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

Monolithic Power Systems Inc. MPQ3425DL-AEC1-LF-P

Name: MPQ3425DL-AEC1-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ3425DL-AEC1-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ3425DL-AEC1-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 14-VFDFN Exposed Pad

Datasheet:: MPQ3425DL-AEC1-LF-P.pdf

Description:: IC REG BOOST ADJ 3A 14QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ3425DL-AEC1-LF-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, current-mode boost converter IC with integrated 3.5A/90mΩ MOSFET, supporting 3.1V–22V BIAS and 3V–50V input, delivering up to 55V output at 3A continuous load in automotive pre-boost and microphone bias supply applications.

For engineers reviewing the MPQ3425DL-AEC1-LF-P datasheet, MPQ3425DL-AEC1-LF-P pinout, MPQ3425DL-AEC1-LF-P application, or MPQ3425DL-AEC1-LF-P equivalent, key selection criteria include programmable 300kHz–1MHz switching frequency, 1.225V feedback reference with ±1.5% tolerance over temperature, 5μA soft-start current, 160°C thermal shutdown, and QFN-14 (3mm×4mm) package with exposed thermal pad.

Technical Context

The MPQ3425 employs constant-frequency peak current-mode control with internal transconductance error amplifier (160μA/V G_EA, 300 V/V A_VEA) and programmable oscillator referenced to FSET pin voltage (0.5V regulated). Its architecture includes right-half-plane zero compensation support via external COMP network and supports both boost and SEPIC topologies.

Operation relies on real-time sensing of switch-node current through internal R_DS(ON) (90mΩ), comparing it against COMP voltage to terminate each on-cycle. UVLO hysteresis is set by external EN resistor divider with 4μA current sink, and loop stability is enabled via dual-pole, single-zero compensation using R_COMP/C_COMP network.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3V to 50V - supports wide automotive battery range including cold-crank (≥3V) and load-dump transient resilience.
Output Voltage Range	Up to 55V - enables high-side bias for RF tuners, CCD sensors, and industrial analog front-ends.
Switching Frequency	300kHz to 1MHz - selectable via FSET resistor; higher f_SW reduces inductor size but increases switching loss.
Feedback Reference	1.225V ±1.5% (–40°C to +125°C) - sets output accuracy; used with external resistor divider for precise V_OUT programming.
Current Limit	3.5A typical (–40°C to +125°C) - protects internal MOSFET during overload; clamps peak inductor current to prevent saturation.
Quiescent Current	650–950μA - ensures low standby power in always-on automotive modules such as infotainment wake-up circuits.
Thermal Shutdown	160°C - OTP protection with hysteresis prevents permanent junction damage under sustained overload or poor PCB thermal design.
Soft-Start Current	5μA - charges external SS capacitor linearly; enables controlled inrush limiting without external circuitry.

Pinout & Package

MPQ3425DL-AEC1-LF-P is housed in a thermally enhanced QFN-14 (3mm × 4mm) package with exposed pad soldered to PCB ground plane for optimal thermal resistance (θ_JC = 12°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 COMP	Error amplifier output	Connects to external R/C compensation network; sets loop bandwidth, phase margin, and transient response.
2 EN	Enable control input	Logic-level on/off control; also programs UVLO threshold and hysteresis via external resistor divider.
3 BIAS	LDO supply input	Accepts 3.1V–22V bias rail; powers internal gate driver and logic; requires local 10nF bypass.
4,5,6 SW	Power switch node	Drain terminals of internal 3.5A/90mΩ MOSFET; connects to inductor and rectifier diode; high dv/dt node.
7 VDD	Gate driver LDO output	Provides regulated ~6V supply to internal high-side driver; decoupled with 0.1μF ceramic capacitor.
8,9,10,EP	Power ground	PGND pins and exposed pad form low-inductance return path for high-current switching loop; must be solidly connected to thermal plane.
11 AGND	Analog ground reference	Separate ground for FB, COMP, SS, FSET; routed to PGND only at single point near exposed pad to avoid noise coupling.
12 SS	Soft-start timing	5μA current source charges external capacitor; controls ramp rate of COMP voltage and output voltage rise time.
13 FB	Feedback input	Monitors output via resistor divider; compares to 1.225V reference to regulate V_OUT; high-impedance input (±200nA bias).
14 FSET	Frequency programming	0.5V-regulated pin; sinking current sets f_SW linearly (e.g., 84.5kΩ → 550kHz); enables EMI optimization.

