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

Monolithic Power Systems Inc. MPQ4423HGQE-AEC1-P

Name: MPQ4423HGQE-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4423HGQE-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4423HGQE-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-VDFN Exposed Pad

Datasheet:: MPQ4423HGQE-AEC1-P.pdf

Description:: IC REG BUCK ADJ 3A 8QFN

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Product details

Overview

MPQ4423HGQE-AEC1-P from Monolithic Power Systems is a high-efficiency, AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering 3A continuous output current with 4V–36V input range, 0.8V adjustable output, and integrated 85mΩ/55mΩ MOSFETs - deployed in automotive infotainment power rails, ADAS camera modules, and engine control unit (ECU) auxiliary supplies.

For engineers reviewing the MPQ4423HGQE-AEC1-P datasheet, MPQ4423HGQE-AEC1-P pinout, MPQ4423HGQE-AEC1-P application, or MPQ4423HGQE-AEC1-P equivalent, key selection criteria include cold-crank support (95% max duty cycle), wettable flank QFN-8 package for automated optical inspection, power-good signaling with 90μs delay, and 200kHz–2.2MHz external clock synchronization capability.

Technical Context

The MPQ4423HGQE-AEC1-P uses peak-current-mode control with internal compensation, enabling stable regulation across wide load and line variations without external loop components. Its fixed 410kHz default switching frequency supports compact magnetics, while external sync capability allows EMI optimization in noise-sensitive automotive domains.

It integrates dual MOSFETs with matched R_DS(ON) (85mΩ HS / 55mΩ LS), a bootstrap driver with 20Ω recommended series resistor, and a dedicated 5V internal VCC regulator powered from VIN - enabling operation down to 4V input, critical for automotive cold-crank conditions where battery voltage drops to 3.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4V to 36V - supports full automotive battery range including cold-crank (down to 3.5V UVLO falling threshold).
Output Current	3A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in automotive subsystems.
Switching Frequency	Default 410kHz, synchronizable 200kHz–2.2MHz - enables EMI spread-spectrum tuning and avoids AM radio band interference.
Feedback Reference	792mV ±12mV - sets precise output voltage via external resistor divider; enables 0.8V minimum output for low-voltage logic rails.
Thermal Shutdown	170°C activation with 30°C hysteresis - protects against sustained overload or poor PCB thermal design in enclosed ECUs.
Power Good Threshold	Rising at 90% of V_FB, falling at 84% - provides reliable system-level power sequencing and fault detection with 90μs delay.
Quiescent Current	0.7mA typical - minimizes standby power loss in always-on vehicle modules such as telematics gateways.

Pinout & Package

MPQ4423HGQE-AEC1-P is housed in a wettable flank QFN-8 (3mm × 3mm) package optimized for automated optical inspection (AOI) and solder joint reliability in automotive production. The exposed thermal pad must be connected to a solid ground plane via multiple vias for thermal performance.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback Input	Connects to resistor divider tap; regulates output by comparing against 792mV reference; triggers fold-back mode below 660mV during short-circuit.
2 VCC	Bias Supply Rail	Internally regulated 5V supply for control circuitry; requires 0.1–0.22μF ceramic decoupling capacitor near pin.
3 EN/SYNC	Enable & Clock Input	Logic-high enables operation; external 200kHz–2.2MHz clock synchronizes switching edge; includes 1.4V rising threshold and 150mV hysteresis.
4 BST	Bootstrap Supply	Drives high-side MOSFET gate; requires capacitor between BST and SW; 20Ω series resistor strongly recommended to suppress SW node ringing.
5 GND	System Ground Reference	Primary ground return for output regulation; must connect directly to thermal pad and large copper pour with multiple vias.
6 SW	Switch Node Output	Connects to inductor; carries high di/dt pulsed current; requires wide, low-inductance PCB trace and tight layout to minimize EMI.
7 IN	Main Input Supply	Accepts 4V–36V; requires bulk + high-frequency ceramic input capacitors placed adjacent to IN/GND pins per layout guidelines.
8 PG	Power-Good Open-Drain	Signals valid output (high when V_OUT ≥ 90% of setpoint); pulled low during thermal shutdown, EN deassertion, or output undervoltage.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Rated for −40°C to +125°C junction temperature - validated for under-hood automotive applications without derating.
Wettable flank QFN-8 package	Enables AOI-compatible solder joint inspection - critical for zero-defect manufacturing in Tier 1 automotive supply chains.
High-duty-cycle operation	95% maximum duty cycle - sustains regulation during automotive cold-crank events where input drops to 3.5V while maintaining 5V output.
Integrated power-save mode	Automatically transitions to pulse-skipping at light loads - maintains >85% efficiency down to 10mA output current.
Internal soft-start	1.5ms ramp time - prevents inrush current and output overshoot during power-up in systems with large downstream capacitance.

