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

Monolithic Power Systems Inc. MPQ4462DN-LF-Z

Name: MPQ4462DN-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4462DN-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4462DN-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width) Exposed Pad

Datasheet:: MPQ4462DN-LF-Z.pdf

Description:: IC REG BUCK ADJ 3.5A 8SOICE

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Product details

Overview

MPQ4462DN-LF-Z 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 and supporting programmable switching frequencies up to 4MHz. It features 120µA quiescent current, internal soft-start, and stable operation with ceramic output capacitors - deployed in automotive infotainment power rails and ADAS camera modules.

For engineers reviewing the MPQ4462DN-LF-Z datasheet, MPQ4462DN-LF-Z pinout, MPQ4462DN-LF-Z application, or MPQ4462DN-LF-Z equivalent, key selection criteria include its AEC-Q100 qualification, 4MHz high-frequency capability for EMI-sensitive AM radio systems, 0.8V–30V adjustable output, thermal shutdown at 150°C, and SOIC8E package compatibility with legacy PCB layouts.

Technical Context

The MPQ4462DN-LF-Z implements peak-current-mode control with an internal error amplifier (200V/V gain, 60µA/V transconductance) and a programmable oscillator set via external resistor on the FREQ pin. Its COMP pin delivers voltage-controlled current limiting without external sense resistors, enabling fast transient response and simplified compensation.

It integrates a bootstrap driver with dedicated UVLO (2.2V rising threshold), supports frequency foldback at light loads to reduce gate-driving losses, and uses internal soft-start with a 1.5ms VFB ramp from 0V to 0.8V. The device operates in fixed-frequency PWM mode above light load and enters pulse-skipping mode under no-load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.8V to 36V - supports direct connection to automotive battery (9V–16V nominal) and industrial 24V rails without pre-regulation.
Max Output Current	3.5A - sustained delivery with thermal shutdown protection at 150°C junction temperature.
Switching Frequency	Up to 4MHz - programmable via external resistor; enables compact magnetics and avoids AM band interference (530–1710kHz).
Quiescent Current	120µA - enables >1-year standby runtime in always-on automotive modules powered by 12V battery.
Feedback Reference	0.792V (typ.) - sets output voltage via resistor divider; tolerance ±1.5% ensures <±30mV error at 3.3V output.
Internal MOSFET R_DS(on)	150mΩ - reduces conduction loss at 3.5A, yielding >92% efficiency at 12V→5V/2A operation.
EN Threshold Hysteresis	300mV - prevents chatter during noisy supply ramp-up; rising threshold 1.5V, falling threshold 1.2V.

Pinout & Package

MPQ4462DN-LF-Z is housed in an SOIC8E (Small Outline Integrated Circuit, 8-pin, exposed pad) package measuring 4.9mm × 6.0mm × 1.75mm, with thermal pad connected to GND for enhanced heat dissipation. Pin functions are validated per Monolithic Power Systems Rev. 1.12 datasheet (May 2016).

Pin/Terminal	Circuit Role	Design Meaning
VIN (Pin 7)	Input Supply	Primary power input; requires local 10µF ceramic decoupling to suppress high di/dt spikes.
SW (Pin 1)	Switch Node	Drain of internal high-side MOSFET; connects to Schottky catch diode cathode and inductor.
EN (Pin 2)	Enable Control	Logic-level enable with 1.5V rising threshold; internally pulled up to ~3V when floating.
COMP (Pin 3)	Error Amplifier Output	Current-source output driving RC compensation network; clamped between 0.9V–2.0V during operation.
FB (Pin 4)	Feedback Input	Senses resistor-divider tap; regulates output by comparing to internal 0.792V reference.
GND (Pin 5)	Ground Reference	Power and signal ground; must be tied to thermal pad and low-impedance PCB plane.
FREQ (Pin 6)	Frequency Set	Connects to ground via resistor (e.g., 18kΩ for 4MHz); sets oscillator timing with ±15% tolerance.
BST (Pin 8)	Bootstrap Supply	Charges internal high-side gate driver; requires 0.1µF capacitor between BST and SW pins.