Key Features

Feature	Design Value
Integrated 3.5A/90mΩ MOSFET	Eliminates external high-side switch; reduces BOM count and layout area while maintaining >90% efficiency at 1A load.
Programmable 300kHz–1MHz f_SW	Enables trade-off between magnetic size (smaller inductors at 1MHz) and conduction vs. switching loss balance.
AEC-Q100 Grade 1 qualification	Validated for –40°C to +125°C operation with full parametric testing; meets automotive reliability and stress requirements.
External compensation (COMP pin)	Supports custom loop shaping for diverse output capacitors (ceramic/tantalum) and load dynamics without redesign.
Micropower shutdown (<1μA)	Enables ultra-low-power sleep mode in telematics and ADAS modules where system-level power budget is critical.
Configurable UVLO and hysteresis	Allows tailored start-up behavior across varying battery conditions using single EN resistor network - no extra components.

Applications

Automotive Pre-Boost Supply

RF Tuner & Microphone Bias

Use Scenario: Generating stable 12V–48V rail from 5V–12V vehicle bus for camera ISP power or radar MMIC bias.

IC Role / Device Role / Timing Role: Primary DC-DC boost regulator with fast transient response to handle pulsed radar loads.

Use Value: Eliminates need for discrete MOSFET + controller; achieves <100μs recovery from 50% load step per typical characterization data.

Use Scenario: Providing clean, low-noise 15V–24V bias to automotive AM/FM tuners and MEMS microphones.

IC Role / Device Role / Timing Role: High-PSRR, low-ripple boost stage operating at 600kHz to avoid AM band interference.

Use Value: Programmable f_SW and soft-start suppress startup glitches that cause audio pop/click in cabin audio systems.

SEPIC Converter Core

Industrial Sensor Excitation

Use Scenario: Implementing non-inverting buck-boost topology for 5V-to-12V conversion in CAN node power supplies where input may dip below output.

IC Role / Device Role / Timing Role: Controller with current-mode regulation enabling stable operation across wide duty cycle range (up to ~90%).

Use Value: Internal MOSFET and current-sense amplifier simplify SEPIC implementation versus dual-MOSFET controllers.

Use Scenario: Delivering precise 24V/30V excitation to strain gauges, RTDs, or piezoelectric sensors in engine control units.

IC Role / Device Role / Timing Role: Precision voltage source with 1.225V reference and <±1.5% FB tolerance over temperature.

Use Value: Tight output regulation ensures measurement accuracy unaffected by battery voltage sag or thermal drift.

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 max V_IN, external MOSFET required, no integrated BIAS LDO, wider f_SW range (50kHz–2MHz)	Suitable for industrial 48V systems; lacks AEC-Q100 qualification and automotive temp grade	Select when >50V input or discrete FET control is needed; not drop-in for automotive designs requiring Grade 1 compliance.
TPS61088RHLR	Lower 22V max V_OUT, 5A switch, no AEC-Q100 rating, fixed 500kHz f_SW, no FSET or UVLO programming	Better for consumer portable devices; insufficient for 48V tuner bias or automotive pre-boost	Choose only for cost-sensitive non-automotive 12V–20V boost; cannot replace MPQ3425DL-AEC1-LF-P in AEC-Q100 or >22V output designs.

Compared with LM5122MQ/NOPB and TPS61088RHLR, MPQ3425DL-AEC1-LF-P uniquely combines AEC-Q100 Grade 1 qualification, 55V output capability, integrated BIAS LDO, and programmable UVLO/f_SW in a single QFN-14 package - making it the only direct fit for automotive pre-boost and RF bias where reliability, voltage range, and configurability are jointly critical.

Availability

MPQ3425DL-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive infotainment power rails, ADAS camera module bias supplies, and industrial sensor excitation circuits requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MPQ3425DL-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 over two decades of expertise in DC-DC conversion, motor drivers, and LED lighting solutions.

