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

Monolithic Power Systems Inc. MPQ4320GDE-AEC1-P

Name: MPQ4320GDE-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4320GDE-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4320GDE-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-PowerVFQFN

Datasheet:: MPQ4320GDE-AEC1-P.pdf

Description:: IC REG BUCK ADJ 500MA 12QFN

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Product details

Overview

MPQ4320GDE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter with integrated 70mΩ high-side and 50mΩ low-side MOSFETs, delivering up to 0.5A output current across a 3.3V–36V input range and surviving 42V automotive load dump transients. It features 1μA shutdown current, configurable 350kHz–1.8MHz switching frequency, and operates from –40°C to +150°C junction temperature - deployed in automotive infotainment power rails.

For engineers reviewing the MPQ4320GDE-AEC1-P datasheet, MPQ4320GDE-AEC1-P pinout, MPQ4320GDE-AEC1-P application, or MPQ4320GDE-AEC1-P equivalent, key selection criteria include load-dump tolerance, cold-crank support down to 3.1V VIN, low-I_Q operation in battery-backed systems, and CISPR25 Class 5 EMI compliance for automotive subsystems.

Technical Context

The MPQ4320GDE-AEC1-P uses peak current mode control with frequency foldback during start-up to prevent inductor current runaway. Its advanced asynchronous modulation (AAM) reduces light-load switching losses, while minimum on/off times (65ns/50ns) enable high duty-cycle operation under cold-crank conditions.

Integrated MeshConnect™ flip-chip QFN-12 (2mm×3mm) package with wettable flanks delivers low thermal resistance (θ_JA = 60°C/W), and symmetric VIN pinout plus spread-spectrum modulation suppresses conducted/radiated EMI per CISPR25 Class 5 requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
Input voltage range	3.3V to 36V - supports full automotive battery range including cold-crank (3.1V min after start-up)
Load dump tolerance	42V - withstands ISO16750-2 transient surges without external clamping
Max output current	0.5A continuous - sufficient for powering microcontrollers, sensors, and display logic in ADAS clusters
Quiescent current	20μA in sleep mode - extends battery life in always-on vehicle modules
Switching frequency	350kHz to 1.8MHz (resistor-programmable) - enables optimization of size vs. efficiency and EMI performance
FB reference voltage	0.8V ±1% - enables precise output regulation for 1V–5V fixed or adjustable outputs
Thermal shutdown	175°C with 20°C hysteresis - ensures fault-tolerant operation under sustained overload or poor PCB heatsinking

Pinout & Package

MPQ4320GDE-AEC1-P is housed in a QFN-12 (2mm × 3mm) package with wettable flanks, optimized for automated optical inspection (AOI) and high-density automotive PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1, 11 PGND	Power ground	Dual low-inductance ground return paths for high-current switching loop; requires local decoupling to minimize noise coupling
2, 10 VIN	Main input supply	Internally connected pins supplying gate drivers and control circuitry; each must have dedicated 10µF ceramic capacitor to PGND
3 BOOT	Bootstrap supply	Drives high-side FET gate; requires 0.1µF ceramic capacitor between BOOT and SW to sustain gate voltage during high-duty cycles
4 FREQ	Frequency configuration	Resistor-to-AGND sets f_SW; 86.6kΩ yields 415kHz - balances efficiency, size, and EMI for mid-power applications
5 VCC	Bias regulator output	Internal LDO supplies control logic; requires ≥1µF ceramic cap to AGND placed adjacent to pin for stability
6 AGND	Analog ground	Reference for FB, EN, PG; must be routed separately from PGND and tied at single point near IC
7 FB	Feedback input	Senses output via resistor divider; 0.8V threshold enables accurate regulation of adjustable or fixed-output versions
8 PG	Power good indicator	Open-drain signal asserts high when V_OUT is within ±5.5% of nominal - used for system power sequencing and fault detection
9 EN	Enable control	Logic-level input (1.02V rising threshold); no internal pull-up - must be actively driven to avoid floating state
12 SW	Switch node	Connection point between HS-FET source and LS-FET drain; high di/dt node requiring tight layout and minimal trace area

Key Features

Feature	Design Value
42V load dump survival	Enables direct connection to automotive battery without external TVS, reducing BOM count and board space
Low-dropout (LOD) mode	Maintains regulation down to VIN = VOUT + 0.3V - critical for engine start-up when battery dips to 3.1V
Frequency spread spectrum (FSS)	±10% modulation at 15kHz - lowers peak EMI amplitude to meet CISPR25 Class 5 radiated/conducted limits
Hiccup over-current protection	Auto-retry current limiting - prevents thermal runaway during short-circuit events while preserving downstream components
Wettable flank QFN	Enables reliable solder joint inspection via AOI - required for automotive process validation and zero-defect manufacturing

Applications

Automotive Infotainment

Instrument Clusters

Use Scenario: Powering SoC core rails and display interface ICs in head units with variable battery input and strict EMI limits.

IC Role / Device Role / Timing Role: Primary 5V or 3.3V buck regulator supplying processor I/O, audio codecs, and touch controllers.

Use Value: 42V load dump tolerance eliminates need for upstream TVS; CISPR25 Class 5 compliance avoids costly shielding or filter redesign.

Use Scenario: Generating stable 3.3V rail for digital gauges and HUD controllers exposed to cold-crank and vibration.

IC Role / Device Role / Timing Role: Always-on power stage supporting wake-on-LIN functionality with sub-20μA sleep current.

