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

Monolithic Power Systems Inc. MPQ4322GLE-AEC1-Z

Name: MPQ4322GLE-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4322GLE-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4322GLE-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-PowerVFQFN

Datasheet:: MPQ4322GLE-AEC1-Z.pdf

Description:: IC REG BUCK ADJ 2A 12QFN

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Product details

Overview

MPQ4322GLE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 70mΩ/50mΩ MOSFETs, delivering up to 2A output current across a 3.3V–36V input range and tolerating 42V automotive load dump transients. It features 1μA shutdown current, configurable 350kHz–2.5MHz switching frequency, and operates from –40°C to +150°C junction temperature - deployed in ADAS camera modules requiring robust cold-crank (3.1V) and low-I_Q operation.

For engineers reviewing the MPQ4322GLE-AEC1-Z datasheet, MPQ4322GLE-AEC1-Z pinout, MPQ4322GLE-AEC1-Z application, or MPQ4322GLE-AEC1-Z equivalent, key selection criteria include load-dump tolerance, wettable-flank QFN-12 (3mm×4mm) thermal performance, CISPR25 Class 5 EMI compliance, and LDO-mode support for automotive battery brownouts.

Technical Context

The MPQ4322GLE-AEC1-Z implements peak current mode control with frequency foldback during startup to prevent inductor current runaway. Its integrated high-side and low-side MOSFETs enable high-efficiency regulation across light-to-full load via asynchronous modulation (AAM) and dynamic frequency scaling.

It supports fixed-output (1V–5V) or adjustable configurations using external feedback dividers, with precise 0.8V ±1% reference voltage and open-drain power-good monitoring (94.5%–105.5% window). Thermal shutdown at 160°C–185°C and hiccup-mode over-current protection ensure fault resilience in automotive environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 36V - supports full automotive battery range including cold-crank down to 3.1V after startup.
Load Dump Tolerance	42V - meets ISO16750-2 pulse 5a requirements for engine-off transients.
Output Current	2A continuous - sufficient for powering SoC cores, image sensors, or radar MMICs in ADAS subsystems.
Quiescent Current	20μA in sleep mode - extends battery life in always-on vehicle networks (e.g., parking cameras).
Switching Frequency	350kHz to 2.5MHz - configurable via external resistor to optimize EMI, size, and efficiency trade-offs.
Thermal Rating	–40°C to +150°C T_J - validated for under-hood placement per AEC-Q100 Grade 1.
EMI Compliance	CISPR25 Class 5 - verified with standard filter layout, enabling faster automotive EMC certification.

Pinout & Package

MPQ4322GLE-AEC1-Z uses a wettable-flank QFN-12 package (3mm × 4mm), optimized for automated optical inspection (AOI) and thermal dissipation (θ_JA = 50°C/W on JEDEC board). The symmetric VIN pinout and MeshConnect™ flip-chip construction reduce parasitic inductance and improve EMI performance.

Pin/Terminal	Circuit Role	Design Meaning
1, 11 PGND	Power ground return	Low-impedance path for high di/dt switch-node currents; requires local decoupling to minimize ground bounce.
2, 10 VIN	Main input supply	Dual pins reduce trace resistance and thermal stress; internally connected to power control circuitry and MOSFET sources.
3 BOOT	High-side gate driver supply	Requires 0.1μF ceramic capacitor between BOOT and SW to sustain HS-FET turn-on during duty cycles >90%.
4 FREQ	Frequency configuration	Resistor-to-AGND sets f_SW; enables precise EMI band placement and inductor size optimization.
5 VCC	Bias regulator output	Internal LDO supplies gate drivers; requires ≥1μF ceramic cap to AGND for stability under transient loads.
6 AGND	Analog reference ground	Separate from PGND to isolate feedback loop noise; must be tied at single point near FB pin.
7 FB	Feedback voltage sense	0.8V reference input; connects to divider midpoint for adjustable outputs or directly to VOUT for fixed versions.
8 PG	Power-good indicator	Open-drain output signals valid regulation (±5.5% window); requires external pull-up for system sequencing.
9 EN	Enable control	Logic-level input (1.02V threshold); no internal pull-up; must be actively driven to avoid undefined state.
12 SW	Switch node	Connection point of HS-FET source and LS-FET drain; critical for PCB layout - minimize loop area with input cap and inductor.

