industrial grade requirements for under-hood and factory-floor environments.

Pinout & Package

MPQ4460DQ-LF-P is housed in a thermally enhanced 3mm × 3mm QFN-10 package with exposed thermal pad on the underside for efficient heat dissipation in compact industrial and automotive PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 SW	Switch Node	Drives external Schottky diode; requires low-inductance routing to minimize voltage spikes during switching transitions.
3 EN	Enable Input	Positive-logic control: >1.5V enables regulator; <1.2V disables with 12µA shutdown current.
4 COMP	Compensation Node	Error amplifier output; connects to external RC network to stabilize control loop and optimize transient response.
5 FB	Feedback Input	Senses scaled output voltage; internal 0.8V reference sets output via resistor divider (e.g., 40.2kΩ + 127kΩ for 3.3V).
6 GND	Power Ground	Main return path for high-current switch node; must be tied directly to output capacitor ground plane.
7 FREQ	Frequency Programming	Resistor-to-ground sets switching frequency (e.g., 18kΩ = 4MHz); enables EMI tuning without changing layout.
8, 9 VIN	Input Supply	Primary power input (3.8–36V); requires local 10µF ceramic decoupling close to pins to suppress switching noise.
10 BST	Bootstrap Supply	Charges external BST capacitor (typically 0.1µF) from VIN to SW; powers floating gate driver for high-side MOSFET.

Key Features

Feature	Design Value
Internal Soft-Start	0.4–1.5ms ramp time prevents output overshoot during power-up, eliminating need for external timing components.
Frequency Foldback	Reduces switching frequency at light load to maintain high efficiency (>85% at 10mA) and avoid inductor current runaway.
Ceramic Capacitor Stability	Stable with low-ESR ceramic output capacitors (e.g., 22µF X5R), reducing BOM count and board area vs. tantalum alternatives.
Integrated Current Limit	2.7–4.5A cycle-by-cycle limit set internally - no external sense resistor required, improving accuracy and thermal performance.
Thermal Shutdown Protection	150°C activation with 15°C hysteresis ensures fault-tolerant operation in sealed enclosures or high-ambient conditions.

Applications

Automotive Infotainment Power

Industrial PLC I/O Module

Use Scenario: Powering 3.3V/5V rails for display controllers, audio codecs, and CAN transceivers in head units.

IC Role / Device Role / Timing Role: Primary step-down regulator converting 12V/24V battery to stable low-voltage logic supply.

Use Value: 4MHz operation avoids AM band interference; 120µA IQ enables low-power sleep mode compliance per ISO 16750-2.

Use Scenario: Generating 5V/12V supplies for digital I/O isolation, analog sensor front-ends, and communication interfaces in modular PLCs.

IC Role / Device Role / Timing Role: High-input-voltage buck converter supporting wide-range industrial AC/DC adapter outputs (e.g., 24V–36V).

Use Value: –40°C to +125°C rating ensures reliability in uncontrolled cabinet environments; QFN10 footprint saves space on dense backplane boards.

Battery-Powered Test Equipment

Distributed Telecom Power

Use Scenario: Portable multimeters, oscilloscope probes, and handheld analyzers requiring long runtime from Li-ion or alkaline cells.

IC Role / Device Role / Timing Role: Efficient step-down stage stepping down 9V–36V battery packs to 3.3V microcontroller core voltage.

Use Value: 120µA quiescent current extends shelf life and standby duration; internal current limit protects against shorted sensor inputs.

Use Scenario: Point-of-load conversion in remote radio units (RRUs) and base station fan trays powered from 48V intermediate bus.

IC Role / Device Role / Timing Role: Compact 4MHz buck regulator generating 5V/12V for FPGA configuration, clock buffers, and monitoring ICs.

Use Value: Small 3mm × 3mm QFN10 package enables high-power density; 36V max input accommodates telecom surge transients (IEC 61000-4-5).

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4460DQ-AEC1-Z	Automotive-grade variant with AEC-Q100 qualification and extended temperature testing (–40°C to +150°C junction).	Required for under-hood automotive modules; not necessary for industrial ambient applications.	Select only if AEC-Q100 compliance is mandated; otherwise, MPQ4460DQ-LF-P offers identical electrical specs at lower cost.
LM61480RQR	4.5V–36V input, 3.5A output, 2.1MHz fixed frequency, higher IQ (26µA typical), no frequency programming pin.	Lacks programmable fSW and has lower max output current; better suited for cost-sensitive, non-EMI-critical designs.	Choose LM61480RQR when fixed-frequency simplicity and lower BOM count outweigh need for 4MHz EMI control or 2.5A+ current headroom.

