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. MPQ4314GRE-AEC1-Z

Name: MPQ4314GRE-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4314GRE-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MPQ4314GRE-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 20-PowerVFQFN

Datasheet:: MPQ4314GRE-AEC1-Z.pdf

Description:: IC REG BUCK ADJ 4A 20QFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,563

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

Product details

Overview

MPQ4314GRE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, delivering up to 4A output current across a 3.3V–45V input range. It features frequency spread spectrum (FSS), programmable 350–1000kHz switching, 1.7μA shutdown current, and power-good monitoring - optimized for automotive infotainment and ADAS power rails.

For engineers reviewing the MPQ4314GRE-AEC1-Z datasheet, MPQ4314GRE-AEC1-Z pinout, MPQ4314GRE-AEC1-Z application, or MPQ4314GRE-AEC1-Z equivalent, key selection criteria include cold-crank low-dropout mode, hiccup over-current protection, AAM/FCCM modulation control, and wettable-flank QFN-20 packaging for automotive-grade solder joint inspection.

Technical Context

The MPQ4314 employs current-mode control with internal compensation, enabling fast transient response and stable operation under wide VIN and load variations. Its dual-mode modulation (AAM for light-load efficiency, FCCM for fixed-frequency EMI control) and 100ns minimum on-time support high duty-cycle operation during automotive cold-crank events (VIN down to 3.3V).

Frequency synchronization capability allows phase-shifted multi-phase operation via SYNCO output (180° out-of-phase), while FSS reduces peak radiated emissions to meet CISPR25 Class 5 requirements. Thermal shutdown at 170°C with 20°C hysteresis ensures fault-tolerant operation in under-hood environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 45V - supports full automotive battery range including cold-crank (3.3V) and load-dump (45V) transients.
Output Current	4A continuous - sufficient for powering SoCs, displays, and radar modules in ADAS clusters.
Quiescent Current	1.7μA in shutdown - enables always-on systems without excessive battery drain.
Switching Frequency	350kHz to 1000kHz, programmable via resistor - allows EMI optimization and external clock synchronization.
MOSFET R_DS(on)	HS-FET: 48mΩ, LS-FET: 20mΩ - minimizes conduction loss and thermal rise at full load.
Power Good Threshold	95%–105% of V_FB (0.815V) - provides accurate ±5% output voltage monitoring for system sequencing.
Minimum On-Time	100ns - enables high step-down ratios (e.g., 45V→3.3V) without pulse-skipping instability.

Pinout & Package

MPQ4314GRE-AEC1-Z is housed in a wettable flank QFN-20 package (4mm × 4mm), supporting automated optical inspection (AOI) of solder joints per automotive manufacturing standards.

Pin/Terminal	Circuit Role	Design Meaning
1 MODE	Modulation select	High = FCCM (fixed frequency); Low = AAM (light-load efficiency); must be pulled, not floated.
2 SYNCIN	External clock input	Accepts 350–1000kHz sync signal; enables multi-converter phase alignment and EMI reduction.
3,12 VIN	Main input supply	Supplies control circuitry and HS-FET gate driver; requires local ceramic decoupling near pins.
4,5,10,11 PGND	Power ground return	Low-impedance path for high di/dt switch currents; separate from AGND to avoid noise coupling.
6 BST	Bootstrap supply	Drives HS-FET gate; requires ceramic capacitor (typically 0.1μF) between BST and SW.
7,8 SW	Switch node	Connects internal HS/LS FETs; high dv/dt node requiring minimized trace area and guard ring.
9 EN	Enable control	Active-high enable with 0.85V rising threshold; supports controlled power-up sequencing.
13 SYNCO	Synchronization output	180° out-of-phase clock output; used for interleaving multiple MPQ4314s to reduce input ripple.
14 PG	Power good indicator	Open-drain output; requires external pull-up; asserts high when VOUT is within ±5% of target.
15 NC	No connect	Internally unconnected; must remain floating per datasheet guidance.
16 VCC	Bias supply	Internal LDO output; powers gate drivers and logic; requires 1μF ceramic decoupling to PGND.
17 AGND	Analog ground	Reference for FB, SS, MODE; must be star-connected to PGND at single point to minimize noise.
18 FB	Feedback input	Monitors output via resistor divider; 0.815V reference enables precise regulation of adjustable outputs.
19 SS	Soft-start timing	Capacitor-to-ground sets startup ramp time; 13μA internal current source controls inrush limiting.
20 FREQ	Frequency programming	Resistor-to-ground selects fSW from 350–1000kHz; enables EMI tuning without changing layout.

