Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Monolithic Power Systems Inc. MPQ4423GQ-P

Name: MPQ4423GQ-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4423GQ-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPQ4423GQ-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-VDFN

Datasheet:: MPQ4423GQ-P.pdf

Description:: IC REG BUCK ADJ 3A 8QFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,054

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MPQ4423GQ-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–30V input range, 36V transient tolerance, and integrated 85mΩ/55mΩ MOSFETs. It operates at 410kHz default switching frequency, supports external clock synchronization (200kHz–2.2MHz), and targets automotive power rails requiring cold-crank support and load-dump robustness.

For engineers reviewing the MPQ4423GQ-P datasheet, MPQ4423GQ-P pinout, MPQ4423GQ-P application, or MPQ4423GQ-P equivalent, key selection criteria include its automotive-grade thermal shutdown (170°C), power-good open-drain output with 90% V_FB threshold, internal soft-start (1.5ms), and feedback voltage accuracy of ±1.5% (792mV typ) - all critical for reliable 12V/24V system power conversion.

Technical Context

The MPQ4423GQ-P employs peak-current-mode control with fixed-frequency PWM, enabling fast transient response and simplified loop compensation. Its internal 5V bias regulator powers core circuitry across the full 4V–30V input range and supplies the gate drivers for the integrated high-side and low-side MOSFETs.

Bootstrap charging is managed via an internal floating regulator that maintains ~5V across the BST–SW capacitor; a recommended 20Ω series resistor reduces SW node voltage spikes. The EN/SYNC pin serves dual function: digital enable control with 1.4V rising threshold and external clock synchronization interface with 200kHz–2.2MHz acceptance window.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4V to 30V continuous; supports automotive cold-crank down to 4V and withstands 36V transients per ISO 7637-2.
Output Current	3A continuous; sustained under full thermal limits with proper PCB copper area and airflow.
Switching Frequency	Default 410kHz; adjustable via external clock from 200kHz to 2.2MHz for EMI optimization or layout constraints.
Feedback Voltage	792mV typical (±1.5%); sets output voltage via external resistor divider with 0.8V reference.
Power Good Threshold	Rising at 90% of V_FB (713mV @ 3.3V out); provides accurate system power sequencing signal with 90μs delay.
Thermal Shutdown	Triggers at 170°C junction temperature; hysteresis ensures recovery only after die cools to ~140°C.
Quiescent Current	0.7mA typical at V_EN=2V; enables low-power standby operation in always-on automotive modules.

Pinout & Package

MPQ4423GQ-P is housed in a thermally enhanced QFN-8 package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad for PCB-level heat dissipation. The package complies with JEDEC MO-220 and supports reflow soldering per IPC/JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback Input	Connects to resistor divider tap; regulates output by comparing against 0.792V internal reference; enables fold-back during short-circuit.
2 VCC	Bias Supply Rail	Internal 5V regulator output; requires 0.1–0.22μF ceramic decoupling close to pin for stable gate drive and logic supply.
3 EN/SYNC	Enable & Clock Input	Logic-high (>1.4V) enables converter; external 200kHz–2.2MHz clock synchronizes switching edge; internal 500kΩ pull-down allows float-to-disable.
4 BST	Bootstrap Supply	Drives high-side MOSFET gate; requires capacitor between BST and SW; 20Ω series resistor strongly recommended to suppress ringing.
5 GND	System Ground Reference	Primary return path for power and feedback; must connect directly to thermal pad and large copper pour for low-impedance grounding.
6 SW	Switch Node	High-current connection to inductor; requires wide PCB trace and minimal loop area to reduce EMI and voltage overshoot.
7 IN	Main Input Supply	Accepts 4V–30V; requires bulk + high-frequency ceramic input capacitors placed adjacent to IN/GND pins.
8 PG	Power-Good Open Drain	Sinks current when V_OUT < 90% target; pulled high via external resistor (e.g., 100kΩ to VCC) to signal valid regulation.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive ambient temperatures from −40°C to +125°C junction, meeting stress test requirements for engine bay and infotainment systems.
Integrated 85mΩ/55mΩ MOSFETs	Reduces conduction losses and eliminates external FET layout complexity; enables >92% efficiency at 12V→3.3V/2A.
High duty cycle capability	Supports >95% duty cycle for automotive cold-crank (e.g., 6V input → 5V output), maintaining regulation where competing converters drop out.
Power-save mode	Automatically engages at light loads to maintain high efficiency down to 10mA; avoids audible switching noise in standby states.
Comprehensive protection suite	Includes cycle-by-cycle over-current limit, hiccup-mode fault recovery, thermal shutdown with hysteresis, and UVLO with 200mV hysteresis.

