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

Monolithic Power Systems Inc. MPQ4317GRE-AEC1-P

Name: MPQ4317GRE-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ4317GRE-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4317GRE-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 20-PowerVFQFN

Datasheet:: MPQ4317GRE-AEC1-P.pdf

Description:: IC REG BUCK ADJ 7A 20QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ4317GRE-AEC1-P from Monolithic Power Systems is a 45V, 7A AEC-Q100 Grade 1 synchronous step-down converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, frequency spread spectrum (FSS), and configurable 350–1000kHz switching frequency. It delivers high efficiency across load ranges via light-load frequency foldback and supports automotive cold-crank with low-dropout mode. Used in ADAS power rails requiring robust EMI control and battery-backed operation.

For engineers reviewing the MPQ4317GRE-AEC1-P datasheet, MPQ4317GRE-AEC1-P pinout, MPQ4317GRE-AEC1-P application, or MPQ4317GRE-AEC1-P equivalent, key selection criteria include its 1.7μA shutdown current, AAM/FCCM mode selectability, ±2% output voltage accuracy at 5V/3.3V fixed options, QFN-20 wettable flank package, and CISPR25 Class 5 radiated/conducted EMI compliance.

Technical Context

This buck regulator employs current-mode control with internal compensation, enabling fast transient response for dynamic automotive loads. Its dual-mode operation-Advanced Asynchronous Modulation (AAM) for ultra-low quiescent current (18μA sleep) and Forced Continuous Conduction Mode (FCCM) for ripple-sensitive applications-is selected via the MODE pin.

The device integrates frequency synchronization (SYNCIN/SYNCO), external soft-start (SS), and programmable switching frequency (FREQ pin with resistor-to-ground). Thermal shutdown (170°C) and hiccup-mode over-current protection (10–16A HS limit) ensure fault resilience in harsh environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.3V to 45V - supports full automotive battery range including cold-crank (4.5V) and load-dump (40V+).
Output Current	7A continuous - enables single-chip power supply for infotainment SoCs or radar MMICs without external boost stages.
Quiescent Current	1.7μA shutdown / 18μA sleep - extends battery life in always-on vehicle modules like telematics or gateway ECUs.
Switching Frequency	350–1000kHz configurable - allows EMI optimization and inductor size trade-offs; supports external sync up to 1MHz.
Output Accuracy	±2% at 5V or 3.3V - ensures stable core voltage for microcontrollers and sensors under temperature and line/load variation.
FSS & EMI Performance	Frequency Spread Spectrum enabled - reduces peak radiated emissions to meet CISPR25 Class 5 limits without added filtering.
Thermal Protection	170°C shutdown with 20°C hysteresis - prevents thermal runaway during sustained overload or poor PCB heatsinking.

Pinout & Package

MPQ4317GRE-AEC1-P is housed in a wettable flank QFN-20 (4mm × 4mm) package, optimized for automated optical inspection (AOI) and enhanced solder joint reliability in automotive production.

Pin/Terminal	Circuit Role	Design Meaning
1 MODE	Mode selection	High = FCCM (low-noise); Low = AAM (ultra-low IQ); floating prohibited.
2 SYNCIN	External clock input	Accepts 350–1000kHz sync signal; requires ≤51kΩ pull-down if unused to avoid floating.
3,12 VIN	Main input supply	Power source for control circuitry and HS-FET; requires local ceramic decoupling.
4,5,10,11 PGND	Power ground	Low-impedance return path for high di/dt switch currents; separate from AGND.
6 BST	Bootstrap supply	Drives HS-FET gate; requires ceramic capacitor between BST and SW.
7,8 SW	Switch node	Connection point of internal HS/LS FETs; critical for layout to minimize ringing and EMI.
9 EN	Enable control	Active-high (≥1V); 0.19V hysteresis prevents chatter during slow-rising supplies.
13 SYNCO	Synchronized clock output	180° out-of-phase with internal oscillator; floats when unused.
14 PG	Power good indicator	Open-drain output active when VOUT is 95–105% of nominal; 35μs delay ensures stability.
15 NC	No connect	Must be left floating; no internal connection.
16 VCC	Bias supply	Internal 4.9V LDO output; requires local 1μF ceramic decoupling to AGND.
17 AGND	Analog ground	Reference for FB, SS, MODE; must be star-connected to PGND at single point.
18 FB	Feedback input	0.815V reference threshold; for adjustable versions only; fixed versions tie directly to VOUT.
19 SS	Soft-start timing	13μA current source charges external capacitor; sets inrush current ramp rate.
20 FREQ	Frequency programming	Resistor-to-ground sets fSW per curve on datasheet page 15; enables precise EMI tuning.