Compared with MPQ4460DQ-LF-P, the AEC-Q100 variant adds qualification overhead without electrical benefit for industrial use, while the LM61480RQR trades frequency flexibility and current capability for integration simplicity and marginally lower quiescent current.

Availability

MPQ4460DQ-LF-P is available at Aetrix Electronics and suitable for automotive infotainment power, industrial PLC I/O modules, and battery-powered test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for MPQ4460DQ-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 MPQ4460 belongs to MPS's industrial-grade DC/DC converter product line, engineered for robust operation in harsh environments-emphasizing wide input range, high switching frequency, and integrated protection features for automotive and factory automation applications.

FAQ

What is the minimum recommended input voltage for reliable startup?

The MPQ4460DQ-LF-P requires VIN ≥ 3.8V to exit UVLO and initiate regulation. Its UVLO rising threshold is 3.0V, but stable operation-including gate drive and internal regulator function-begins reliably above 3.8V per datasheet specifications and typical performance curves.

Can the MPQ4460DQ-LF-P operate without an external bootstrap capacitor?

No. The BST pin requires a 0.1µF ceramic capacitor connected between BST and SW to sustain the floating gate driver voltage. Omitting it prevents high-side MOSFET turn-on, causing complete regulator failure and potential damage due to uncontrolled SW node behavior.

How does frequency foldback improve light-load efficiency?

At light loads, the MPQ4460DQ-LF-P automatically reduces switching frequency to lower gate-driving and switching losses. This dynamic scaling maintains >85% efficiency down to 10mA load-critical for battery-powered systems where fixed-frequency converters would waste energy through unnecessary switching events.

Is the FB pin internally biased, and what is its input current specification?

Yes-the FB pin has an internal 0.8V reference and draws only 0.02–2.0µA bias current. This ultra-low input current enables use of high-value feedback resistors (e.g., 40.2kΩ + 127kΩ), minimizing divider power loss without compromising regulation accuracy.

What thermal derating applies when using the QFN10 package without PCB copper pour?

With no thermal pad soldered or minimal copper area, θ_JA rises significantly beyond the rated 50°C/W. Derate output current by ~30% at +85°C ambient; full 2.5A output requires the exposed pad fully soldered to ≥1in² of 2oz copper with 4+ thermal vias to internal ground planes.

Does the COMP pin require external components for basic operation?

Yes-COMP is the error amplifier output and must be connected to an external RC compensation network (e.g., 105kΩ + 100pF for 1.8V output) to ensure loop stability. Operating without compensation causes oscillation, poor transient response, and potential output overvoltage during load steps.

What is the maximum allowable voltage on the BST pin relative to SW?

The absolute maximum BST-to-SW voltage is +6V. Exceeding this risks permanent damage to the bootstrap driver. Typical operation maintains ~5V across BST–SW; ensure the external BST capacitor voltage rating exceeds 6.3V and placement minimizes trace inductance.

MPQ4460DQ-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):: 36V

Voltage - Output (Min/Fixed):: 0.8V

Voltage - Output (Max):: 30V

Current - Output:: 2.5A

Frequency - Switching:: Up to 4MHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-QFN (3x3)

MPQ4460DQ-LF-P FAQ

1.How can I place an order for MPQ4460DQ-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4460DQ-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 MPQ4460DQ-LF-P reliable?

The price and inventory of MPQ4460DQ-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 MPQ4460DQ-LF-P is usually 5 days.

3.What payment methods are accepted for MPQ4460DQ-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4460DQ-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4460DQ-LF-P?

MPQ4460DQ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4460DQ-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 MPQ4460DQ-LF-P?

For technical support, including MPQ4460DQ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4460DQ-LF-P requirements.

6.How does Aetrix verify that MPQ4460DQ-LF-P is sourced from the original manufacturer or authorized distributors?

All MPQ4460DQ-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 MPQ4460DQ-LF-P meets industry standards.

7.What is the process for return or replacement of MPQ4460DQ-LF-P?

All MPQ4460DQ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4460DQ-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 MPQ4460DQ-LF-P part is unused and in its original packaging.

Return procedure for MPQ4460DQ-LF-P:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…