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

Monolithic Power Systems Inc. MPQ2166GRH-AEC1-P

Name: MPQ2166GRH-AEC1-P
Brand: Monolithic Power Systems Inc.
SKU: MPQ2166GRH-AEC1-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2166GRH-AEC1-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 18-PowerVFQFN

Datasheet:: MPQ2166GRH-AEC1-P.pdf

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

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Inventory:4,275

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Product details

Overview

MPQ2166GRH-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 0.6V–5.5V adjustable output, 60µA quiescent current, and integrated 55mΩ/20mΩ MOSFETs - deployed in automotive infotainment and instrument clusters for single-cell Li+-powered subsystems.

For engineers reviewing the MPQ2166GRH-AEC1-P datasheet, MPQ2166GRH-AEC1-P pinout, MPQ2166GRH-AEC1-P application, or MPQ2166GRH-AEC1-P equivalent, key selection criteria include AEC-Q100 qualification, dual-channel phase-shifted operation, programmable soft-start and frequency, power-good signaling per channel, and thermal shutdown with hiccup-mode short-circuit protection.

Technical Context

The MPQ2166GRH-AEC1-P implements peak-current-mode control with internal compensation across both channels, enabling fast transient response and cycle-by-cycle over-current protection. It supports 180° out-of-phase switching to reduce input ripple and allows 100% duty-cycle operation for low-dropout regulation.

Its dual-mode light-load control - Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM) - is selected via the CCM pin, with AAM delivering >90% peak efficiency at light loads and FCCM maintaining fixed-frequency operation and lower output ripple, subject to VOUT ≤ 0.5 × VIN in FCCM.

Key Specifications

Parameter	Value and Actual Design Meaning
Input voltage range	2.7V to 6V - supports single-cell Li+ battery (2.8V–4.2V) and 3.3V/5V rail inputs without external pre-regulation.
Output current capability	Configurable as dual 2A channels or asymmetric 3A/1A - enables flexible power partitioning for mixed-voltage SoC subsystems.
Quiescent current	60µA - minimizes standby power loss in always-on automotive modules such as telematics wake-up circuits.
Switch R_DS(ON)	55mΩ high-side / 20mΩ low-side - eliminates need for external Schottky diodes and sustains >90% peak efficiency at 1.8V/2A output.
Switching frequency	Programmable up to 3MHz via resistor or external sync clock - permits compact 0.68µH inductors and reduces solution footprint.
Power good accuracy	PG rising threshold = 90% V_REF, falling = 82% V_REF - provides precise ±4% window for reliable rail monitoring in safety-critical clusters.
Thermal protection	175°C shutdown with 40°C hysteresis - prevents latch-up during sustained overload while enabling automatic recovery after cooling.

Pinout & Package

MPQ2166GRH-AEC1-P is housed in a wettable flank QFN-18 package measuring 2.5mm × 3.5mm, optimized for automated optical inspection (AOI) and robust solder joint reliability in automotive reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
EN1 / EN2	Channel enable inputs	Digital control pins with 0.4V low / 1.6V high thresholds - support independent sequencing of dual rails during power-up/down.
FB1 / FB2	Feedback inputs	High-impedance (≤50nA) nodes referencing 0.600V internal bandgap - enable precise output regulation from 0.6V using standard resistor dividers.
SS1 / SS2	Soft-start timing inputs	Accept external capacitors to set ramp time (e.g., 10nF → ~1.9ms); floating defaults to 0.5ms internal ramp - prevents inrush current and output overshoot.
PG1 / PG2	Open-drain power-good outputs	Indicate regulation status per channel (90%/82% V_REF window); require external pull-up to VIN/VCC - enable fault-isolated system-level power sequencing.
FREQ	Frequency programming/sync input	Accepts resistor-to-GND (350kHz–3MHz) or external clock (0.35–3MHz) - synchronizes channel-1 clock edge, with channel-2 auto-phase-shifted 180°.
CCM	Mode control input	Logic-low selects AAM for ultra-low I_Q; logic-high forces FCCM for fixed-frequency stability - critical for EMI-sensitive infotainment audio rails.
SW1 / SW2	Switch node outputs	Connect directly to external inductors; drive internal 55mΩ/20mΩ MOSFET pairs - require tight layout with low-inductance PGND return paths.
PGND1 / PGND2 / AGND	Ground terminals	Separate power grounds per channel plus analog ground - must be joined externally at single-point star ground to avoid noise coupling into feedback paths.