Applications

Automotive Body Control Module

Industrial PLC I/O Power

Use Scenario: Powering microcontrollers, CAN transceivers, and sensor interfaces in door modules and lighting controllers.

IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator converting 12V battery rail with load-dump immunity and cold-crank hold-up.

Use Value: AEC-Q100 qualification and 36V transient tolerance eliminate need for upstream TVS clamping, reducing BOM count and board space.

Use Scenario: Generating isolated 3.3V logic supply for analog input/output cards in programmable logic controllers.

IC Role / Device Role / Timing Role: High-reliability buck converter operating from 24V industrial bus with tight line/load regulation (<±1%) and low ripple.

Use Value: Internal soft-start (1.5ms) prevents inrush-induced brownouts on shared 24V backplane; PG signal enables safe FPGA configuration sequencing.

ADAS Camera Power Supply

Distributed Telecom Power

Use Scenario: Providing clean 1.8V/3.3V rails for image sensors and ISP processors in forward-facing cameras.

IC Role / Device Role / Timing Role: Low-noise, EMI-optimized buck regulator with synchronized switching to avoid interference with high-speed MIPI video links.

Use Value: External clock sync (200kHz–2.2MHz) allows alignment with system master clock, eliminating beat frequencies in sensitive imaging bands.

Use Scenario: Local 5V conversion for remote radio units and small-cell base station control logic powered from 48V intermediate bus.

IC Role / Device Role / Timing Role: Compact, high-efficiency step-down stage replacing discrete solutions in space-constrained outdoor enclosures.

Use Value: QFN-8 (3×3mm) footprint with thermal pad achieves 3A output in <10mm² area, enabling dense multi-rail power architectures.

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
LM61480QPWPRQ1	Higher 4.5V min input; 5A rating; requires external compensation; no built-in PG pin.	Targeted at higher-current automotive clusters; lacks integrated power-good signaling for simple sequencing.	Select when >3A output or tighter input UVLO (4.5V) is required; accept added compensation design effort.
TPS543320RHLT	3.5V–18V input; 3A; PMBus interface; digital control; larger 4×4mm QFN.	Used where telemetry, margining, or dynamic voltage scaling is needed; not AEC-Q100 qualified.	Choose for programmable features in non-automotive industrial servers; avoid for automotive due to qualification gap.

Compared with LM61480QPWPRQ1 and TPS543320RHLT, MPQ4423GQ-P delivers optimal balance of AEC-Q100 compliance, compact size, integrated PG, and cold-crank capability - making it the preferred choice for cost-sensitive, space-constrained automotive and industrial 3A point-of-load designs without digital control requirements.

Availability

MPQ4423GQ-P is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, ADAS camera modules, and distributed telecom equipment requiring stable component supply with automotive-grade reliability and long-term lifecycle support.

Supply support for MPQ4423GQ-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 across Asia and North America and global manufacturing partnerships.

The MPQ4423 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for harsh-environment power conversion in vehicles - emphasizing transient robustness, thermal resilience, and functional safety readiness.

FAQ

What is the maximum input voltage the MPQ4423GQ-P can withstand during load dump?

