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

Monolithic Power Systems Inc. MPQ2166GDE-AEC1-P

Name: MPQ2166GDE-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ2166GDE-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2166GDE-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 18-PowerVFQFN

Datasheet:: MPQ2166GDE-AEC1-P.pdf

Description:: IC REG BCK ADJ 2A/2A/3A/1A 18QFN

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Product details

Overview

MPQ2166GDE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified dual synchronous buck regulator supporting 2A/2A or 3A/1A output configurations, operating from 2.7V–6V input with 60µA quiescent current and integrated 55mΩ/20mΩ MOSFETs. It delivers adjustable 0.6V–5.5V outputs per channel, features dual power-good (PG) indicators, external soft-start (SS), and 180° phase-shifted operation for reduced input ripple - deployed in automotive infotainment and instrument clusters.

For engineers reviewing the MPQ2166GDE-AEC1-P datasheet, MPQ2166GDE-AEC1-P pinout, MPQ2166GDE-AEC1-P application, or MPQ2166GDE-AEC1-P equivalent, key selection criteria include AEC-Q100 qualification, dual-channel independent enable/control, 100% duty cycle capability, peak-current-mode control with internal compensation, and wettable flank QFN-18 (2.5mm×3.5mm) packaging for automotive-grade solder joint inspection.

Technical Context

The MPQ2166GDE-AEC1-P implements peak-current-mode control with internal compensation per channel, enabling fast transient response and inherent cycle-by-cycle over-current protection. Its dual-phase architecture supports 180° out-of-phase switching to minimize input capacitor RMS current and reduce EMI.

It operates in either Advanced Asynchronous Modulation (AAM) mode for ultra-low IQ (<60µA) at light load or Forced Continuous Conduction Mode (FCCM) for fixed-frequency, low-noise regulation - with mode selection via the CCM pin. Both channels support 100% duty cycle and independent soft-start, PG, and enable functions.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7V to 6V - compatible with single-cell Li+ battery systems and automotive 5V rail inputs.
Output Current Configurations	2A/2A or 3A/1A - configurable per-channel current capability without external component changes.
Quiescent Current	60µA - enables >10-year battery standby in always-on automotive modules.
Switching Frequency	Up to 3MHz - supports compact 0.68µH inductors and minimizes solution footprint.
Feedback Reference Voltage	0.600V ±12mV - enables precise output regulation down to 0.6V with standard resistor dividers.
Thermal Shutdown Threshold	175°C - protects against sustained overload while allowing full 125°C junction operation in AEC-Q100 environments.
Package	QFN-18 (2.5mm × 3.5mm) with wettable flanks - supports automated optical solder-joint inspection per automotive manufacturing standards.

Pinout & Package

MPQ2166GDE-AEC1-P is housed in a thermally enhanced, wettable flank QFN-18 package (2.5mm × 3.5mm, 0.5mm pitch), optimized for automotive PCB assembly and thermal performance (θJA = 50°C/W on 4-layer board).

Pin/Terminal	Circuit Role	Design Meaning
EN1 / EN2	Independent channel enable inputs	Digital logic-level control (0.4V/1.6V thresholds); allows staggered startup or fault-isolated shutdown per channel.
FB1 / FB2	Output voltage feedback inputs	Connect to resistive divider; internal 0.6V reference enables 0.6V–5.5V output programming with <±2% regulation accuracy.
PG1 / PG2	Open-drain power-good indicators	Assert high when V_FBx ≥ 90% of V_REF; assert low at ≤82% - provides real-time channel health monitoring for safety-critical systems.
SS1 / SS2	External soft-start timing inputs	Capacitor-programmable ramp rate (default 0.5ms); prevents inrush current and output overshoot during cold start.
FREQ	Frequency set/synchronization input	Resistor-programmable up to 3MHz or accepts external SYNC clock (350kHz–3MHz) for EMI reduction and system-level timing alignment.
CCM	Mode control input	Pull low for AAM (ultra-efficient light-load operation); pull high for FCCM (fixed-frequency, low-noise regulation).
VIN1 / VIN2	Independent channel input supplies	Supports split-rail or shared-input configurations; decoupling required locally to suppress switching noise.
SW1 / SW2	Switch node outputs	Drive external inductors; integrate 55mΩ HS and 20mΩ LS MOSFETs - eliminates need for external Schottky diodes.
PGND1 / PGND2 / AGND	Power and analog ground terminals	Separate PGND pins per channel reduce ground bounce; AGND must be externally tied to PGND for stable reference.

