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

Monolithic Power Systems Inc. MPQ2179GQHE-AEC1-Z

Name: MPQ2179GQHE-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ2179GQHE-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2179GQHE-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-VFDFN

Datasheet:: MPQ2179GQHE-AEC1-Z.pdf

Description:: IC REG BUCK ADJ 3A 8QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ2179GQHE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 3A peak output current from a 2.5V–5.5V input, with 2.4MHz fixed switching frequency, 0.6V adjustable output voltage, and integrated 65mΩ/35mΩ power MOSFETs. It serves as a primary voltage regulator in automotive infotainment, clusters, and telematics systems requiring high efficiency and compact footprint.

For engineers reviewing the MPQ2179GQHE-AEC1-Z datasheet, MPQ2179GQHE-AEC1-Z pinout, MPQ2179GQHE-AEC1-Z application, or MPQ2179GQHE-AEC1-Z equivalent, key selection criteria include its COT control architecture for fast transient response, PG and SS pins for system sequencing and startup control, AEC-Q100 qualification for automotive reliability, and QFN-8 (1.5mm×2mm) wettable flank package for automated optical inspection.

Technical Context

The MPQ2179GQHE-AEC1-Z employs constant-on-time (COT) control with input voltage feed-forward to maintain stable 2.4MHz switching across input and load variations. Its internal high-side P-channel (65mΩ) and low-side N-channel (35mΩ) MOSFETs enable 100% duty-cycle operation in dropout and support forced continuous conduction mode (FCCM) to reduce output ripple.

Fault management includes cycle-by-cycle peak/valley current limiting (5A HS-FET / 3.5A LS-FET), hiccup-mode short-circuit protection, output over-voltage protection (115% V_REF trip), and thermal shutdown at 170°C. The open-drain PG pin asserts after soft-start when FB reaches 90% of 0.6V reference and deasserts at 85%, enabling precise power-rail monitoring.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 5.5V - supports direct connection to automotive 3.3V/5V rails and battery-supplied systems with brownout margin.
Peak Output Current	3A - delivers sufficient headroom for burst-mode loads in camera modules and infotainment processors.
Switching Frequency	2.4MHz - enables use of sub-2mm inductors and minimizes EMI filtering requirements in space-constrained PCB layouts.
Feedback Accuracy	±1% at 25°C - ensures tight output regulation (±12mV at 1.2V) critical for sensitive SoC core supplies.
Internal MOSFET R_DS(ON)	65mΩ (HS) / 35mΩ (LS) - reduces conduction loss and thermal rise under full 3A load at ambient temperature.
Soft-Start Control	External capacitor-based (≥1nF) - provides programmable slew rate to prevent inrush current and overshoot during cold start.
Power Good Threshold	90% rising / 85% falling of 0.6V reference - delivers deterministic sequencing window for downstream logic and microcontrollers.

Pinout & Package

MPQ2179GQHE-AEC1-Z is housed in a QFN-8 (1.5mm × 2mm) wettable flank package with exposed thermal pad, optimized for automotive reflow profiles and AOI-compatible solder joint inspection.

Pin/Terminal	Circuit Role	Design Meaning
1 - PG	Open-drain power-good indicator	Pulled high via external resistor when V_FB ≥ 90% of 0.6V; pulled low if V_FB drops below 85% - enables fault-aware system boot and reset coordination.
2 - VIN	Main input supply	Accepts 2.5V–5.5V; requires local ceramic decoupling to suppress high-frequency switching noise and rail collapse.
3 - SW	Switch node	Drain of internal P-channel MOSFET; connects directly to inductor - must be routed with minimal loop area to limit EMI and voltage spikes.
4 - GND	Power and signal ground	Common return for all internal circuits and external components; tied to thermal pad for optimal heat dissipation.
5 - EN	Enable control input	Digital on/off control with 1.2V rising / 0.4V falling thresholds; internal 2MΩ pull-down allows default-disable operation.
6 - SS	Soft-start timing node	Sinks 3µA current; external capacitor sets controlled V_OUT ramp time - prevents inrush and stabilizes startup under light/no-load conditions.
7 - OUT	Regulated output rail	High-current output path to load; requires low-ESR bulk capacitance to minimize ripple and support transient current demands.
8 - FB	Voltage feedback input	Compares divided output voltage against internal 0.6V reference; resistor divider ratio sets final regulated V_OUT (e.g., 1.2V = 100kΩ/100kΩ).