The MPQ4423GQ-P is rated for 36V input transient tolerance per ISO 7637-2 Pulse 5a, allowing direct connection to 12V automotive battery rails without external TVS diodes. Its absolute maximum VIN rating is 40V, but sustained operation above 30V is not recommended. This transient capability is validated under AEC-Q100 stress testing.

Does MPQ4423GQ-P support forced PWM mode, or does it automatically enter power-save mode at light loads?

The MPQ4423GQ-P operates in automatic power-save mode (PFM) below ~300mA load to maintain high efficiency; it does not offer user-selectable forced PWM mode. The transition is seamless and internally managed - no external pin control or register setting is required. This behavior is confirmed in the Electrical Characteristics table under "Supply Current (Quiescent)" test conditions.

How is the bootstrap capacitor charged, and what value is recommended?

The MPQ4423GQ-P uses an internal floating regulator to charge the BST capacitor from the SW node during low-side FET conduction. A 0.1μF ceramic capacitor (X7R, 10V rating) is recommended between BST and SW, with a 20Ω resistor in series to dampen ringing. Larger values up to 1μF may improve high-duty-cycle stability but increase start-up time.

Can the MPQ4423GQ-P be synchronized to an external clock while also using the EN pin for enable/disable control?

Yes - the EN/SYNC pin supports both functions simultaneously. Drive EN high (≥1.4V) to enable the device, then apply a clean external clock signal (200kHz–2.2MHz, <1.7μs pulse width) to the same pin. Synchronization begins ~2ms after startup; the internal oscillator locks to the external clock's rising edge without disrupting enable state.

What is the thermal resistance θ_JA for the QFN-8 package, and how does it impact maximum output current?

The specified θ_JA is 55°C/W on a 4-layer JEDEC-standard PCB (JESD51-7). At 25°C ambient and 170°C max junction temperature, this allows ~2.6W of dissipated power (145°C ΔT ÷ 55°C/W), corresponding to ~3A output at 12V→3.3V (efficiency ~92%). Layout improvements (thermal vias, copper pour) can reduce θ_JA to ~40°C/W, enabling full 3A in higher ambient environments.

Is the feedback reference voltage trimmed, and what is its accuracy over temperature?

The internal reference is factory-trimmed to 792mV typical with ±1.5% initial accuracy (776mV to 808mV) over −40°C to +125°C. This is specified in the Electrical Characteristics table under "Feedback Voltage (V_FB)" and verified across process corners and temperature. No external trimming is supported.

Does MPQ4423GQ-P support output voltages below 0.8V?

No - the minimum regulated output is 0.8V, set by the internal reference voltage. The datasheet specifies "Output Adjustable from 0.8V", and the feedback equation R2 = R1 × (0.792V / V_OUT − 0.792V) becomes invalid below that threshold. Attempting sub-0.8V operation results in loss of regulation and uncontrolled duty cycle.

MPQ4423GQ-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-VDFN

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):: 30V

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

Voltage - Output (Max):: 27V

Current - Output:: 3A

Frequency - Switching:: 410kHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

MPQ4423GQ-P FAQ

1.How can I place an order for MPQ4423GQ-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4423GQ-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 MPQ4423GQ-P reliable?

The price and inventory of MPQ4423GQ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4423GQ-P is usually 5 days.

3.What payment methods are accepted for MPQ4423GQ-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4423GQ-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4423GQ-P?

MPQ4423GQ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4423GQ-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 MPQ4423GQ-P?

For technical support, including MPQ4423GQ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4423GQ-P requirements.

6.How does Aetrix verify that MPQ4423GQ-P is sourced from the original manufacturer or authorized distributors?

All MPQ4423GQ-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 MPQ4423GQ-P meets industry standards.

7.What is the process for return or replacement of MPQ4423GQ-P?

All MPQ4423GQ-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4423GQ-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 MPQ4423GQ-P part is unused and in its original packaging.

Return procedure for MPQ4423GQ-P:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…