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

Monolithic Power Systems Inc. MPQ3426DL-AEC1-LF-P

Name: MPQ3426DL-AEC1-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ3426DL-AEC1-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ3426DL-AEC1-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 14-VFDFN Exposed Pad

Datasheet:: MPQ3426DL-AEC1-LF-P.pdf

Description:: IC REG BOOST PROG 6A 14QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ3426DL-AEC1-LF-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified current-mode boost converter IC with integrated 6A/45V/90mΩ MOSFET, configurable 300kHz–2MHz switching frequency, 3.2V–22V input bias range, and 35V max output voltage. It delivers fast transient response for automotive pre-boost and cold-crank applications requiring stable high-current step-up regulation under wide VIN variation.

For engineers reviewing the MPQ3426DL-AEC1-LF-P datasheet, MPQ3426DL-AEC1-LF-P pinout, MPQ3426DL-AEC1-LF-P application, or MPQ3426DL-AEC1-LF-P equivalent, key selection criteria include its programmable UVLO hysteresis via EN resistor divider, external compensation for ceramic-capacitor stability, soft-start capacitor control, thermal shutdown at 160°C, and QFN-14 (3mm×4mm) wettable-flank-compatible package.

Technical Context

The MPQ3426DL-AEC1-LF-P implements a constant-frequency peak-current-mode control architecture with internal transconductance error amplifier (160μA/V), 1.225V feedback reference, and 6μA soft-start current source. Its FSET pin sets switching frequency linearly via external resistor (e.g., 84.5kΩ yields 540kHz), while COMP pin supports Type II compensation with user-defined poles and zero.

It integrates protection functions including under-voltage lockout (2.75V–3.15V hysteresis), cycle-by-cycle current limiting (6.2A–8.5A), and thermal shutdown at 160°C. The device operates across –40°C to +125°C junction temperature and supports biased supply down to 3.2V, enabling cold-crank operation in 12V automotive systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Switch Rating	45V drain-source, 6A continuous, 90mΩ R_DS(on) - enables load-dump survival and high-efficiency boost up to 35V
Input Voltage Range	3.2V to 22V biased supply - supports automotive cold-crank (≥3V) and post-ignition operation
Output Voltage Range	3.2V to 35V regulated - set via external FB resistor divider with 1.225V reference
Switching Frequency	300kHz to 2MHz programmable via FSET resistor - allows EMI optimization and compact filter design
Quiescent Current	650–950μA typical - minimizes standby power loss in always-on vehicle subsystems
UVLO Threshold	2.75V to 3.15V with 250mV hysteresis - ensures reliable startup and brownout recovery in noisy battery rails
Thermal Shutdown	160°C junction - protects against sustained overload or poor PCB thermal design
Shutdown Current	<1μA - enables ultra-low-power system sleep modes

Pinout & Package

MPQ3426DL-AEC1-LF-P uses a QFN-14 (3mm × 4mm) package with wettable flanks and exposed thermal pad (EP). Pin 1 identification is marked by a corner chamfer (Option A) per JEDEC MO-229 VEED-5. The exposed pad must be soldered to a solid copper thermal plane for optimal power dissipation (θ_JA = 50°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 COMP	Compensation node	Connects external RC network to stabilize control loop; sets dominant pole/zero for ceramic-output-capacitor compatibility
2 EN	Enable control input	Logic-level on/off control; also programs VIN UVLO hysteresis via external resistor divider
3 VIN	Bias supply input	Accepts 3.2V–22V; powers internal LDO and gate driver; can be decoupled separately from main input
4–6 SW	Power switch drain terminals	Three paralleled pins reduce conduction loss and thermal resistance for 6A peak current
7 VDD	LDO output	5.9V max regulated supply; can be tied to BIAS to extend low-VIN operation and improve efficiency
8–10 PGND	Power ground return	Three dedicated pins minimize ground bounce during high di/dt switching transitions
11 AGND	Analog ground reference	Single-point connection point for feedback and compensation; isolated from PGND except at EP
12 SS	Soft-start timing	6μA constant-current charge of external capacitor controls startup ramp rate and limits inrush current
13 FB	Feedback input	1.225V precision reference; connects to resistor divider to set output voltage with ±1% tolerance
14 FSET	Frequency programming	0.5V-regulated node; current sink sets f_SW linearly (e.g., 84.5kΩ → 540kHz)
15 EP	Exposed thermal pad	Must be soldered to PCB thermal plane; serves as primary PGND path and heat sink (θ_JC = 12°C/W)

