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

Monolithic Power Systems Inc. MPQ4462DQ-LF-P

Name: MPQ4462DQ-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4462DQ-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4462DQ-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-VFDFN Exposed Pad

Datasheet:: MPQ4462DQ-LF-P.pdf

Description:: IC REG BUCK ADJ 3.5A 10QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ4462DQ-LF-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, asynchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, delivering up to 3.5A output current across a 3.8V–36V input range, programmable switching frequency up to 4MHz, and 120µA quiescent current-designed for automotive infotainment power rails.

For engineers reviewing the MPQ4462DQ-LF-P datasheet, MPQ4462DQ-LF-P pinout, MPQ4462DQ-LF-P application, or MPQ4462DQ-LF-P equivalent, key selection criteria include its AEC-Q100 qualification, QFN10 (3mm×3mm) package thermal performance, 0.8V–30V adjustable output, internal soft-start, and frequency foldback for reliable startup in automotive 12V/24V systems.

Technical Context

The MPQ4462DQ-LF-P implements current-mode control with cycle-by-cycle peak-current limiting and internal error amplifier (200V/V gain, 60µA/V transconductance), enabling fast transient response and stable regulation without external current-sense resistors. Its programmable oscillator uses an external resistor (e.g., 18kΩ for 4MHz) and includes frequency foldback during startup to prevent inductor-current runaway.

It integrates a 2.6V internal regulator powered directly from VIN, supports bootstrap charging via BST–SW capacitor, and features precise enable thresholds (1.5V rising / 1.2V falling) with internal pull-up, UVLO (3.0V rising / 2.6V hysteresis), and thermal shutdown (150°C trip / 135°C hysteresis) for fault-tolerant operation in harsh environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.8V to 36V - supports direct connection to automotive battery (cold-crank down to ~4V, load-dump up to 36V)
Output Current	3.5A continuous - sufficient for powering ADAS camera modules or domain controllers
Switching Frequency	Programmable up to 4MHz - enables compact magnetics and EMI filtering for AM-band-sensitive applications
Quiescent Current	120µA - extends battery runtime in always-on vehicle subsystems (e.g., telematics wake-up circuits)
Feedback Reference	0.792V typical (±1.5% over temp) - sets output accuracy for 1.8V, 3.3V, or 5V rails using standard resistor dividers
High-Side R_DS(on)	150mΩ - reduces conduction loss at 3.5A, enabling >90% efficiency at 12V→5V/2A
Thermal Shutdown	150°C with 15°C hysteresis - protects against sustained overload or poor PCB heatsinking in enclosed ECUs

Pinout & Package

MPQ4462DQ-LF-P is housed in a thermally enhanced 3mm×3mm QFN-10 package with exposed ground pad, optimized for automotive PCB layouts requiring low θ_JA (50°C/W) and high power density.

Pin/Terminal	Circuit Role	Design Meaning
1, 2 (SW)	Switch Node	Drives external Schottky catch diode; requires short, low-inductance routing to minimize voltage spikes and EMI
3 (EN)	Enable Control	Logic-compatible input with 1.5V rising threshold; internal 1µA pull-up allows floating-enable operation
4 (COMP)	Error Amplifier Output	Drives external RC compensation network; clamped between 0.9V–2.0V for stability and transient response tuning
5 (FB)	Feedback Input	Senses output voltage divider; referenced to 0.792V internal bandgap for ±1.5% output accuracy
6 (GND)	Power Ground	Common return for control circuitry; must be connected to exposed pad for thermal and noise integrity
7 (FREQ)	Frequency Set	Accepts resistor-to-ground (e.g., 18kΩ → 4MHz); enables EMI optimization without changing layout
8, 9 (VIN)	Input Supply	Supplies all internal circuitry; requires local 10µF ceramic decoupling close to pins 8/9
10 (BST)	Bootstrap Supply	Charges high-side gate driver via external 0.1µF capacitor to SW; critical for MOSFET turn-on above 5V V_GS
Exposed Pad	Thermal & Electrical Ground	Mandatory solder connection to internal GND plane with ≥9 thermal vias (15mil, 40mil pitch) for θ_JC = 12°C/W