Key Features

Feature	Design Value
Frequency Spread Spectrum (FSS)	Reduces peak conducted/radiated EMI by spreading energy across ~15kHz bandwidth - meets CISPR25 Class 5 without added filtering.
Low-Dropout Mode	Extends regulation down to VIN = VOUT + 0.5V - sustains 3.3V output during 4.2V cold-crank events in automotive systems.
Hiccup Over-Current Protection	Shuts down on sustained overload, then auto-retries after thermal recovery - prevents latch-up and enables self-healing under short-circuit faults.
Wettable Flank QFN-20	Side-wettable leads enable AOI verification of solder fillet integrity - required for AEC-Q100-compliant automotive PCB assembly.
Asynchronous Modulation (AAM)	Skips pulses at light loads to maintain >85% efficiency down to 1mA - extends battery life in always-on vehicle modules.

Applications

Automotive Infotainment

ADAS Camera Module

Use Scenario: Powering 12V-to-3.3V/5V rails for head-unit processors, touch controllers, and audio codecs in vehicles with wide battery variation.

IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic voltage with tight line/load regulation and low-noise PG signaling.

Use Value: 1.7μA shutdown current preserves battery during ignition-off; FSS avoids interference with AM/FM radio bands.

Use Scenario: Generating stable 3.3V for image sensors and ISP processors in forward-facing cameras exposed to under-hood temperature extremes.

IC Role / Device Role / Timing Role: High-reliability DC/DC converter with thermal shutdown and AEC-Q100 Grade 1 qualification for safety-critical vision systems.

Use Value: 170°C thermal shutdown with 20°C hysteresis prevents thermal runaway; wettable flank package ensures solder joint reliability at -40°C to +125°C.

Instrument Cluster Display

Automotive Telematics Unit

Use Scenario: Delivering 5V to TFT-LCD backlight drivers and microcontroller peripherals in digital dashboards subject to load-dump transients.

IC Role / Device Role / Timing Role: Input-robust step-down regulator with 45V absolute max rating and frequency foldback for safe start-up.

Use Value: 45V input rating withstands ISO 7637-2 Pulse 5a load-dump spikes; frequency foldback prevents inductor saturation during cold-crank.

Use Scenario: Providing isolated 3.3V for cellular modems and GNSS receivers in telematics control units requiring low standby power and EMI compliance.

IC Role / Device Role / Timing Role: Synchronized buck converter enabling multi-rail phase interleaving to reduce input capacitor stress.

Use Value: SYNCO output enables precise 180° phase shift with second MPQ4314 - cuts input ripple current by >70% versus single-phase operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4315GRE-AEC1-Z	5A rated output, identical pinout and feature set; higher R_DS(on) (42mΩ HS, 18mΩ LS) due to larger die.	Supports higher-current rails (e.g., radar SoC cores); requires revised thermal layout due to +25% power dissipation at full load.	Select when >4A continuous current is needed; verify θJA margin with 4-layer board and copper pour.
TPS54340QDGQRQ1	4.5A, 42V input, but no FSS, no wettable flank, and 18μA quiescent current in sleep mode.	Lacks CISPR25 Class 5 EMI certification out-of-box; requires external spread-spectrum IC or filter redesign.	Choose only if legacy TI ecosystem integration outweighs EMI certification and AOI requirements.

Compared with MPQ4314GRE-AEC1-Z, MPQ4315GRE-AEC1-Z offers headroom for future power scaling but increases thermal design complexity, while TPS54340QDGQRQ1 sacrifices automotive EMI compliance and manufacturability for vendor lock-in compatibility.

Availability

MPQ4314GRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, instrument cluster displays, and telematics units requiring stable component supply with AEC-Q100 Grade 1 assurance.

Supply support for MPQ4314GRE-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, with design centers in the US, China, and Taiwan.