Key Features

Feature	Design Value
180° phase-shifted dual-channel operation	Reduces input capacitor RMS current by ~30%, enabling smaller 10µF ceramic input caps instead of 22µF in in-phase designs.
Wettable flank QFN-18 (2.5mm×3.5mm)	Enables AOI-compatible solder joint inspection - required for AEC-Q100-compliant automotive PCB assembly traceability.
Advanced Asynchronous Modulation (AAM)	Extends light-load efficiency to <1mA load while maintaining regulation - essential for always-on CAN/LIN transceiver bias rails.
Hiccup-mode short-circuit protection	Disables output, discharges SS cap, then retries - prevents thermal runaway during sustained shorts (e.g., connector mating faults).
100% duty-cycle capability	Supports dropout operation down to V_OUT = V_IN − 0.1V - maintains regulation during cold-crank (4.5V→2.7V) in automotive battery transients.

Applications

Automotive Infotainment

Automotive Instrument Clusters

Use Scenario: Powering display backlight drivers, audio codecs, and touch controller ICs in head-unit systems.

IC Role / Device Role / Timing Role: Dual-channel buck supplying 3.3V (audio) and 1.8V (interface) rails with independent enable and PG signaling.

Use Value: Phase-shifted operation cuts input ripple, reducing EMI filtering requirements; AAM mode extends battery runtime during Bluetooth standby.

Use Scenario: Generating core voltages for MCU, graphics processor, and CAN transceivers in digital dashboards.

IC Role / Device Role / Timing Role: Configured as 3A/1A to deliver 1.2V@3A (SoC core) and 5V@1A (CAN PHY), with synchronized FREQ input.

Use Value: 100% duty cycle sustains 1.2V output during 6V→2.7V cold-crank; AEC-Q100 Grade-1 ensures operation from −40°C to +125°C junction.

Automotive Telematics

Battery-Powered Portable Instruments

Use Scenario: Supplying LTE modem, GNSS receiver, and eSIM power domains in connected vehicle gateways.

IC Role / Device Role / Timing Role: Dual 2A channels powering 1.1V modem core and 3.3V RF front-end, with independent SS timing for staggered startup.

Use Value: 60µA quiescent current minimizes parasitic drain on 12V battery during parking mode; PG signals feed watchdog logic for remote diagnostics.

Use Scenario: Regulating precision analog rails (e.g., ADC reference, sensor bias) and digital logic in handheld test equipment.

IC Role / Device Role / Timing Role: 2A/2A configuration delivering 2.5V (analog) and 1.8V (digital), with external sync to system clock for deterministic EMI placement.

Use Value: Internal compensation eliminates loop-stability tuning; wettable flank package ensures IPC-A-610 Class 3 solder joint reliability in field-deployed units.

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
TPS65023BRSBR	3-channel (2 buck + 1 LDO), 2.25MHz max f_SW, no AAM mode, 85µA I_Q	Lacks phase-shifted dual-buck optimization and hiccup-mode SCP; suited for multi-rail non-automotive portable use.	Select when needing integrated LDO and simpler sequencing, but not for AEC-Q100 or ultra-low-I_Q automotive clusters.
RTQ2131B-QA	AEC-Q100 Grade-1, dual 3A/3A, 4.5V–18V input, 1.2µA shutdown I_Q, no wettable flank	Higher input range suits 12V systems; lacks soft-start programmability and PG per channel; requires larger QFN-28 package.	Prefer for 12V automotive body electronics; avoid where board space is constrained or per-rail PG monitoring is mandatory.

