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

Monolithic Power Systems Inc. MPQ2177GQHE-AEC1-Z

Name: MPQ2177GQHE-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ2177GQHE-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2177GQHE-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-VFDFN

Datasheet:: MPQ2177GQHE-AEC1-Z.pdf

Description:: IC REG BUCK ADJ 1A 8QFN

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Product details

Overview

MPQ2177GQHE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering 1A continuous output current across a 2.5V–5.5V input range, with 0.6V minimum adjustable output voltage, 2.4MHz switching frequency, and integrated power-good (PG) and soft-start (SS) functions. It targets automotive power rails for infotainment, camera modules, and clusters where compact size, thermal robustness, and functional safety compliance are critical.

For engineers reviewing the MPQ2177GQHE-AEC1-Z datasheet, MPQ2177GQHE-AEC1-Z pinout, MPQ2177GQHE-AEC1-Z application in automotive power sequencing, or MPQ2177GQHE-AEC1-Z equivalent for AEC-Q100-compliant 1A buck converters, this page provides verified electrical parameters, validated QFN-8 (1.5mm×2mm) package mapping, confirmed COT control behavior, and real-world fault-protection implementation details including hiccup-mode SCP and 100% duty-cycle operation.

Technical Context

The MPQ2177GQHE-AEC1-Z employs constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across 2.5V–5.5V input and full load range, eliminating external compensation while enabling fast transient response. Its internal 75mΩ P-channel and 45mΩ N-channel MOSFETs support forced continuous conduction mode (FCCM) and 100% duty cycle for low-dropout operation.

Power-good signaling uses an open-drain PG pin with 85%–90% VREF thresholds and 80μs delay; soft-start is externally programmable via SS pin with 3μA charge current and ≥1nF capacitor; output discharge activates automatically during shutdown with 150Ω internal path. Thermal shutdown triggers at 170°C with 20°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 5.5V - supports direct connection to automotive battery (cold-crank down to 2.5V) without pre-regulation.
Output Current	1A continuous - sufficient for powering SoCs, image sensors, and MCU cores in automotive telematics.
Switching Frequency	2.4MHz ±10% - enables use of small 2.2μH inductors and reduces EMI filter footprint.
Feedback Accuracy	±1% over -40°C to +150°C - ensures stable 1.2V/1.8V rail regulation under engine bay thermal stress.
Junction Temperature Range	-40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive deployment.
Power-Good Threshold	90% VREF rising / 85% VREF falling - provides precise, hysteresis-controlled system power sequencing signal.
Short-Circuit Protection	Hiccup mode with automatic recovery - limits average power dissipation during sustained fault without latch-off.

Pinout & Package

MPQ2177GQHE-AEC1-Z is housed in a wettable flank QFN-8 package (1.5mm × 2mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and thermal performance in space-constrained automotive PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 PG	Open-drain power-good indicator	Pulled high when VFB ≥ 90% of 0.6V reference; pulled low if VFB ≤ 85%; requires external 10kΩ–100kΩ pull-up to VIN or auxiliary supply.
2 VIN	Main input supply	Accepts 2.5V–5.5V; decoupling capacitor mandatory to suppress transients from automotive battery line.
3 SW	Switching node	Drain of internal P-channel high-side MOSFET; connects directly to inductor; high dv/dt node requiring tight layout.
4 GND	Power and signal ground	Common return for VIN, OUT, FB, SS, EN, and PG; must be low-impedance plane beneath exposed pad.
5 EN	Enable control	Digital input with 0.9V rising / 0.65V falling threshold; internal 2MΩ pull-down enables default-disable behavior.
6 SS	Soft-start timing	3μA current source charges external capacitor; t_SS = (C_SS × 0.6V) / 3μA; min 1nF prevents inrush current.
7 OUT	Regulated output	Delivers up to 1A; connects to output capacitor and load; internal discharge MOSFET activates on shutdown.
8 FB	Feedback input	Senses resistor divider output; compares to 0.6V internal reference; floating for fixed-output variants.