Key Features

Feature	Design Value
Internal Soft-Start	1.5ms ramp time prevents output overshoot during cold-start or reset events in automotive ECUs
Stable with Ceramic Output Capacitors	Eliminates need for tantalum or electrolytic caps-reduces BOM count and improves long-term reliability
Internally-Set Current Limit	4.0–5.5A cycle-by-cycle limit removes external sense resistor, saving board space and power loss
AEC-Q100 Grade 1 Qualification	Rated for −40°C to +125°C junction temperature-validates suitability for engine bay and ADAS front-end locations
Frequency Foldback at Light Load	Reduces switching/gate losses below 10% load, maintaining >85% efficiency down to 10mA output

Applications

Automotive Infotainment Power

ADAS Camera Module Supply

Use Scenario: Powers SoC, display interface, and audio codec in head-unit systems with 12V battery input and strict EMI limits near AM radio bands.

IC Role / Device Role / Timing Role: Primary step-down regulator generating 1.8V/3.3V/5V rails; operates at 4MHz to shift switching noise above sensitive AM band (530–1710kHz).

Use Value: Eliminates need for external EMI filters and reduces solution size by 30% vs. 500kHz alternatives while meeting CISPR 25 Class 5 radiated emissions.

Use Scenario: Supplies image sensor and ISP in forward-facing camera modules where ambient temperature exceeds 105°C and supply must survive load dump.

IC Role / Device Role / Timing Role: High-reliability buck converter with AEC-Q100 Grade 1 rating and thermal shutdown hysteresis; regulates 3.3V from 9–16V nominal battery.

Use Value: Maintains regulated output during 300ms load-dump pulses up to 36V and ensures safe shutdown before die temperature exceeds 150°C under sealed housing conditions.

Industrial Telematics Gateway

Commercial Vehicle Telematics Unit

Use Scenario: Powers LTE modem, GNSS receiver, and microcontroller in fleet management gateways operating on 24V truck batteries with wide cold-crank transients.

IC Role / Device Role / Timing Role: Input-range robust buck converter with 3.8V UVLO and 120µA quiescent current; enables >1-year battery backup in sleep mode.

Use Value: Survives 4.5V cold-crank dips without brownout, and draws <15µA in shutdown-extending supercapacitor hold-up time by 2.3× vs. non-AEC parts.

Use Scenario: Delivers 5V/3A to CAN FD controller, cellular module, and secure element in heavy-duty vehicle telematics units exposed to vibration and thermal cycling.

IC Role / Device Role / Timing Role: Automotive-qualified synchronous-capable buck (with external diode) providing stable 5V rail with <1% line/load regulation across −40°C to +105°C.

Use Value: Achieves ±0.5% output accuracy over full temperature range using internal reference, reducing need for post-regulation LDOs and lowering system BOM cost.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4462DN-LF-Z	SOIC-8E package (θ_JA = 50°C/W), same electrical specs, no exposed thermal pad	Better suited for manual assembly or legacy through-hole compatible designs; lower power density than QFN	Select when thermal budget allows >10°C/W higher junction rise or when reflow compatibility with mixed-technology boards is required
LM61480-Q1	4.5V–60V input, 5A output, 2.1MHz fixed freq, integrated boot diode, smaller min ON-time (60ns)	Higher input range and current; lacks programmable frequency and frequency foldback	Prefer for 48V architectures or where fixed-frequency EMI predictability outweighs flexibility of 4MHz scaling

Compared with MPQ4462DQ-LF-P, the SOIC8E variant trades thermal performance for assembly simplicity, while the LM61480-Q1 offers wider VIN and higher current but sacrifices frequency programmability and light-load efficiency optimization-making MPQ4462DQ-LF-P optimal for compact, EMI-sensitive 12V/24V automotive modules.

Availability

MPQ4462DQ-LF-P is available at Aetrix Electronics and suitable for automotive infotainment power, ADAS camera module supply, and industrial telematics gateway applications requiring stable component supply, AEC-Q100 compliance, and high-frequency switching capability.