Key Features

Feature	Design Value
Integrated High-Side MOSFET	150mΩ R_DS(on) eliminates external switch and gate driver, reducing BOM count and layout area.
Programmable Switching Frequency	Configurable from 0.2MHz to 4MHz via single resistor - enables EMI optimization and magnetic size reduction.
Stable with Ceramic Output Capacitors	No ESR requirement simplifies filtering design and improves reliability vs. tantalum/electrolytic alternatives.
Internally-Set Current Limit	4.0A–5.5A cycle-by-cycle limit without external sense resistor - lowers cost and board space vs. discrete sensing.
AEC-Q100 Grade 1 Qualification	Rated for −40°C to +125°C ambient operation - validated for automotive powertrain and body electronics.

Applications

Automotive Infotainment

ADAS Camera Module

Use Scenario: Powering 3.3V SoC and display interface in head-unit systems with cold-crank (6V) and load-dump (40V) transients.

IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic voltage; handles wide VIN excursions without external LDO post-regulation.

Use Value: 3.8V–36V input range and 40V absolute max rating withstand automotive transients; 120µA IQ extends battery backup time during ignition-off.

Use Scenario: Generating 1.8V and 2.5V rails for CMOS image sensor and ISP in rear-view and surround-view cameras.

IC Role / Device Role / Timing Role: Point-of-load converter with tight output regulation; synchronized via external clock in multi-rail camera subsystems.

Use Value: 0.8V feedback reference enables precise low-voltage generation; 4MHz operation minimizes inductor size for space-constrained camera housings.

Industrial PLC I/O Module

Battery-Powered Telematics

Use Scenario: Converting 24V field bus to isolated 5V/3.3V for digital I/O conditioning and microcontroller supply in factory automation.

IC Role / Device Role / Timing Role: Non-isolated primary DC/DC stage upstream of isolated DC/DC or signal isolators.

Use Value: 36V max input and SOIC8E package support standard DIN-rail mount PCB layouts; thermal shutdown ensures safe failure mode during overtemperature events.

Use Scenario: Powering LTE modem, GNSS receiver, and MCU in vehicle tracking units powered by 3.7V Li-ion with boost-buck architecture.

IC Role / Device Role / Timing Role: Buck stage in hybrid topology - steps down boosted 12V rail to 3.3V system voltage.

Use Value: 120µA quiescent current enables >30-day deep-sleep battery life; frequency foldback maintains >85% efficiency at 10mA load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4462DQ-AEC1-LF-Z	Same silicon, QFN10 (3×3mm) package with exposed thermal pad - 12°C/W lower θ_JA than SOIC8E.	Better thermal performance in high-power-density designs; requires re-layout for smaller footprint and different pinout.	Select for new designs prioritizing thermal margin and board space; not drop-in compatible with SOIC8E footprints.
LM61480-Q1	TI part with 50mΩ MOSFET, 2.2MHz max frequency, and spread-spectrum EMI reduction - no frequency foldback.	Lacks light-load frequency scaling; higher IQ (15µA typical) but includes PMBus interface for telemetry.	Choose when digital monitoring or tighter EMI compliance (CISPR 25 Class 5) is required over ultra-low IQ.

Compared with MPQ4462DN-LF-Z, the QFN variant offers superior thermal resistance for continuous 3.5A operation, while the LM61480-Q1 trades off quiescent current and frequency agility for telemetry and EMI features - making MPQ4462DN-LF-Z optimal for cost-sensitive, high-efficiency automotive buck applications where analog simplicity and AEC-Q100 Grade 1 are mandatory.

Availability

MPQ4462DN-LF-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial PLC I/O modules requiring stable component supply with AEC-Q100 qualification and long-term production continuity.

Supply support for MPQ4462DN-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 MPQ4462 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh-environment applications demanding AEC-Q100 qualification, wide input range, and high-frequency operation in space-constrained automotive ECUs.