Key Features

Feature	Design Value
Wettable flank QFN-20	Enables automated solder-joint inspection for zero-defect automotive manufacturing.
AEC-Q100 Grade 1 qualification	Rated for -40°C to +125°C junction temperature - validated for engine bay and ADAS sensor modules.
Frequency spread spectrum (FSS)	Reduces peak conducted/radiated EMI by >10dB, easing CISPR25 Class 5 compliance without extra filters.
Low-dropout mode	Maintains regulation down to VIN = VOUT + 0.5V - sustains operation during 4.5V cold-crank events.
Out-of-phase SYNCO output	Allows interleaving with secondary converters to halve input/output ripple and reduce bulk capacitance.

Applications

Automotive Infotainment

ADAS Radar Power Supply

Use Scenario: Powering SoC, display, and audio subsystems in head units with variable load profiles and strict EMI limits.

IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter delivering 7A peak current with FSS-enabled low-noise operation.

Use Value: Eliminates need for post-regulator LDOs due to ±2% accuracy and <0.1% load regulation, reducing BOM count and board area.

Use Scenario: Supplying 5V to 77GHz radar transceivers requiring clean, stable voltage under vibration and wide temperature swings.

IC Role / Device Role / Timing Role: High-efficiency, low-EMI DC/DC stage upstream of RF power amplifiers and ADCs.

Use Value: AAM mode cuts sleep current to 18μA, extending module standby time; FCCM mode ensures <20mVpp output ripple at full load.

Instrument Cluster Display

Automotive Gateway ECU

Use Scenario: Driving TFT-LCD backlights and MCU cores in digital dashboards exposed to rapid VIN transients.

IC Role / Device Role / Timing Role: Main 3.3V rail generator with cold-crank support and fast transient recovery (<10μs).

Use Value: Low-dropout mode maintains 3.3V output down to 4.5V VIN, preventing display blackouts during engine start.

Use Scenario: Providing isolated 5V/3.3V rails for CAN FD, Ethernet AVB, and microcontroller domains in zonal architectures.

IC Role / Device Role / Timing Role: Central power management IC with SYNCIN capability for synchronized multi-rail sequencing.

Use Value: SYNCO output enables phase-shifted operation with companion converters, cutting input capacitor RMS current by 30%.

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
MPQ4316GRE-AEC1-P	6A output rating; identical pinout, package, and feature set except lower current capability.	Suitable where peak load is ≤6A; same thermal footprint and layout reuse possible.	Select when system margin allows 1A derating and cost sensitivity favors lower-rated variant.
TPS54560QDGQRQ1	45V, 5A, non-FSS; uses external compensation; no wettable flank; higher 18μA IQ in sleep mode.	Lacks CISPR25 Class 5 EMI certification; requires additional filter components for automotive EMC.	Choose only if existing TI design ecosystem mandates compatibility and EMI filtering is already implemented.

Compared with MPQ4316GRE-AEC1-P, the MPQ4317GRE-AEC1-P provides 1A higher output current without layout change; versus TPS54560QDGQRQ1, it delivers certified low-EMI performance and wettable flank AOI capability essential for new automotive designs.

Availability

MPQ4317GRE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS radar modules, and instrument cluster displays requiring stable component supply with AEC-Q100 traceability and long-term production support.