Key Features

Feature	Design Value
Wettable Flank QFN	Enables reliable solder-joint inspection in automotive SMT lines without X-ray; improves long-term reliability under thermal cycling.
Frequency Spread Spectrum (FSS)	±10% modulation at 15kHz reduces peak EMI by >10dB, easing CISPR25 Class 5 compliance without added filtering.
Low-Dropout (LDO) Mode	Maintains regulation down to VIN = VOUT + 0.3V during cold-crank, eliminating need for pre-regulator stages.
Advanced Asynchronous Modulation (AAM)	Reduces light-load IQ to 20μA while preserving regulation accuracy - critical for always-on infotainment standby.
Hiccup Over-Current Protection	Auto-retry behavior prevents thermal runaway during sustained short-circuit faults, supporting safe fail-operational design.

Applications

Automotive Infotainment

ADAS Camera Module

Use Scenario: Powering display processors and touch controllers in head-unit systems with variable battery voltage and EMI-sensitive audio paths.

IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying SoC I/O rails and memory interfaces.

Use Value: 42V load-dump tolerance eliminates need for upstream TVS clamping; FSS and symmetric VIN reduce conducted emissions below CISPR25 limits.

Use Scenario: Supplying image sensor and ISP in rear-view or surround-view cameras exposed to under-hood thermal stress.

IC Role / Device Role / Timing Role: High-reliability 3.3V/1.8V point-of-load regulator operating continuously at 125°C ambient.

Use Value: AEC-Q100 Grade 1 qualification and 150°C T_J rating ensure functional safety compliance; wettable flanks enable AOI verification.

Automotive Cluster Display

Industrial Vehicle Telematics

Use Scenario: Driving TFT-LCD backlight drivers and microcontroller peripherals in digital instrument clusters with tight space constraints.

IC Role / Device Role / Timing Role: Compact 2A buck converter replacing discrete solutions in 2-layer PCB layouts.

Use Value: QFN-12 (3mm×4mm) footprint saves >40% board area vs. legacy SOIC packages; 65ns t_{ON_MIN} supports high-VIN, low-VOUT ratios.

Use Scenario: Providing stable 5V rail for LTE modems and GNSS receivers in fleet management gateways subjected to wide-temperature outdoor operation.

IC Role / Device Role / Timing Role: Input-tolerant DC/DC front-end handling 9V–36V battery variations and load-dump surges.

Use Value: 1μA shutdown current enables multi-year battery backup; thermal shutdown hysteresis prevents oscillation during overload.

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
MPQ4322GDE-AEC1-Z	Same silicon, QFN-12 (2mm×3mm) package with lower thermal dissipation (3.5W vs. 3.6W) and higher θ_JA (60°C/W).	Better suited for space-constrained but thermally benign locations (e.g., center console), not under-hood.	Select when PCB area is critical and peak load is <1.8A at TA ≤ 85°C.
TI LM61480QPWRQ1	42V-rated, 8A capable, but larger QFN-16 (3.5mm×4.5mm); 25μA IQ; no wettable flanks; requires external compensation.	Targets higher-power ADAS ECUs; lacks integrated FSS and AAM; needs more design validation effort.	Choose only if >2A output or dual-rail capability is required; adds BOM and layout complexity.

Compared with MPQ4322GDE-AEC1-Z, the MPQ4322GLE-AEC1-Z offers superior thermal margin and AOI compatibility; versus LM61480QPWRQ1, it delivers smaller footprint, lower IQ, and faster time-to-compliance via integrated EMI features.

Availability

MPQ4322GLE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, digital instrument clusters, and industrial telematics requiring stable component supply across extended temperature and high-reliability automotive qualification.