Key Features

Feature	Design Value
AEC-Q100 Grade-1 qualification	Rated for −40°C to +125°C junction operation with full automotive reliability testing (HTOL, TC, UHAST, etc.).
Dual independent power-good (PG) outputs	Per-channel fault detection with 30µs rising / 40µs falling delay - enables ISO 26262 ASIL-B diagnostic coverage.
180° phase-shifted dual-channel operation	Reduces input ripple by ~70% vs. in-phase operation - allows smaller, lower-cost input capacitors in space-constrained modules.
Wettable flank QFN package	Enables automated X-ray and AOI inspection of solder joints - meets IATF 16949 process validation requirements.
Advanced Asynchronous Modulation (AAM)	Extends light-load efficiency beyond 85% at 1mA - critical for always-on telematics and ADAS sensor modules.

Applications

Automotive Infotainment

Automotive Instrument Clusters

Use Scenario: Powering SoC, DDR memory, and display interfaces in head-unit systems with strict EMC and thermal constraints.

IC Role / Device Role / Timing Role: Dual-channel buck regulator supplying 1.1V core and 3.3V I/O rails with independent sequencing and PG monitoring.

Use Value: 180° phase shift reduces input ripple amplitude, lowering EMI filter size and cost while maintaining AEC-Q100 compliance.

Use Scenario: Supplying microcontroller, TFT backlight driver, and CAN transceiver in digital dashboards requiring high reliability.

IC Role / Device Role / Timing Role: Primary power management IC delivering 1.8V (MCU core) and 5.0V (backlight) with independent EN/PG per rail.

Use Value: Wettable flank package ensures solder joint integrity across thermal cycling; 60µA IQ extends battery backup runtime during ignition-off states.

Automotive Telematics Control Units

ADAS Sensor Modules

Use Scenario: Powering LTE modem, GNSS receiver, and secure MCU in connected vehicle gateways with low standby power demand.

IC Role / Device Role / Timing Role: Dual-output regulator operating in AAM mode for sub-100µA system sleep current, with PG signaling for wake-up validation.

Use Value: 60µA quiescent current enables >10-year battery-backed GPS tracking; FCCM mode supports burst transmission with low output ripple.

Use Scenario: Supplying image sensor, ISP, and radar transceiver in camera/radar modules where thermal density and EMI are tightly constrained.

IC Role / Device Role / Timing Role: High-efficiency dual buck delivering 1.2V (sensor core) and 2.8V (interface) with 3MHz switching to shrink passive size.

Use Value: 3MHz operation allows use of 0.68µH inductors - reducing solution height to <1.2mm and improving thermal dissipation in sealed housings.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ2166GD-AEC1	Same silicon, QFN-18 (2mm×3mm) package without wettable flanks; θJA = 70°C/W.	Limited to non-inspection-critical automotive modules; unsuitable for IATF 16949 AOI-requiring production lines.	Select when board space is tighter and solder-joint inspection is handled manually or via X-ray only.
TPS65218D0RSLR	TI part with integrated LDOs, RTC, and fuel gauge; higher IQ (120µA); no wettable flanks; not AEC-Q100 Grade-1.	Targets industrial PMIC use; lacks automotive qualification and dual-buck efficiency optimization for Li+-fed systems.	Consider only if system requires integrated power sequencing, battery monitoring, or mixed analog/digital rails beyond dual buck.

Compared with MPQ2166GD-AEC1, the GDE variant adds wettable flanks and improves thermal resistance; versus TPS65218D0RSLR, it delivers superior light-load efficiency, AEC-Q100 Grade-1 compliance, and dedicated dual-buck optimization - making it the preferred choice for space- and reliability-constrained automotive power rails.

Availability

MPQ2166GDE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics control units requiring stable component supply under AEC-Q100 qualification and long-term production continuity.

Supply support for MPQ2166GDE-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global distribution through authorized partners.