Supply support for MPQ4462DQ-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 MPQ4462 product line delivers AEC-Q100 qualified, high-frequency buck converters targeting automotive subsystems where small size, low EMI, and extended temperature operation are mandatory-such as infotainment, ADAS, and body electronics.

FAQ

What is the minimum recommended input voltage for reliable startup?

The MPQ4462DQ-LF-P has a VIN UVLO rising threshold of 3.0V with 400mV hysteresis. For guaranteed startup under worst-case conditions-including cold-crank transients and PCB trace drops-the minimum recommended input is 3.8V, matching the specified operating range. Below this, the device remains latched off until VIN exceeds 3.4V.

Can MPQ4462DQ-LF-P operate without an external bootstrap diode?

Yes-MPQ4462DQ-LF-P uses an internal bootstrap regulator that charges the BST capacitor from VIN through a PMOS pass transistor during SW low periods. An external diode is only recommended for VIN ≤5V, high-duty-cycle operation (>65%), or when BST voltage droop is observed at light loads; it is not required for standard 12V/24V automotive use.

How does frequency foldback improve startup behavior?

During startup, frequency foldback reduces the switching frequency to ~200kHz (vs. nominal 4MHz) until output regulation is achieved. This extends the minimum off-time, preventing inductor current runaway and ensuring controlled soft-start even with large output capacitors-critical for avoiding inrush-induced voltage collapse in multi-rail systems.

What is the maximum achievable output voltage accuracy over temperature?

The internal feedback reference is specified as 0.773V to 0.812V (−40°C to +125°C), corresponding to ±2.5% total variation. With precision external resistors (0.5% tolerance, 50ppm/°C), overall output voltage accuracy remains within ±3% across the full AEC-Q100 Grade 1 temperature range.

Is the QFN10 package RoHS-compliant and lead-free?

Yes-MPQ4462DQ-LF-P carries the "-LF" suffix indicating lead-free, RoHS-compliant packaging per EU Directive 2011/65/EU. The package uses matte tin (Sn) plating over copper leadframe and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) for standard SMT reflow processes.

Does MPQ4462DQ-LF-P support forced PWM mode?

No-MPQ4462DQ-LF-P operates exclusively in pulse-skipping mode at light loads to maximize efficiency. It lacks a MODE pin or external control for forced continuous conduction mode (CCM). For applications requiring constant-frequency operation across all loads, consider the MPQ4470 series or LM61480-Q1 instead.

What is the recommended PCB layout practice for the exposed thermal pad?

The exposed pad must be soldered to a solid internal or bottom-layer GND plane using ≥9 thermal vias (15mil barrel diameter, 40mil center-to-center pitch). Vias should be tented on the top side and filled/plated to prevent solder wicking. Minimum copper area is 3mm×3mm; larger polygons improve θ_JA and long-term reliability under thermal cycling.

MPQ4462DQ-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:: 3.5A

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)

MPQ4462DQ-LF-P FAQ

1.How can I place an order for MPQ4462DQ-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4462DQ-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 MPQ4462DQ-LF-P reliable?

The price and inventory of MPQ4462DQ-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 MPQ4462DQ-LF-P is usually 5 days.

3.What payment methods are accepted for MPQ4462DQ-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4462DQ-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4462DQ-LF-P?

MPQ4462DQ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4462DQ-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 MPQ4462DQ-LF-P?

For technical support, including MPQ4462DQ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4462DQ-LF-P requirements.

6.How does Aetrix verify that MPQ4462DQ-LF-P is sourced from the original manufacturer or authorized distributors?

All MPQ4462DQ-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 MPQ4462DQ-LF-P meets industry standards.

7.What is the process for return or replacement of MPQ4462DQ-LF-P?

All MPQ4462DQ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4462DQ-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 MPQ4462DQ-LF-P part is unused and in its original packaging.

Return procedure for MPQ4462DQ-LF-P:

1.Submit a request within 90 days.

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

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