Supply support for MPQ4317GRE-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, with over two decades of innovation in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ4317 belongs to MPS's automotive-grade synchronous buck converter product line, designed specifically for demanding vehicle subsystems requiring AEC-Q100 qualification, ultra-low quiescent current, and certified EMI performance.

FAQ

What is the minimum input voltage required for regulation in low-dropout mode?

The MPQ4317GRE-AEC1-P maintains regulation down to VIN = VOUT + 0.5V. For a 5V output, this means stable operation begins at 5.5V input; for 3.3V output, regulation holds down to 3.8V. This enables uninterrupted function during automotive cold-crank events where battery voltage dips to 4.5V.

How does the Frequency Spread Spectrum (FSS) feature reduce EMI?

FSS modulates the switching frequency around a center value (e.g., ±10% of 470kHz), spreading energy across a wider bandwidth and lowering peak spectral amplitude. This reduces both conducted and radiated emissions, helping the MPQ4317GRE-AEC1-P meet CISPR25 Class 5 limits without adding ferrite beads or common-mode chokes.

Can the MPQ4317GRE-AEC1-P be used with fixed 3.3V or 5V outputs without external feedback resistors?

Yes. The MPQ4317GRE-AEC1-P is the base part number for the adjustable version. Fixed-output variants are MPQ4317GRE-33-AEC1-P (3.3V) and MPQ4317GRE-5-AEC1-P (5V), which internally set the feedback ratio. For those parts, the FB pin connects directly to VOUT - no external resistor divider is needed.

What is the purpose of the wettable flank package, and how does it benefit automotive manufacturing?

The wettable flank QFN-20 exposes copper along the vertical side walls of the package. During reflow, solder wets these flanks, enabling automated optical inspection (AOI) to verify solder joint integrity - a critical requirement for zero-defect quality standards in automotive electronics production.

How does the MODE pin affect efficiency and noise performance?

When MODE is pulled low, the IC enters Advanced Asynchronous Modulation (AAM), skipping pulses under light load to achieve 18μA quiescent current and minimal no-load power draw. When pulled high, it forces Continuous Conduction Mode (FCCM), eliminating low-frequency beat notes and ensuring constant switching frequency - ideal for noise-sensitive analog circuits.

Is thermal shutdown reset automatically after cooling?

Yes. The MPQ4317GRE-AEC1-P features thermal shutdown at 170°C with 20°C hysteresis. Once junction temperature falls below 150°C, the device automatically resumes normal operation without requiring an EN toggle or power cycle - ensuring robust fault recovery in thermally constrained enclosures.

What is the maximum recommended PCB copper layer count for thermal performance?

For optimal thermal performance, the MPQ4317GRE-AEC1-P evaluation board (EVQ4317-R-00A) uses a 4-layer PCB with 2oz copper. Thermal resistance θJA is specified as 23°C/W on this board. Using fewer layers or thinner copper increases θJA, potentially limiting max continuous output current in high-ambient environments.

MPQ4317GRE-AEC1-P 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:: 7A

Frequency - Switching:: 350kHz ~ 1MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount, Wettable Flank

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

MPQ4317GRE-AEC1-P FAQ

1.How can I place an order for MPQ4317GRE-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4317GRE-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 MPQ4317GRE-AEC1-P reliable?

The price and inventory of MPQ4317GRE-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 MPQ4317GRE-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ4317GRE-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4317GRE-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4317GRE-AEC1-P?

MPQ4317GRE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4317GRE-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 MPQ4317GRE-AEC1-P?

For technical support, including MPQ4317GRE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4317GRE-AEC1-P requirements.

6.How does Aetrix verify that MPQ4317GRE-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ4317GRE-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 MPQ4317GRE-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ4317GRE-AEC1-P?

All MPQ4317GRE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4317GRE-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 MPQ4317GRE-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ4317GRE-AEC1-P:

1.Submit a request within 90 days.

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

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