The MPQ2166 product line targets automotive power management applications requiring AEC-Q100 qualification, ultra-low quiescent current, and compact dual-buck integration - specifically engineered for next-generation infotainment, cluster, and ADAS subsystems.

FAQ

What is the difference between MPQ2166GDE-AEC1-P and MPQ2166GD-AEC1?

The MPQ2166GDE-AEC1-P uses the QFN-18 (2.5mm×3.5mm) package with wettable flanks for automated optical inspection, while MPQ2166GD-AEC1 uses the smaller QFN-18 (2mm×3mm) without wettable flanks. The GDE variant also offers lower thermal resistance (θJA = 50°C/W vs. 70°C/W) and is rated for higher continuous power dissipation (2.5W vs. 1.78W) - critical for high-ambient automotive under-hood applications.

Can MPQ2166GDE-AEC1-P operate with only one channel enabled?

Yes. Each channel has independent EN1/EN2 and PG1/PG2 pins, allowing single-channel operation without modification. When one channel is disabled, its associated SW, FB, and SS pins enter high-impedance state, and the enabled channel maintains full functionality including soft-start, PG assertion, and current limiting - verified per datasheet Section 9 "Operation".

What is the minimum external SS capacitor value for reliable soft-start?

The minimum recommended external SS capacitor is 1nF, yielding ~330µs soft-start time using the internal 3.2µA charge current. Values below 1nF risk insufficient ramp control and output overshoot; values above 100nF extend startup beyond typical system timing budgets. Datasheet Equation (1) confirms t_SS ≈ (C_SS × 0.6V) / 3.2µA.

Does MPQ2166GDE-AEC1-P support spread-spectrum frequency modulation?

No. The MPQ2166GDE-AEC1-P does not implement spread-spectrum modulation. It supports fixed-frequency operation (via RFREQ resistor) or external synchronization (350kHz–3MHz), but lacks intentional frequency dithering. EMI reduction relies on 180° phase shift, high switching frequency (up to 3MHz), and tight layout guidance in the datasheet.

How is short-circuit protection implemented on each channel?

Each channel employs valley-current detection and hiccup-mode recovery: upon detecting output short (FB drop to 60% of VREF with valid SS), the affected channel disables switching, discharges the SS capacitor, and attempts automatic restart after a timeout. This limits average power dissipation and prevents thermal runaway - confirmed in Section 8 "Current Limit and Short Circuit" of the datasheet.

Is the 0.6V feedback reference trimmed across temperature?

Yes. The internal 0.6V reference is trimmed to ±2% over −40°C to +125°C (0.588V to 0.612V), as specified in Electrical Characteristics Table (VFB min/max). This ensures stable output regulation across full AEC-Q100 temperature range without requiring external calibration or compensation networks.

Can FREQ pin be left floating during operation?

No. The FREQ pin must be terminated - either with a resistor to GND for internal oscillator setting or with a clean external SYNC clock (350kHz–3MHz). Floating FREQ causes undefined oscillator behavior, potential startup failure, or erratic switching frequency, as explicitly warned in the "Oscillator and SYNC Function" section of the datasheet.

MPQ2166GDE-AEC1-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: MPQ

Package/Case:: 18-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):: 2.7V

Voltage - Input (Max):: 6V

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

Voltage - Output (Max):: 5.5V

Current - Output:: 2A/2A, 3A/1A

Frequency - Switching:: Up to 3MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount, Wettable Flank

Supplier Device Package:: 18-QFN (2.5x3.5)

MPQ2166GDE-AEC1-P FAQ

1.How can I place an order for MPQ2166GDE-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2166GDE-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 MPQ2166GDE-AEC1-P reliable?

The price and inventory of MPQ2166GDE-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 MPQ2166GDE-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ2166GDE-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2166GDE-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2166GDE-AEC1-P?

MPQ2166GDE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2166GDE-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 MPQ2166GDE-AEC1-P?

For technical support, including MPQ2166GDE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2166GDE-AEC1-P requirements.

6.How does Aetrix verify that MPQ2166GDE-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ2166GDE-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 MPQ2166GDE-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ2166GDE-AEC1-P?

All MPQ2166GDE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2166GDE-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 MPQ2166GDE-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ2166GDE-AEC1-P:

1.Submit a request within 90 days.

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

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