Key Features

Feature	Design Value
Automotive qualification	AEC-Q100 Grade 1 (–40°C to +125°C T_J) - validated for engine bay and front-end electronics
Programmable UVLO hysteresis	Configurable via EN resistor divider - prevents oscillation during slow-rising battery voltage (e.g., cold-crank)
External loop compensation	COMP pin supports full Type II design - enables stable regulation with low-ESR ceramic output capacitors (4.7μF–22μF)
Micro-power shutdown	<1μA I_Q - meets ISO 16750-2 quiescent current requirements for parked vehicle mode
Wettable flank package	QFN-14 (3mm×4mm) with solderable side walls - enables automated optical inspection (AOI) of solder joints
Fast transient response	Current-mode control with 100ns minimum ON time - maintains regulation during 10A/μs load steps in audio bias supplies

Applications

Automotive Pre-Boost

Audio Microphone Bias

Use Scenario: Boosting 6–9V battery rail to stable 12V during cold-crank when alternator is offline.

IC Role / Device Role / Timing Role: Primary step-up regulator providing regulated 12V/3A to ADAS camera modules and radar ECUs.

Use Value: Maintains system uptime below 3.2V input with <100μs recovery from 50% load step, preventing sensor dropout.

Use Scenario: Generating clean 24V bias for MEMS microphone arrays in infotainment head units.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR boost converter powering analog front-end amplifiers.

Use Value: Configurable 2MHz f_SW shifts switching noise above audio band (20kHz), eliminating audible artifacts.

OLED Display Bias

SEPIC Automotive Supply

Use Scenario: Providing 35V anode supply for automotive OLED instrument cluster displays.

IC Role / Device Role / Timing Role: High-voltage boost stage delivering 35V/0.5A with tight line/load regulation (±1.5%).

Use Value: Integrated 45V MOSFET eliminates need for external HV transistor, reducing BOM count and layout area.

Use Scenario: Regulating 12V battery to stable 12V output during load dump (up to 45V transient).

IC Role / Device Role / Timing Role: SEPIC topology controller using MPQ3426DL-AEC1-LF-P in non-inverting buck-boost configuration.

Use Value: 45V switch rating withstands ISO 7637-2 Pulse 5a (load dump), avoiding external TVS clamping.

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM5122MQ/NOPB	Higher 65V switch rating; requires external MOSFET; no integrated soft-start capacitor control	Preferred for >45V transients (e.g., commercial truck 24V systems); lacks AEC-Q100 qualification	Select when input transients exceed 45V or when discrete FET selection is required for thermal partitioning
TPS61088RHLR	Lower 22V switch rating; 10A current limit; fixed 500kHz/1MHz f_SW; no UVLO hysteresis programming	Targeted at consumer portable devices; not AEC-Q100 qualified; unsuitable for automotive cold-crank	Choose only for cost-sensitive non-automotive applications where 35V output and AEC-Q100 are not required

Compared with LM5122MQ/NOPB and TPS61088RHLR, MPQ3426DL-AEC1-LF-P uniquely combines AEC-Q100 Grade 1 qualification, 45V integrated switch, programmable UVLO hysteresis, and wettable-flank QFN packaging-making it the only drop-in solution for space-constrained automotive pre-boost designs requiring production-grade reliability.

Availability

MPQ3426DL-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive pre-boost, cold-crank power conditioning, and OLED display bias applications requiring stable component supply across extended temperature and lifecycle demands.

Supply support for MPQ3426DL-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 power management ICs, with core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and computing markets.

The MPQ3426 product line targets AEC-Q100-compliant automotive power conversion, specifically engineered for robustness in cold-crank, load-dump, and wide-input-range environments where reliability and thermal performance are critical.

FAQ

What is the maximum output voltage achievable with MPQ3426DL-AEC1-LF-P?