Key Features

Feature	Design Value
Constant-On-Time (COT) Control	Delivers <5µs load transient response without external compensation, simplifying design for dynamic automotive loads.
AEC-Q100 Grade 1 Qualification	Rated for -40°C to +125°C junction operation - validated for engine bay and dashboard-mounted applications with extended lifetime reliability.
Output Discharge Function	Internal discharge MOSFET activates during shutdown - rapidly bleeds stored energy from output capacitors to meet automotive safety and sequencing requirements.
Wettable Flank QFN Package	Side-wettable leads enable automated optical inspection of solder joints - critical for zero-defect manufacturing in automotive electronics.
Forced Continuous Conduction Mode (FCCM)	Maintains fixed 2.4MHz switching down to zero load - eliminates audible noise and ensures consistent EMI profile across operating range.

Applications

Automotive Infotainment

Camera Modules

Use Scenario: Powering display processors and audio DSPs in head-unit systems with variable load profiles and strict EMC limits.

IC Role / Device Role / Timing Role: Primary buck regulator supplying 1.2V/1.8V core and I/O rails with PG signaling for safe boot sequence coordination.

Use Value: 2.4MHz operation allows use of 1µH shielded inductors under 2mm height, reducing board area by >30% vs. 500kHz alternatives.

Use Scenario: Supplying image sensor and ISP in ADAS front/rear cameras where rapid wake-up and low-noise operation are mandatory.

IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with FCCM mode eliminating low-load switching frequency variation and associated noise.

Use Value: ±1% FB accuracy ensures stable pixel clock generation and analog front-end biasing, minimizing image artifacts.

Automotive Clusters

Key Fobs

Use Scenario: Delivering regulated 3.3V rail to digital instrumentation cluster MCUs with frequent deep-sleep/wake cycles.

IC Role / Device Role / Timing Role: Always-on buck converter supporting ultra-low quiescent current (650µA typ.) and fast EN-controlled wake-up.

Use Value: Output discharge function clears residual voltage within 10ms of shutdown - meeting ISO 16750-2 power-off timing compliance.

Use Scenario: Regulating battery voltage (2.5V–4.2V Li-ion) to 1.8V/3.3V for RF transceivers and secure microcontrollers in passive entry systems.

IC Role / Device Role / Timing Role: Compact, low-I_Q DC/DC with EN pin enabling MCU-controlled power gating during standby.

Use Value: QFN-8 (1.5mm×2mm) footprint saves >40% PCB area vs. comparable SOIC-8 solutions - critical for miniaturized fob designs.

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
TPS62840DLCR	Lower I_Q (300nA), 1.8V–5.5V input, 2A max, no PG or SS pin	Lacks power-good signaling and external soft-start - unsuitable for sequenced automotive subsystems requiring fault reporting.	Select only for ultra-low-power battery applications where sequencing and diagnostics are not required.
LM61480QRNRRQ1	4.5V–36V input, 8A output, 2.1MHz, integrated compensation, no wettable flank	Higher voltage/current rating and larger 3mm×3mm QFN - over-specified for 5.5V automotive domains and incompatible with AOI inspection.	Prefer for 12V/24V systems; avoid for 3.3V/5V rail conversion due to unnecessary complexity and footprint penalty.

Compared with TPS62840DLCR and LM61480QRNRRQ1, MPQ2179GQHE-AEC1-Z uniquely balances AEC-Q100 Grade 1 compliance, PG/SS functionality, wettable flank packaging, and 2.4MHz operation in a 1.5mm×2mm footprint - making it the only fit for space- and reliability-constrained 5V-domain automotive modules.