Key Features

Feature	Design Value
Integrated Power MOSFETs	75mΩ P-ch and 45mΩ N-ch switches eliminate external FETs and reduce BOM count by 4 components.
MeshConnect™ Flip-Chip Packaging	Reduces thermal resistance (θ_JA = 59°C/W on 4-layer board) and improves EMC by minimizing bond-wire inductance.
Constant-On-Time Control	Enables <10μs load transient response without loop compensation components; VIN feed-forward stabilizes f_SW.
Output Discharge	150Ω internal path discharges C_OUT during shutdown-critical for multi-rail systems requiring controlled power-down sequencing.
AEC-Q100 Grade 1 Qualification	Validated for -40°C to +150°C operation with 100% production test coverage on key parameters including R_DS(ON) and PG timing.

Applications

Automotive Infotainment

Camera Module Power

Use Scenario: Powering display controllers and audio DSPs in head-unit systems with variable battery voltage (6V–16V) and cold-crank events.

IC Role / Device Role / Timing Role: Primary 1.2V/1.8V core supply regulator with PG signaling for SoC reset coordination and EN-controlled power sequencing.

Use Value: 2.4MHz operation avoids AM radio band; FCCM ensures ripple stability across load; AEC-Q100 qualification guarantees reliability in 15-year vehicle lifecycle.

Use Scenario: Supplying image sensor and ISP in rear-view or ADAS cameras mounted near exhaust or engine compartments.

IC Role / Device Role / Timing Role: Compact 1A buck converter delivering regulated 1.2V/1.8V from 5V domain, with thermal shutdown at 170°C and hiccup-mode SCP for lens motor short circuits.

Use Value: QFN-8 (1.5mm×2mm) footprint fits behind small optics; -40°C to +150°C operation sustains functionality during thermal soak testing.

Automotive Cluster Display

Key Fob RF Transceiver Supply

Use Scenario: Generating clean 3.3V or 1.8V rails for TFT LCD drivers and microcontrollers in digital instrument clusters exposed to vibration and wide temperature swings.

IC Role / Device Role / Timing Role: Secondary regulator downstream of main PMIC, using PG to gate enable signals for backlight ICs and touch controllers.

Use Value: 1% FB accuracy maintains display contrast consistency; output discharge prevents ghosting during ignition cycling; soft-start eliminates display flicker at startup.

Use Scenario: Providing stable 1.8V supply to sub-GHz or BLE transceivers in wireless key fobs subject to battery voltage decay and ESD events.

IC Role / Device Role / Timing Role: Low-quiescent-current (650μA typ.) buck converter with EN pin enabling ultra-low-power sleep mode and rapid wake-up.

Use Value: Shutdown current <1μA extends coin-cell life; 2.4MHz switching allows ceramic capacitors only; HBM ±2000V rating withstands handling ESD.

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 IQ (300nA) but 0.6A max output; 1.8V–5.5V input; no integrated PG; requires external compensation.	Better for ultra-low-power always-on nodes (e.g., key fob standby), unsuitable for 1A cluster displays.	Select when battery life > output current; avoid if PG signaling or AEC-Q100 compliance is required.
LM61480QRTWRQ1	3.5A output, 2.5V–18V input, spread-spectrum EMI reduction; larger HTSSOP-16 package; higher BOM cost.	Targeted at higher-power ADAS ECUs; over-specified for 1A infotainment rails; adds complexity for simple point-of-load needs.	Select only when >1A or >5.5V input is needed; MPQ2177GQHE-AEC1-Z offers better size/cost fit for 1A automotive domains.

Compared with TPS62840DLCR and LM61480QRTWRQ1, MPQ2177GQHE-AEC1-Z uniquely balances AEC-Q100 Grade 1 qualification, 1A capability in 1.5mm×2mm QFN, integrated PG/SS, and 2.4MHz FCCM operation-making it optimal for cost-sensitive, space-constrained automotive subsystems requiring functional safety alignment without over-engineering.

Availability

MPQ2177GQHE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, camera modules, and digital instrument clusters requiring stable component supply with AEC-Q100 traceability and long-term production continuity.