Applications

Automotive Infotainment

ADAS Camera Module

Use Scenario: Powering SoC, display interface, and audio codec in head-unit systems with variable battery input and strict EMI limits.

IC Role / Device Role / Timing Role: Primary 3.3V/2.5V buck regulator supplying core logic and I/O rails; synchronized to system clock to avoid beat frequencies.

Use Value: 410kHz base frequency + external sync eliminates switching noise in audio band; wettable flank package ensures IPC-A-610 Class 3 solder joint compliance.

Use Scenario: Providing stable 1.8V and 3.3V rails to CMOS image sensor and ISP in forward-facing driver assistance cameras.

IC Role / Device Role / Timing Role: Dual-output capable via feedback network configuration; PG signal enables sensor initialization only after rail stabilization.

Use Value: 792mV reference tolerance (±1.5%) ensures <±2% output accuracy; thermal shutdown prevents field failure during sun-load thermal stress.

Engine Control Unit (ECU)

Telematics Control Unit (TCU)

Use Scenario: Generating 5V auxiliary supply for microcontroller, CAN transceiver, and sensor interfaces in engine bay environments.

IC Role / Device Role / Timing Role: High-input-range buck converter handling cold-crank (3.5V) and load-dump (40V transient) conditions with internal protection.

Use Value: 36V absolute max input rating and 95% duty cycle sustain regulation during cranking; OCP hiccup mode prevents thermal runaway during shorted sensor lines.

Use Scenario: Powering LTE modem, GNSS receiver, and secure MCU in always-on cellular gateway modules requiring low quiescent current.

IC Role / Device Role / Timing Role: Standby-mode regulator with 0.7mA IQ and programmable EN threshold - enables wake-on-CAN while minimizing battery drain.

Use Value: 8μA shutdown current extends parked vehicle battery life; PG signal coordinates secure boot sequence with hardware watchdog.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM61480QRNXTQ1	4.5V–36V input, 8A output, 2.1MHz max frequency; larger QFN-16 package; no wettable flank option.	Higher current capacity suits multi-rail TCU designs but requires more board area and thermal management.	Select when >3A output or higher switching frequency is required; not drop-in due to pinout and footprint mismatch.
TPS543B20RSAR	4.5V–18V input, 3A output, PMBus interface, 500kHz–2.2MHz sync; requires external MOSFETs.	Digital control enables dynamic voltage scaling and telemetry, but adds complexity and BOM count.	Choose for systems needing real-time telemetry or adaptive voltage scaling; not suitable for 24V truck applications due to 18V VIN limit.

Compared with LM61480QRNXTQ1 and TPS543B20RSAR, MPQ4423HGQE-AEC1-P delivers optimal balance of AEC-Q100 compliance, wettable flank manufacturability, cold-crank robustness, and minimal external component count - making it ideal for cost- and space-constrained automotive subsystems where 3A output suffices.

Availability

MPQ4423HGQE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and engine control units requiring stable component supply with full AEC-Q100 traceability and PPAP documentation support.