Use Value: 3.1V cold-crank support ensures uninterrupted operation during engine cranking; wettable flanks ensure solder joint reliability in high-vibration environments.

ADAS Camera Modules

Automotive Telematics

Use Scenario: Supplying image sensor and ISP in rear-view or surround-view cameras mounted near engine bay.

IC Role / Device Role / Timing Role: Compact 0.5A step-down converter handling wide input swings and thermal stress.

Use Value: 150°C max junction temperature rating allows placement near heat sources; 65ns t_{ON_MIN} supports high-frequency PWM dimming sync.

Use Scenario: Powering LTE/V2X modems and GNSS receivers in telematics control units with long-term battery backup.

IC Role / Device Role / Timing Role: Low-quiescent-current DC-DC stage enabling >1-year battery hold-up in disconnected state.

Use Value: 1μA shutdown current minimizes parasitic drain; AEC-Q100 Grade 1 qualification guarantees lifetime reliability in 15-year vehicle deployments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4320GLE-AEC1	Same silicon, larger QFN-12 (3mm×4mm) package with higher thermal dissipation (3.6W vs. 3.5W)	Better suited for higher ambient temperatures or sustained 0.5A loads where PCB copper area is limited	Select GLE variant when θ_JA margin is <5°C or case temperature rise exceeds 25°C at full load
TI LM61480-Q1	0.8A rated, 3.3V–36V input, but higher 12μA shutdown current and no wettable flanks	Targets higher-current ADAS ECUs; lacks AEC-Q100 Grade 1 extended temperature validation beyond 125°C	Choose LM61480-Q1 only if output current >0.55A is required and 150°C operation is not mandated

Compared with MPQ4320GLE-AEC1, the GDE variant offers superior board-area efficiency for space-constrained modules; versus LM61480-Q1, it trades peak current capability for lower I_Q, guaranteed 150°C operation, and manufacturable wettable flanks - making it optimal for compact, thermally constrained automotive subsystems.

Availability

MPQ4320GDE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, ADAS camera modules, and telematics systems requiring stable component supply across extended temperature and qualification lifecycles.

Supply support for MPQ4320GDE-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 power management ICs for automotive, industrial, and computing markets.

The MPQ4320 product line targets AEC-Q100-compliant DC-DC conversion in harsh automotive environments, emphasizing load-dump resilience, ultra-low quiescent current, and EMI-hardened design for safety-critical subsystems.

FAQ

What is the minimum input voltage required to start up the MPQ4320GDE-AEC1-P?

The device requires a minimum VIN of 3.9V to initiate startup, as defined by its UVLO rising threshold. Once operational, it sustains regulation down to 3.1V - essential for automotive cold-crank scenarios where battery voltage dips during engine cranking.

Does MPQ4320GDE-AEC1-P support adjustable output voltage?

Yes - the device supports both fixed-output versions (1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, 5V) and adjustable configurations. For adjustable use, connect FB to the center tap of an external resistor divider; the internal 0.8V reference enables VOUT = 0.8V × (1 + R1/R2).

How is EMI performance validated for this part?

MPQ4320GDE-AEC1-P meets CISPR25 Class 5 limits for both conducted and radiated emissions (peak and average) when used with the recommended EMI filter and PCB layout from the datasheet's Figure 16. Spread-spectrum modulation and symmetric VIN routing are integral to achieving compliance.

Can the PG pin be left unconnected if not used?

No - the PG pin must not be floated. If unused, it should be left open (not tied to any voltage), as it is an open-drain output with no internal pull-up. Connecting it to a pull-up resistor is only required when actively monitoring power-good status.

What thermal metrics define safe operation in a 2-layer PCB design?

On a standard 2-layer board (1oz copper), the QFN-12 (2mm×3mm) package achieves θ_JA ≈ 85°C/W. With 0.5A load and 12V input, power dissipation is ~0.3W; resulting junction rise is ~25°C above ambient - well within the 150°C limit if ambient stays ≤125°C.

Is there a difference between MPQ4320GDE-AEC1 and MPQ4320GDE-AEC1-P?

Yes - the "-P" suffix denotes tape-and-reel packaging (per MPS ordering guide). Electrically and thermally identical, the "-P" version is optimized for automated SMT assembly, while the base part number refers to the bare die/package without packaging designation.

How does frequency foldback improve startup reliability?

During startup, frequency foldback reduces f_SW under heavy load or low VIN, preventing inductor current runaway by extending off-time. This avoids premature current-limit triggering and ensures controlled soft-start into capacitive loads typical in automotive modules.

MPQ4320GDE-AEC1-P 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:: 500mA

Frequency - Switching:: 350kHz ~ 1.8MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 12-QFN (2x3)

MPQ4320GDE-AEC1-P FAQ

1.How can I place an order for MPQ4320GDE-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4320GDE-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 MPQ4320GDE-AEC1-P reliable?

The price and inventory of MPQ4320GDE-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 MPQ4320GDE-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ4320GDE-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4320GDE-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4320GDE-AEC1-P?

MPQ4320GDE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4320GDE-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 MPQ4320GDE-AEC1-P?

For technical support, including MPQ4320GDE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4320GDE-AEC1-P requirements.

6.How does Aetrix verify that MPQ4320GDE-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ4320GDE-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 MPQ4320GDE-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ4320GDE-AEC1-P?

All MPQ4320GDE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4320GDE-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 MPQ4320GDE-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ4320GDE-AEC1-P:

1.Submit a request within 90 days.

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

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