The MPQ4314 belongs to MPS's automotive-qualified DC/DC converter family, engineered specifically for harsh automotive environments - emphasizing AEC-Q100 reliability, low EMI, cold-crank operation, and manufacturable packaging.

FAQ

What is the purpose of the MODE pin, and how should it be configured?

The MODE pin selects between Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM). Pull MODE high (≥1.8V) for FCCM - ideal for EMI-sensitive applications requiring fixed switching frequency. Pull MODE low (≤0.4V) for AAM - maximizes light-load efficiency by skipping pulses. The pin must never float; use a pull-up or pull-down resistor per the datasheet's recommended values.

Does MPQ4314GRE-AEC1-Z support output voltages other than 3.3V?

Yes - the base MPQ4314GRE-AEC1-Z is adjustable via external feedback resistors. Its 0.815V reference enables output voltages from 0.815V up to 0.95×VIN. Fixed-output variants like MPQ4314GRE-33-AEC1-Z are also available for 3.3V, but the -Z suffix part referenced here is the adjustable version, requiring R_UP/R_DOWN to set V_OUT.

How does the frequency spread spectrum (FSS) function impact EMC testing?

FSS modulates the switching frequency by ±6kHz around the nominal value, spreading spectral energy and reducing peak amplitudes in conducted and radiated emissions. Test data shows the MPQ4314 meets CISPR25 Class 5 limits without additional EMI filters when used with the recommended application circuit, including proper layout and input capacitors.

Can MPQ4314GRE-AEC1-Z operate safely during automotive cold-crank conditions?

Yes - it supports input voltages as low as 3.3V and enters low-dropout mode to maintain regulation when VIN approaches VOUT. At 3.3V input, it delivers regulated 3.3V output with >60% efficiency at 1A, and its 100ns minimum on-time prevents pulse-skipping instability - critical for engine-start sequences where battery voltage dips below 6V.

What is the significance of the "wettable flank" feature in the QFN-20 package?

Wettable flanks provide solderable side walls on the QFN leads, enabling automated optical inspection (AOI) of solder fillets during reflow. This is mandated for AEC-Q100-compliant automotive manufacturing to verify interconnect integrity - especially important for high-vibration, high-reliability applications where voided or insufficient solder joints could cause field failures.

Is external soft-start capacitor required, and how is its value calculated?

Yes - a capacitor from SS to GND sets soft-start time. The MPQ4314 sources a constant 13μA current into CSS, so t_SS ≈ (V_SS × C_SS) / 13μA, where V_SS is the SS pin trip voltage (~1.2V). For a 10ms ramp, use C_SS = (1.2V × 10ms) / 13μA ≈ 0.92μF - standard value is 1μF X7R ceramic placed close to the SS pin.

How does the power-good (PG) signal behave during overvoltage and undervoltage conditions?

PG is an open-drain output that pulls low when V_OUT falls below 93.5% or rises above 106.5% of the nominal value (e.g., <3.10V or >3.52V for 3.3V output). It asserts high when V_OUT is within 95–105% (3.14–3.47V), with 35μs delay for both rising and falling edges - providing clean sequencing signals for downstream processors and FPGAs.

MPQ4314GRE-AEC1-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 20-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):: 45V

Voltage - Output (Min/Fixed):: 0.815V

Voltage - Output (Max):: 42.75V

Current - Output:: 4A

Frequency - Switching:: 350kHz ~ 1MHz

Synchronous Rectifier:: Yes

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 20-QFN (4x4)

MPQ4314GRE-AEC1-Z FAQ

1.How can I place an order for MPQ4314GRE-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4314GRE-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 MPQ4314GRE-AEC1-Z reliable?

The price and inventory of MPQ4314GRE-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 MPQ4314GRE-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ4314GRE-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4314GRE-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4314GRE-AEC1-Z?

MPQ4314GRE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4314GRE-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 MPQ4314GRE-AEC1-Z?

For technical support, including MPQ4314GRE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4314GRE-AEC1-Z requirements.

6.How does Aetrix verify that MPQ4314GRE-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4314GRE-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 MPQ4314GRE-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ4314GRE-AEC1-Z?

All MPQ4314GRE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4314GRE-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 MPQ4314GRE-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ4314GRE-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…