Supply support for MPQ4423HGQE-AEC1-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ4423H product line targets automotive-grade power management, emphasizing AEC-Q100 qualification, wettable flank packaging, and cold-crank resilience for safety-critical and mission-reliability applications.

FAQ

What is the purpose of the BST pin and why is a 20Ω resistor recommended?

The BST pin supplies the floating gate drive voltage for the high-side MOSFET via an external bootstrap capacitor between BST and SW. A 20Ω resistor in series with the BST capacitor reduces voltage spikes on the SW node during switching transitions, preventing false triggering of the high-side driver and improving EMI performance - especially critical in automotive EMC testing.

Does MPQ4423HGQE-AEC1-P support output voltages below 1V?

Yes - the device features a 792mV ±12mV internal reference, enabling output voltages as low as 0.8V using an external resistor divider. This supports modern low-voltage processors and FPGAs; however, layout precision and resistor tolerance become critical below 1.2V to maintain ±2% regulation accuracy.

How does the power-good (PG) pin behave during startup and fault conditions?

The PG pin is an open-drain output that remains low until V_FB reaches 90% of the reference (792mV), then asserts high after a 90μs delay. It pulls low during thermal shutdown, EN deactivation, or if V_FB falls to 84% of reference - providing deterministic sequencing and fault signaling without external supervision circuitry.

Can MPQ4423HGQE-AEC1-P operate with input voltage below 4V?

No - the absolute minimum operating input is 4V per datasheet specifications. Although the UVLO falling threshold is 3.3V, the internal VCC regulator cannot sustain control circuitry below 4V, and guaranteed 3A output performance is specified only from 4V onward. Operation below 4V may result in undefined behavior or regulation loss.

What distinguishes the "-AEC1" and "-AEC1-P" suffixes in the part number?

The "-AEC1" suffix denotes AEC-Q100 Grade 1 qualification (−40°C to +125°C). The "-P" suffix indicates tape-and-reel packaging per JEDEC standard J-STD-020 - confirming moisture sensitivity level (MSL) 3 and factory-sealed dry pack, essential for SMT line compatibility and long-term storage integrity in automotive manufacturing.

Is external compensation required for stable loop operation?

No - the MPQ4423HGQE-AEC1-P includes an optimized internal compensation network designed for stability with standard output capacitor ESR ranges (10mΩ–100mΩ) and inductors from 1µH to 10µH. External compensation is unnecessary unless custom transient response or ultra-low-noise requirements demand fine-tuning.

How does hiccup-mode over-current protection function during a sustained short circuit?

When FB drops below 84% of reference due to overload, the device enters hiccup mode: it disables switching, waits ~5ms, then attempts restart. This cycle repeats, limiting average short-circuit current to ~1.2A and die temperature rise - protecting both the IC and PCB traces during extended fault conditions without requiring external current-limit circuitry.

MPQ4423HGQE-AEC1-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-VDFN 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):: 4V

Voltage - Input (Max):: 36V

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

Voltage - Output (Max):: 32.4V

Current - Output:: 3A

Frequency - Switching:: 410kHz

Synchronous Rectifier:: Yes

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 8-QFN (3x3)

MPQ4423HGQE-AEC1-P FAQ

1.How can I place an order for MPQ4423HGQE-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4423HGQE-AEC1-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 MPQ4423HGQE-AEC1-P reliable?

The price and inventory of MPQ4423HGQE-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4423HGQE-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ4423HGQE-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4423HGQE-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4423HGQE-AEC1-P?

MPQ4423HGQE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4423HGQE-AEC1-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 MPQ4423HGQE-AEC1-P?

For technical support, including MPQ4423HGQE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4423HGQE-AEC1-P requirements.

6.How does Aetrix verify that MPQ4423HGQE-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ4423HGQE-AEC1-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 MPQ4423HGQE-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ4423HGQE-AEC1-P?

All MPQ4423HGQE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4423HGQE-AEC1-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 MPQ4423HGQE-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ4423HGQE-AEC1-P:

1.Submit a request within 90 days.

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

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