Supply support for MPQ4322GLE-AEC1-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 power management ICs for automotive, industrial, and consumer markets.

The MPQ4322 product line targets AEC-Q100-compliant DC/DC conversion in harsh automotive environments, emphasizing load-dump resilience, ultra-low quiescent current, and EMI-optimized integration for next-generation ADAS and infotainment systems.

FAQ

What is the minimum input voltage required for startup?

The MPQ4322GLE-AEC1-Z requires a minimum VIN of 3.9V to initiate startup due to its UVLO rising threshold of 3.4V–3.9V. Once running, it sustains regulation down to 3.1V in low-dropout mode - essential for automotive cold-crank conditions where battery voltage dips below 6V.

Does this device support adjustable output voltage?

Yes. The MPQ4322GLE-AEC1-Z supports both fixed-output versions (1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, 5V) and adjustable operation. For adjustable use, connect the FB pin to the center of an external resistor divider between VOUT and AGND to set output voltage per V_OUT = 0.8V × (1 + R1/R2).

How is the switching frequency configured?

Switching frequency is set by connecting an external resistor between the FREQ pin and AGND. Values from 15kΩ to 100kΩ yield 1.98MHz to 415kHz respectively. The device also supports frequency spread spectrum (FSS) modulation to reduce EMI peaks by ±10% around the nominal f_SW.

What thermal performance can be expected in the QFN-12 (3mm×4mm) package?

On a standard 4-layer JEDEC board, the MPQ4322GLE-AEC1-Z achieves θ_JA = 50°C/W and θ_JC = 7.5°C/W. With proper copper pour and thermal vias, it delivers 3.6W continuous power dissipation at 25°C ambient - sufficient for 2A loads at 12V_IN/5V_OUT with <20°C case rise.

Is the PG pin compatible with 1.8V logic systems?

Yes. The open-drain PG pin is compatible with any logic supply up to 6V. When pulled up to 1.8V, it asserts high when VOUT is within 94.5%–105.5% of nominal, and pulls low (≤0.3V) outside that window - enabling direct interfacing with low-voltage microcontrollers without level-shifting.

What protection features are integrated?

The device integrates hiccup-mode over-current protection (triggering at 2.7A–4.6A HS peak current), thermal shutdown (160°C–185°C), input over-voltage lockout (35.5V–40V), and undervoltage lockout (3.4V–3.9V rising). All protections auto-recover without external intervention, ensuring robust operation in unattended automotive systems.

Can the MPQ4322GLE-AEC1-Z replace older MPS buck converters like MPQ4312?

No. While both are AEC-Q100 buck regulators, MPQ4322GLE-AEC1-Z offers higher 2A output, 42V load-dump tolerance, wettable flanks, and FSS - whereas MPQ4312 is rated for 1.2A and 40V max. Pinout and compensation differ; direct replacement requires layout and firmware validation.

MPQ4322GLE-AEC1-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 12-PowerVFQFN

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):: 3.3V

Voltage - Input (Max):: 36V

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

Voltage - Output (Max):: 34.2V

Current - Output:: 2A

Frequency - Switching:: 350kHz ~ 2.5MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 12-QFN (3x4)

MPQ4322GLE-AEC1-Z FAQ

1.How can I place an order for MPQ4322GLE-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4322GLE-AEC1-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 MPQ4322GLE-AEC1-Z reliable?

The price and inventory of MPQ4322GLE-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4322GLE-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ4322GLE-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4322GLE-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4322GLE-AEC1-Z?

MPQ4322GLE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4322GLE-AEC1-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 MPQ4322GLE-AEC1-Z?

For technical support, including MPQ4322GLE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4322GLE-AEC1-Z requirements.

6.How does Aetrix verify that MPQ4322GLE-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4322GLE-AEC1-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 MPQ4322GLE-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ4322GLE-AEC1-Z?

All MPQ4322GLE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4322GLE-AEC1-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 MPQ4322GLE-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ4322GLE-AEC1-Z:

1.Submit a request within 90 days.

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

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