The MPQ3426DL-AEC1-LF-P supports regulated output voltages up to 35V, set by the external FB resistor divider and referenced to its 1.225V internal feedback threshold. Operation beyond 35V violates absolute maximum ratings and risks damage to the internal 45V MOSFET due to overvoltage stress on the SW node during transients.

Can MPQ3426DL-AEC1-LF-P operate with input voltage below 3.2V?

No. The device has a guaranteed minimum operating VIN bias of 3.2V per datasheet specifications. Below this, internal LDO regulation fails, gate drive collapses, and the IC enters undervoltage lockout. For sub-3.2V cold-crank support, external biasing or a secondary low-VIN booster is required.

How does the FSET pin determine switching frequency?

The FSET pin is a 0.5V-regulated current sink; its output current (I_FSET) flows through an external resistor (R_FSET) to AGND. Switching frequency is calculated as f_SW ≈ 0.86 / R_FSET (with R_FSET in kΩ), yielding 540kHz at 84.5kΩ. This linear relationship enables precise EMI tuning without trimming components.

Why are there three SW pins and three PGND pins?

The three SW pins (pins 4–6) and three PGND pins (pins 8–10) are paralleled to reduce conduction losses and thermal resistance for 6A continuous operation. Each SW pin carries ~2A, lowering effective R_DS(on) and distributing heat across the package, while multiple PGND paths minimize ground loop inductance and voltage spikes during high di/dt switching.

Is the exposed pad (EP) electrically connected to PGND?

Yes. Pin 15 (EP) is internally connected to PGND and serves as the primary thermal and electrical ground path. It must be soldered to a large PCB copper pour tied directly to the PGND net. Failure to do so causes excessive junction temperature rise (>30°C penalty) and potential thermal shutdown under full load.

Does MPQ3426DL-AEC1-LF-P support synchronous rectification?

No. The MPQ3426DL-AEC1-LF-P uses an asynchronous architecture with external Schottky diode rectification. It does not provide a second gate drive signal or internal synchronous MOSFET control. Synchronous operation would require external driver circuitry and careful dead-time management, which is unsupported by this device's topology.

What is the purpose of the AGND pin, and how should it be routed?

AGND (pin 11) is the dedicated analog ground reference for the error amplifier, FB comparator, and compensation network. It must connect to the exposed pad at a single point only-never daisy-chained-to prevent PGND noise from modulating the feedback signal. All FB and COMP components must reference AGND, not PGND or system GND.

MPQ3426DL-AEC1-LF-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 14-VFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Up

Output Configuration:: Positive

Topology:: Boost

Output Type:: Programmable

Number of Outputs:: 1

Voltage - Input (Min):: 3.2V

Voltage - Input (Max):: 22V

Voltage - Output (Min/Fixed):: 3.2V

Voltage - Output (Max):: 35V

Current - Output:: 6A

Frequency - Switching:: 300kHz ~ 2MHz

Synchronous Rectifier:: No

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 14-QFN (3x4)

MPQ3426DL-AEC1-LF-P FAQ

1.How can I place an order for MPQ3426DL-AEC1-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ3426DL-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 MPQ3426DL-AEC1-LF-P reliable?

The price and inventory of MPQ3426DL-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 MPQ3426DL-AEC1-LF-P is usually 5 days.

3.What payment methods are accepted for MPQ3426DL-AEC1-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3426DL-AEC1-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ3426DL-AEC1-LF-P?

MPQ3426DL-AEC1-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ3426DL-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 MPQ3426DL-AEC1-LF-P?

For technical support, including MPQ3426DL-AEC1-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3426DL-AEC1-LF-P requirements.

6.How does Aetrix verify that MPQ3426DL-AEC1-LF-P is sourced from the original manufacturer or authorized distributors?

All MPQ3426DL-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 MPQ3426DL-AEC1-LF-P meets industry standards.

7.What is the process for return or replacement of MPQ3426DL-AEC1-LF-P?

All MPQ3426DL-AEC1-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3426DL-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 MPQ3426DL-AEC1-LF-P part is unused and in its original packaging.

Return procedure for MPQ3426DL-AEC1-LF-P:

1.Submit a request within 90 days.

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

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