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. MPQ4320CGDE-AEC1-Z

Name: MPQ4320CGDE-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4320CGDE-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPQ4320CGDE-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-PowerVFQFN

Datasheet:: MPQ4320CGDE-AEC1-Z.pdf

Description:: IC REG BUCK ADJ 500MA 12QFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,000

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

Product details

Overview

MPQ4320CGDE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down converter designed for automotive power rails. It delivers up to 0.5A output current with 3.3V–36V input range, 42V load dump tolerance, 1μA shutdown current, and configurable switching frequency (350kHz–2.5MHz). It operates across –40°C to +150°C junction temperature and integrates 70mΩ HS-FET and 50mΩ LS-FET in a QFN-12 (2mm×3mm) wettable flank package.

For engineers reviewing the MPQ4320CGDE-AEC1-Z datasheet, MPQ4320CGDE-AEC1-Z pinout, MPQ4320CGDE-AEC1-Z application, or MPQ4320CGDE-AEC1-Z equivalent, key selection criteria include cold-crank support (3.1V min VIN), power-good accuracy (±5.5% VOUT window), frequency foldback at startup, LDO mode for low-VIN operation, and CISPR25 Class 5 EMI compliance with FSS modulation.

Technical Context

The MPQ4320CGDE-AEC1-Z employs peak current mode control with integrated high-side and low-side MOSFETs, enabling efficient regulation under transient load and wide input conditions. Its programmable frequency via external resistor (FREQ pin) supports EMI optimization across 350kHz–2.5MHz, while frequency spread spectrum (FSS) reduces spectral peaks by ±10%.

Thermal management is enhanced by MeshConnect™ flip-chip packaging and dual VIN/PGND pins for low-inductance layout. The device enters low-dropout (LDO) mode during cold-crank events and uses hiccup-mode over-current protection with 0.8A–2A HS peak limit and 0.5A–1.5A LS valley limit.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 36V continuous; withstands 42V automotive load dump per ISO16750.
Output Current	Up to 0.5A continuous; supported by integrated 70mΩ HS-FET and 50mΩ LS-FET.
Switching Frequency	Configurable 350kHz–2.5MHz via external resistor; ±10% FSS modulation for CISPR25 Class 5 compliance.
Shutdown Current	1μA typical; enables long-term battery retention in always-on automotive modules.
Power Good Accuracy	Indicates VOUT within 94.5%–105.5% of nominal; ±1.5% hysteresis prevents chatter during transients.
Operating Temperature	–40°C to +150°C junction; AEC-Q100 Grade 1 qualified for under-hood deployment.
Minimum On/Off Time	65ns t_{ON_MIN}, 50ns t_{OFF_MIN}; enables stable operation at high VIN/VOUT ratios and high frequencies.

Pinout & Package

MPQ4320CGDE-AEC1-Z is housed in a QFN-12 (2mm × 3mm) package with wettable flanks for automated optical inspection (AOI) and enhanced thermal performance (θ_JA = 60°C/W on JESD51-7 board).

Pin/Terminal	Circuit Role	Design Meaning
1, 11 PGND	Power ground reference	Dual low-inductance ground paths for high-frequency return currents; must be connected to solid ground plane.
2, 10 VIN	Main input supply	Supplies internal control circuitry and gate drivers; two pins reduce IR drop and improve EMI; decouple each with local ceramic cap to PGND.
3 BOOT	High-side gate driver supply	Bootstrap capacitor between BOOT and SW provides gate drive voltage for HS-FET; critical for duty cycle >90% operation.
4 FREQ	Frequency configuration	Resistor-to-AGND sets f_SW; supports precise EMI tuning and avoids sensitive frequency bands.
5 VCC	Bias regulator output	Internal 5V regulator powers control logic; requires ≥1μF ceramic cap to AGND for stability.
6 AGND	Analog ground reference	Separate ground for feedback and sensing; must be star-connected to PGND at single point to avoid noise coupling.
7 FB	Feedback input	Monitors output voltage; connects directly to VOUT for fixed versions or to resistive divider for adjustable outputs (V_FB = 0.8V).
8 PG	Open-drain power good	Asserts high when VOUT is within ±5.5%; requires external pull-up; used for system sequencing and fault detection.
9 EN	Enable control	Active-high logic; 1.02V threshold ensures robust start-up; no internal pull-up required but must not float.
12 SW	Switch node	Drain of LS-FET and source of HS-FET; high dV/dt node requiring tight layout and minimal trace length to reduce EMI.

Key Features

Feature	Design Value
42V Load Dump Tolerance	Withstands ISO16750-2 pulse 5a without latch-up or degradation-enables direct connection to automotive battery rail.
Cold-Crank Support	Operates down to 3.1V VIN after startup and starts from 3.9V; maintains regulation during engine cranking.
Low-Dropout (LDO) Mode	Extends regulation into dropout region by modulating HS-FET conduction; sustains VOUT when VIN drops near VOUT.
Forced CCM Operation	Ensures continuous inductor current at light loads-reduces output ripple and improves transient response vs. DCM.
EMI-Optimized Layout	Symmetric VIN pinout, mesh-connected flip-chip die, and FSS reduce peak radiated emissions to meet CISPR25 Class 5.
Hiccup Over-Current Protection	Limits fault energy during short-circuit; auto-retries after thermal recovery-prevents thermal runaway without external circuitry.

Applications

Automotive Infotainment

Instrument Clusters

Use Scenario: Powering display backlight drivers and SoC I/O rails in head units exposed to battery transients.

IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying microcontroller, audio codec, and touch controller.