Compared with TPS65023BRSBR and RTQ2131B-QA, MPQ2166GRH-AEC1-P uniquely combines AEC-Q100 Grade-1 qualification, wettable flank packaging, per-channel PG/SS/EN, and AAM-mode efficiency below 1mA - making it optimal for space-constrained, safety-aware 2.7V–6V automotive subsystems.

Availability

MPQ2166GRH-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics applications requiring stable component supply under AEC-Q100 compliance and extended temperature operation.

Supply support for MPQ2166GRH-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 manufacturing partnerships.

The MPQ2166 product line delivers AEC-Q100-qualified dual buck regulators targeting automotive subsystems requiring ultra-low quiescent current, small solution size, and robust fault protection - especially in infotainment, cluster, and ADAS domain controllers.

FAQ

What is the maximum allowable input voltage for MPQ2166GRH-AEC1-P?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.7V to 6V. Exceeding 6V risks permanent damage to internal MOSFETs and gate drivers, as specified in the Absolute Maximum Ratings table. Operation above 6V voids AEC-Q100 qualification compliance.

Can MPQ2166GRH-AEC1-P operate with only one channel enabled?

Yes - EN1 and EN2 are independently controlled. Disabling one channel (e.g., pulling EN2 ≤ 0.4V) fully shuts down its power stage, reducing total quiescent current to ~30µA while the active channel maintains regulation and PG signaling.

How does the 180° phase shift improve system-level performance?

The 180° phase shift causes input current ripples from each channel to cancel, reducing total RMS input current by up to 30%. This allows smaller input ceramic capacitors (e.g., 10µF vs. 22µF), lowers EMI filter cost, and decreases board area in space-constrained automotive modules.

What happens during a short-circuit event on one output?

Each channel has independent short-circuit protection. If V_FB drops to 60% of 0.6V while SS is valid, that channel enters hiccup mode: disabling switches, discharging SS capacitor, then retrying soft-start. The unaffected channel continues normal operation unless thermal shutdown triggers globally.

Is external compensation required for stability?

No - the MPQ2166GRH-AEC1-P uses internally compensated peak-current-mode control. No external compensation components are needed; stability is guaranteed across all operating conditions with standard output capacitor ESR ranges (0.5mΩ–50mΩ).

Does the wettable flank package affect thermal performance?

The wettable flank feature improves solder joint inspection but does not alter thermal resistance. θ_JA remains 50°C/W (JESD51-7, 4-layer PCB), matching the standard QFN-18 (2.5mm×3.5mm) variant - thermal design guidelines apply identically.

Can FREQ be left unconnected if not using sync or resistor programming?

No - FREQ must be terminated. Leaving it floating may cause erratic switching frequency or startup failure. For default 2.25MHz operation, connect a 200kΩ resistor from FREQ to GND; for sync, drive with clean 0.35–3MHz clock.

MPQ2166GRH-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)

MPQ2166GRH-AEC1-P FAQ

1.How can I place an order for MPQ2166GRH-AEC1-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2166GRH-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 MPQ2166GRH-AEC1-P reliable?

The price and inventory of MPQ2166GRH-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 MPQ2166GRH-AEC1-P is usually 5 days.

3.What payment methods are accepted for MPQ2166GRH-AEC1-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2166GRH-AEC1-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2166GRH-AEC1-P?

MPQ2166GRH-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2166GRH-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 MPQ2166GRH-AEC1-P?

For technical support, including MPQ2166GRH-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2166GRH-AEC1-P requirements.

6.How does Aetrix verify that MPQ2166GRH-AEC1-P is sourced from the original manufacturer or authorized distributors?

All MPQ2166GRH-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 MPQ2166GRH-AEC1-P meets industry standards.

7.What is the process for return or replacement of MPQ2166GRH-AEC1-P?

All MPQ2166GRH-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2166GRH-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 MPQ2166GRH-AEC1-P part is unused and in its original packaging.

Return procedure for MPQ2166GRH-AEC1-P:

1.Submit a request within 90 days.

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

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