Availability

MPQ2179GQHE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, camera modules, and instrument clusters requiring stable component supply with full AEC-Q100 traceability and long-term production continuity.

Supply support for MPQ2179GQHE-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, and global manufacturing partnerships.

The MPQ2179 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for ASIL-B compatible subsystems in infotainment, ADAS, and body electronics - emphasizing small size, high efficiency, and robust fault handling under harsh environmental conditions.

FAQ

What is the minimum recommended soft-start capacitor value for MPQ2179GQHE-AEC1-Z?

The datasheet specifies a minimum external soft-start capacitor of 1nF. Using this value yields a typical soft-start time of ~200ms (t_SS = 0.6V / 3µA × C_SS). Larger capacitors extend ramp time proportionally and are recommended for systems sensitive to inrush current or requiring precise power-rail sequencing windows.

Does MPQ2179GQHE-AEC1-Z support 100% duty-cycle operation, and under what conditions?

Yes - the device supports true 100% duty cycle when the input voltage approaches the output voltage (dropout condition). This occurs when V_IN ≤ V_OUT + (I_LOAD × R_{DS(ON)_P}), enabling uninterrupted regulation during brownout events common in automotive stop-start systems.

How does the power-good (PG) pin behave during thermal shutdown?

During thermal shutdown, the controller halts switching but maintains regulation feedback. If V_FB remains ≥90% of 0.6V, PG stays asserted; however, if thermal foldback causes V_OUT sag below regulation, PG deasserts within 80µs. PG reasserts only after full recovery and successful soft-start completion post-shutdown.

Can MPQ2179GQHE-AEC1-Z operate with a 2.5V input and 1.2V output at 3A load?

Yes - the device delivers 3A peak output at 2.5V input and 1.2V output, achieving ~85% efficiency per typical performance curves. However, switching frequency scales down below 2.4MHz under heavy load at low VIN due to minimum off-time constraints; this is expected behavior and does not affect regulation stability.

Is the QFN-8 (1.5mm×2mm) package of MPQ2179GQHE-AEC1-Z RoHS and REACH compliant?

Yes - MPQ2179GQHE-AEC1-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. MPS confirms green status on its official quality assurance portal, with full material declarations available upon request.

What failure modes trigger hiccup-mode short-circuit protection?

Hiccup mode activates when inductor current exceeds the HS-FET peak limit (5A typ.) and persists beyond the LS-FET valley recovery threshold (3.5A typ.), indicating sustained overload or hard short. The device disables switching, discharges the SS capacitor, and attempts restart after full SS discharge - repeating until fault removal.

How is output over-voltage protection (OVP) implemented, and what is its trip threshold?

OVP monitors the FB pin: if V_FB rises above 115% of the 0.6V internal reference (i.e., 690mV), the controller enters dynamic regulation - forcing the LS-FET on to discharge the output until V_FB falls below 105% (630mV). This protects downstream 1.2V/1.8V logic from destructive overvoltage events.

MPQ2179GQHE-AEC1-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 8-VFDFN

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):: 2.5V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 5V

Current - Output:: 3A

Frequency - Switching:: 2.4MHz

Synchronous Rectifier:: Yes

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 8-QFN (2x1.5)

MPQ2179GQHE-AEC1-Z FAQ

1.How can I place an order for MPQ2179GQHE-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2179GQHE-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 MPQ2179GQHE-AEC1-Z reliable?

The price and inventory of MPQ2179GQHE-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 MPQ2179GQHE-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ2179GQHE-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2179GQHE-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2179GQHE-AEC1-Z?

MPQ2179GQHE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2179GQHE-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 MPQ2179GQHE-AEC1-Z?

For technical support, including MPQ2179GQHE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2179GQHE-AEC1-Z requirements.

6.How does Aetrix verify that MPQ2179GQHE-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ2179GQHE-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 MPQ2179GQHE-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ2179GQHE-AEC1-Z?

All MPQ2179GQHE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2179GQHE-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 MPQ2179GQHE-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ2179GQHE-AEC1-Z:

1.Submit a request within 90 days.

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

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