Use Value: 42V load dump tolerance eliminates need for upstream TVS; 1μA ISD extends parking-mode battery life.

Use Scenario: Supplying MCU, CAN transceiver, and TFT LCD bias in digital instrument panels.

IC Role / Device Role / Timing Role: Secondary buck stage delivering stable 3.3V from 12V battery, synchronized to cluster timing requirements.

Use Value: LDO mode maintains display brightness during cold-crank; PG signal validates rail integrity before boot.

ADAS Camera Modules

Automotive Telematics Control Units

Use Scenario: Providing clean 1.8V/2.5V for image sensor and ISP in rear-view or surround-view cameras.

IC Role / Device Role / Timing Role: Point-of-load regulator with low-noise operation and fast load-step response for pixel clock stability.

Use Value: 65ns t_{ON_MIN} enables high-frequency operation with small inductors; FSS minimizes EMI coupling into analog video path.

Use Scenario: Powering LTE modem, GNSS receiver, and secure MCU in vehicle connectivity gateways.

IC Role / Device Role / Timing Role: High-reliability DC-DC stage supporting always-on wake-up logic and cellular RF front-end sequencing.

Use Value: AEC-Q100 Grade 1 qualification ensures lifetime reliability; thermal shutdown protects against enclosure overheating.

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
MPQ4320CGLE-AEC1-Z	Same IC die, larger QFN-12 (3mm×4mm) package with lower θ_JA (50°C/W) and higher power dissipation (3.6W).	Better thermal performance in space-constrained but thermally demanding locations (e.g., near power amplifiers).	Select when PCB layout allows larger footprint and thermal rise must stay below 20°C at 0.5A full load.
TI LM61480-Q1	0.8A rated, 3.5V–36V input, 1.5μA ISD, but lacks FSS and fails CISPR25 Class 5 without external filters.	Higher current capability suits dual-rail systems; requires added EMI filtering for automotive EMC pass.	Choose only if output current >0.5A is mandatory and board area permits filter components.

Compared with MPQ4320CGDE-AEC1-Z, the CGLE variant offers superior thermal margin in compact layouts, while the LM61480-Q1 trades EMI simplicity for higher current-neither matches its combination of ultra-low ISD, integrated FSS, and wettable-flank AOI readiness.

Availability

MPQ4320CGDE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and ADAS camera modules requiring stable component supply across extended temperature and transient-voltage environments.

Supply support for MPQ4320CGDE-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 MPQ4320C product line targets AEC-Q100-compliant DC-DC conversion in harsh automotive environments, emphasizing load dump resilience, cold-crank operation, and EMI robustness without external complexity.

FAQ

What is the minimum input voltage required to start up the MPQ4320CGDE-AEC1-Z?

The device requires a minimum VIN of 3.9V to initiate startup, as defined by its UVLO rising threshold. Once running, it sustains regulation down to 3.1V VIN-critical for automotive cold-crank scenarios where battery voltage dips below 6V during engine cranking.

Does MPQ4320CGDE-AEC1-Z support adjustable output voltage?

Yes-it supports both fixed-output versions (1V, 1.8V, 2.5V, 3V, 3.3V, 3.8V, 5V) and adjustable configurations. For adjustable use, connect the FB pin to a resistive divider between VOUT and AGND; the internal reference is 0.8V with ±0.6% initial accuracy over temperature.

How does the frequency foldback feature protect the converter during startup?

During soft-start, frequency foldback reduces f_SW to prevent inductor current runaway when output capacitance is uncharged. This limits peak IL stress and avoids false OCP triggering, ensuring reliable ramp-up even with large output capacitors or heavy pre-biased loads.

Can the PG pin be left floating if not used in the system?

No-the PG pin must not be left floating. If unused, it should be disconnected (not tied high or low). The open-drain structure means floating PG may cause undefined logic states or leakage-induced noise; MPS recommends leaving it unconnected per datasheet guidance.

What is the purpose of the dual VIN and dual PGND pins?

Dual VIN and PGND pins minimize high-frequency loop inductance by providing parallel current paths for switching node transitions. This reduces voltage spikes on VIN, lowers EMI radiation, and improves stability-especially critical in automotive PCBs with constrained layer counts and high dv/dt demands.

Is the MPQ4320CGDE-AEC1-Z compliant with RoHS and halogen-free standards?

Yes-MPQ4320CGDE-AEC1-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status per its Quality Assurance documentation, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL 1) requirements.

How does the wettable flank package benefit manufacturing yield?

The wettable flank design enables automated optical inspection (AOI) of solder joint quality on the package perimeter. This significantly improves first-pass yield in reflow processes for automotive-grade assemblies, where zero-defect solder joints are mandated by IATF 16949.

MPQ4320CGDE-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:: 500mA

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 (2x3)

MPQ4320CGDE-AEC1-Z FAQ

1.How can I place an order for MPQ4320CGDE-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4320CGDE-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 MPQ4320CGDE-AEC1-Z reliable?

The price and inventory of MPQ4320CGDE-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 MPQ4320CGDE-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ4320CGDE-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4320CGDE-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4320CGDE-AEC1-Z?

MPQ4320CGDE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4320CGDE-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 MPQ4320CGDE-AEC1-Z?

For technical support, including MPQ4320CGDE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4320CGDE-AEC1-Z requirements.

6.How does Aetrix verify that MPQ4320CGDE-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4320CGDE-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 MPQ4320CGDE-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ4320CGDE-AEC1-Z?

All MPQ4320CGDE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4320CGDE-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 MPQ4320CGDE-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ4320CGDE-AEC1-Z:

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…