Supply support for MPQ2177GQHE-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 focus on efficiency, integration, and automotive-grade reliability.

The MPQ2177 product line delivers compact, AEC-Q100-qualified DC/DC converters targeting next-generation automotive electronics where board space, thermal margin, and functional safety compliance are non-negotiable.

FAQ

What is the maximum allowable input voltage for MPQ2177GQHE-AEC1-Z?

The absolute maximum VIN is +6.5V per Absolute Maximum Ratings, but the device enters over-voltage protection (OVP) at 6.1V and ceases switching until VIN drops below 6.0V. For reliable operation, VIN must remain within the recommended 2.5V–5.5V range; exceeding 5.5V risks OVP activation and system instability.

Does MPQ2177GQHE-AEC1-Z support pre-biased start-up?

Yes. The MPQ2177GQHE-AEC1-Z supports pre-biased start-up: when EN is asserted, the controller begins switching even if VOUT already holds a valid voltage (e.g., from another rail). This prevents brown-out during hot-plug or multi-rail sequencing and works regardless of whether output discharge is enabled or blocked.

How is the soft-start time calculated for MPQ2177GQHE-AEC1-Z?

Soft-start time t_SS is calculated as t_SS = (C_SS × 0.6V) / I_SS, where C_SS is the external capacitor in nF and I_SS is the internal 3μA charge current. For example, a 4.7nF capacitor yields t_SS ≈ 0.94ms. Minimum C_SS is 1nF; values above 10nF may cause excessive start-up delay in time-critical systems.

What thermal performance can be expected on a standard 4-layer PCB?

On the EVQ2177-LE-00A evaluation board (2oz copper, 4-layer, 6.3cm×6.3cm), θ_JA is 59°C/W and θ_JC is 14°C/W. At 1A load and 5V input, typical power loss is ~150mW, resulting in ~9°C junction-to-ambient rise-well within the -40°C to +150°C operating range. Exposed pad soldering is mandatory for rated thermal performance.

Is the PG pin compatible with 3.3V logic systems?

Yes. The PG pin is open-drain and requires an external pull-up. When used with a 10kΩ–100kΩ resistor to 3.3V, PG asserts high at ≥2.97V (90% of 3.3V) and de-asserts low at ≤2.805V (85% of 3.3V), meeting standard 3.3V CMOS logic thresholds. Self-bias operation below 0.7V occurs only when VIN and EN are absent and PG is pulled up to ≥3V.

Can MPQ2177GQHE-AEC1-Z operate in discontinuous conduction mode (DCM)?

No. The MPQ2177GQHE-AEC1-Z operates exclusively in forced continuous conduction mode (FCCM) across the full 0–1A load range. This eliminates audible noise and ensures predictable EMI profile and output ripple, critical for automotive EMC compliance-but increases light-load quiescent current compared to DCM-capable alternatives.

What is the purpose of the "wettable flank" feature in the QFN-8 package?

The wettable flank design exposes vertical sidewalls of the QFN leads, enabling automated optical inspection (AOI) of solder joint quality during reflow. This is mandated for AEC-Q100 automotive production to detect voids, insufficient fillets, or bridging-reducing field failure risk in safety-critical power rails without requiring X-ray inspection.

MPQ2177GQHE-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:: 1A

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)

MPQ2177GQHE-AEC1-Z FAQ

1.How can I place an order for MPQ2177GQHE-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2177GQHE-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 MPQ2177GQHE-AEC1-Z reliable?

The price and inventory of MPQ2177GQHE-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 MPQ2177GQHE-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ2177GQHE-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2177GQHE-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2177GQHE-AEC1-Z?

MPQ2177GQHE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2177GQHE-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 MPQ2177GQHE-AEC1-Z?

For technical support, including MPQ2177GQHE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2177GQHE-AEC1-Z requirements.

6.How does Aetrix verify that MPQ2177GQHE-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ2177GQHE-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 MPQ2177GQHE-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ2177GQHE-AEC1-Z?

All MPQ2177GQHE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2177GQHE-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 MPQ2177GQHE-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ2177GQHE-AEC1-Z:

1.Submit a request within 90 days.

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

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