FAQ

What is the maximum recommended input voltage for reliable operation?

The MPQ4462DN-LF-Z has an absolute maximum VIN rating of +40V, but its recommended operating range is 3.8V to 36V. Sustained operation above 36V risks exceeding internal regulator limits and may trigger thermal shutdown. For automotive load-dump scenarios (up to 40V), ensure external clamping or TVS protection is implemented per ISO 7637-2 Pulse 5a requirements.

Does MPQ4462DN-LF-Z require an external bootstrap diode?

An external bootstrap diode is not required under typical conditions but is recommended for VIN ≤5V, high-duty-cycle operation (VOUT/VIN >65%), or when operating above 2MHz. At 4MHz, the internal bootstrap charging window shortens; adding a BAT54 or IN4148 diode from VIN to BST improves gate drive reliability and prevents low-VGS faults.

How is output voltage adjusted, and what is the minimum achievable value?

Output voltage is set using a resistor divider from VOUT to GND, connected to the FB pin. With a 0.792V internal reference, the minimum regulated output is 0.8V (when R2 = 0Ω). Practical minimum is constrained by resistor tolerance and noise; 0.8V is achievable with 1% resistors and proper layout. For 1.8V output, use R2 = 40.2kΩ and R1 = 127kΩ.

What thermal considerations apply to the SOIC8E package in continuous 3.5A operation?

In SOIC8E, θ_JA is 50°C/W on a 4-layer PCB. At 3.5A output into 5V, power dissipation is ~0.7W (assuming 92% efficiency), resulting in ~35°C rise above ambient. To maintain T_J ≤125°C, ambient must stay ≤90°C. Use the exposed pad, ≥6 thermal vias (15mil diameter, 40mil pitch), and 1in² copper pour to achieve this reliably.

Can MPQ4462DN-LF-Z operate in forced PWM mode, or does it default to pulse-skipping?

The MPQ4462DN-LF-Z defaults to pulse-skipping mode at light loads to maintain high efficiency, with automatic transition to fixed-frequency PWM above ~200mA. Forced PWM is not supported - there is no pin or register to disable pulse-skipping. For constant-frequency operation across full load range, consider the MPQ4470 series, which offers SYNC input for external clock forcing.

Is the EN pin compatible with open-drain microcontroller GPIOs?

Yes - the EN pin has an internal 1µA pull-up current source, so it remains enabled when left floating or driven high-impedance. An open-drain GPIO pulling EN to GND (sinking ≥1µA) will reliably disable the device. No external pull-down resistor is needed, simplifying interface with most automotive MCUs.

What is the minimum ON-time specification, and how does it affect high-frequency operation?

The minimum ON-time is 80ns (typ.), limiting practical duty cycle at high frequencies. At 4MHz (250ns period), the maximum achievable duty cycle is 32% - meaning VOUT/VIN ≤0.32. For 5V output, VIN must exceed 15.6V. Below this ratio, pulse skipping dominates. This constraint is documented in the "High-Frequency Operation" section of the datasheet.

MPQ4462DN-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):: 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:: 8-SOICE

MPQ4462DN-LF-Z FAQ

1.How can I place an order for MPQ4462DN-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4462DN-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 MPQ4462DN-LF-Z reliable?

The price and inventory of MPQ4462DN-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 MPQ4462DN-LF-Z is usually 5 days.

3.What payment methods are accepted for MPQ4462DN-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4462DN-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4462DN-LF-Z?

MPQ4462DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4462DN-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 MPQ4462DN-LF-Z?

For technical support, including MPQ4462DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4462DN-LF-Z requirements.

6.How does Aetrix verify that MPQ4462DN-LF-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4462DN-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 MPQ4462DN-LF-Z meets industry standards.

7.What is the process for return or replacement of MPQ4462DN-LF-Z?

All MPQ4462DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4462DN-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 MPQ4462DN-LF-Z part is unused and in its original packaging.

Return procedure for MPQ4462DN-LF-Z:

1.Submit a request within 90 days.

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

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