The MPQ3425 belongs to MPS's automotive-grade boost converter product line, designed specifically for demanding AEC-Q100 environments including engine control, body electronics, and advanced driver-assistance systems where high efficiency, small footprint, and robust thermal performance are essential.

FAQ

What is the maximum output voltage supported by MPQ3425DL-AEC1-LF-P?

The MPQ3425DL-AEC1-LF-P supports output voltages up to 55V, verified per absolute maximum ratings and typical application circuits in the datasheet. This enables use in high-bias applications such as RF tuners and CCD sensors. Operation above 50V requires careful attention to layout parasitics and external component voltage ratings.

How is switching frequency programmed on this device?

Switching frequency is set by connecting a resistor from the FSET pin to AGND. The internal 0.5V-regulated sink draws current proportional to f_SW; for example, 84.5kΩ yields 550kHz. Table 1 in the datasheet provides exact R_FSET values for 300kHz–1MHz, and the relationship is linear per Equation (1).

Does MPQ3425DL-AEC1-LF-P require external compensation components?

Yes - the COMP pin requires an external RC network (resistor and capacitor to AGND) to stabilize the control loop. Ceramic output capacitors dominate impedance at f_SW, so compensation is configured using poles/zeros derived from C_OUT, R_LOAD, and internal EA parameters. Table 2 in the datasheet lists recommended R_COMP/C_COMP values for common configurations.

What is the purpose of the BIAS pin, and what voltage range does it accept?

The BIAS pin supplies the internal LDO that powers the gate driver and control circuitry. It accepts 3.1V to 22V, independent of VIN, allowing flexible bias sourcing (e.g., from a separate 5V or 12V rail) to improve efficiency and reduce thermal stress during low-VIN operation.

Can MPQ3425DL-AEC1-LF-P operate in SEPIC topology?

Yes - the MPQ3425 is explicitly validated for SEPIC operation per its Applications section and Figure 5 in the datasheet. Its current-mode architecture and wide duty cycle capability (up to ~90%) support stable non-inverting buck-boost conversion where input voltage may fall below or rise above output voltage.

Is the exposed thermal pad electrically connected?

Yes - the exposed pad on the QFN-14 package is internally connected to PGND and must be soldered to a PCB thermal plane tied to power ground. This connection is mandatory for achieving specified θ_JA = 50°C/W and preventing thermal shutdown under full load.

What protection features are integrated into this IC?

MPQ3425DL-AEC1-LF-P integrates under-voltage lockout (UVLO) with programmable hysteresis, cycle-by-cycle current limiting (3.5A typical), and thermal shutdown at 160°C. All protections are fully autonomous and do not require external components - they reset automatically after fault removal and thermal cooldown.

MPQ3425DL-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:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 3.1V

Voltage - Input (Max):: 22V

Voltage - Output (Min/Fixed):: 3.1V

Voltage - Output (Max):: 55V

Current - Output:: 3A

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)

MPQ3425DL-AEC1-LF-P FAQ

1.How can I place an order for MPQ3425DL-AEC1-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ3425DL-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 MPQ3425DL-AEC1-LF-P reliable?

The price and inventory of MPQ3425DL-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 MPQ3425DL-AEC1-LF-P is usually 5 days.

3.What payment methods are accepted for MPQ3425DL-AEC1-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3425DL-AEC1-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ3425DL-AEC1-LF-P?

MPQ3425DL-AEC1-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ3425DL-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 MPQ3425DL-AEC1-LF-P?

For technical support, including MPQ3425DL-AEC1-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3425DL-AEC1-LF-P requirements.

6.How does Aetrix verify that MPQ3425DL-AEC1-LF-P is sourced from the original manufacturer or authorized distributors?

All MPQ3425DL-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 MPQ3425DL-AEC1-LF-P meets industry standards.

7.What is the process for return or replacement of MPQ3425DL-AEC1-LF-P?

All MPQ3425DL-AEC1-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3425DL-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 MPQ3425DL-AEC1-LF-P part is unused and in its original packaging.

Return procedure for MPQ3425DL-AEC1-LF-P:

1.Submit a request within 90 days.

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

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