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

Monolithic Power Systems Inc. MPQ2166AGRHE-AEC1-Z

Name: MPQ2166AGRHE-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ2166AGRHE-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ2166AGRHE-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 18-PowerVFQFN

Datasheet:: MPQ2166AGRHE-AEC1-Z.pdf

Description:: IC REG BUCK ADJ DL 18QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MPQ2166AGRHE-AEC1-Z from Monolithic Power Systems is a dual-channel, AEC-Q100 Grade-1 qualified synchronous buck regulator operating from 2.7V–6V input, delivering configurable 2A/2A or 3A/1A output current per channel, with 65µA quiescent current and integrated 55mΩ/20mΩ MOSFETs - designed for automotive infotainment, clusters, and telematics power rails.

For engineers reviewing the MPQ2166AGRHE-AEC1-Z datasheet, MPQ2166AGRHE-AEC1-Z pinout, MPQ2166AGRHE-AEC1-Z application, or MPQ2166AGRHE-AEC1-Z equivalent, this device supports 180° phase-shifted operation, external sync up to 3MHz, AAM/FCCM mode selection via CCM pin, and dual independent power-good indicators - critical for low-noise, high-efficiency dual-rail automotive power design.

Technical Context

The MPQ2166A employs peak current mode control with internal compensation per channel, enabling fast transient response and cycle-by-cycle over-current protection. Each channel features independent soft-start (SS1/SS2), feedback (FB1/FB2), and enable (EN1/EN2) controls, supporting asymmetric load configurations (e.g., 3A/1A) without external compensation components.

It integrates dual high-side (55mΩ) and synchronous rectifier (20mΩ) switches, operates in 100% duty cycle mode for low-dropout regulation, and uses a PLL-based oscillator synchronized via FREQ pin - allowing precise timing alignment across channels while minimizing input ripple through 180° out-of-phase switching.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7V to 6V - supports single-cell Li+ battery and automotive 5V rail inputs with 2.55V UVLO threshold.
Output Current Config	2A/2A or 3A/1A - selectable per channel via external component layout; enables flexible rail partitioning.
Quiescent Current	65µA - enables always-on subsystems in automotive applications without excessive battery drain.
Switching Frequency	Configurable up to 3MHz via resistor or external sync - allows compact magnetics and EMI optimization.
R_DS(ON) (HS/Low-Side)	55mΩ / 20mΩ - reduces conduction loss and thermal rise at full load, supporting >90% peak efficiency.
Power Good Accuracy	±5% V_REF window (90%/82%) - ensures reliable rail sequencing and fault detection in safety-critical systems.
Operating Junction Temp	−40°C to +125°C - meets AEC-Q100 Grade-1 requirements for under-hood and dashboard environments.

Pinout & Package

MPQ2166AGRHE-AEC1-Z is housed in a wettable flank QFN-18 package (2.5mm × 3.5mm), optimized for automated optical inspection (AOI) and thermal performance in automotive PCB assemblies.

Pin/Terminal	Circuit Role	Design Meaning
1, 15	PG2 / PG1	Open-drain power-good indicators - require external pull-up; assert high when FB ≥ 90% V_REF, low when ≤ 82% V_REF.
2, 14	PGND2 / PGND1	Separate power ground pins per channel - must be externally tied to minimize ground bounce and improve PSRR.
3, 13	SW2 / SW1	Switch node connections - directly drive external inductors; require tight layout to reduce EMI and voltage spikes.
4, 12	VIN2 / VIN1	Independent input supplies per channel - decoupling capacitors must be placed adjacent to each pin.
5, 11	SS2 / SS1	Soft-start timing inputs - capacitor-to-ground sets ramp time; floating defaults to 0.5ms internal ramp.
6, 10	FB2 / FB1	Feedback inputs - compare against 0.6V internal reference; set output voltage via external resistive divider.
7	AGND	Analog ground - must be externally connected to both PGND1 and PGND2 to prevent noise coupling into error amplifiers.
8	VCC	Internal bias supply - tied externally to VIN1/VIN2; requires 0.1–1µF decoupling to AGND for stable core operation.
9	CCM	AAM/FCCM mode select - low = advanced asynchronous modulation (high efficiency at light load); high = forced CCM (fixed frequency, low ripple).
17	FREQ	Frequency set/sync input - resistor-to-ground sets f_SW; external clock (0.35–3MHz) synchronizes CH1, with CH2 180° out-of-phase.
16, 18	EN1 / EN2	Channel enable inputs - logic thresholds: <0.4V = shutdown, >1.6V = active; no internal pull-up/down - must be driven.

Key Features

Feature	Design Value
180° phase-shifted operation	Reduces input RMS current by ~30%, enabling smaller input bulk capacitors and lower EMI in dual-rail systems.
Selectable AAM or FCCM mode	AAM extends battery life in standby; FCCM maintains fixed frequency and low output ripple during light-load telemetry bursts.
Dual independent PG outputs	Enables per-rail power sequencing and fault isolation in ASIL-B compliant domains without external monitoring ICs.
100% duty cycle capability	Supports ultra-low dropout (e.g., 5V→4.8V) in automotive cold-crank scenarios where input dips to 2.7V.
Wettable flank QFN package	Facilitates automated solder-joint inspection per IPC-A-610 Class 3 standards - required for automotive production traceability.

Applications

Automotive Infotainment

Automotive Clusters

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

IC Role / Device Role / Timing Role: Dual-channel buck regulator supplying 1.2V (SoC I/O) and 1.8V (DDR) rails with 180° phase shift to suppress input ripple.

Use Value: 65µA IQ enables always-on voice wake-up functionality; AEC-Q100 Grade-1 ensures reliability across −40°C to +125°C junction range.

Use Scenario: Generating instrument cluster MCU, TFT backlight, and CAN transceiver rails in space-constrained dashboards.

IC Role / Device Role / Timing Role: Configured as 3A/1A to deliver high-current 3.3V MCU rail and low-noise 5V backlight rail with independent soft-start sequencing.

Use Value: Dual PG outputs enable safe boot-order enforcement; wettable flank package supports AOI for zero-defect automotive manufacturing.

Automotive Telematics

Battery-Powered Devices

Use Scenario: Supplying LTE modem, GNSS receiver, and eSIM power domains in vehicle-to-cloud communication modules.

IC Role / Device Role / Timing Role: Operates in AAM mode during cellular idle states to minimize sleep current; FCCM activated during data transmission bursts.

Use Value: 3MHz sync capability aligns switching with baseband processor clocks to avoid beat-frequency interference in RF-sensitive zones.

Use Scenario: Power management in portable diagnostic tools and handheld test equipment running on single-cell Li+ batteries.

IC Role / Device Role / Timing Role: Delivers 1.8V and 3.3V rails from 2.7–4.2V battery input; 100% duty cycle sustains output during battery discharge below 3V.

Use Value: Integrated 55mΩ/20mΩ MOSFETs eliminate external diodes and reduce BOM count; QFN-18 footprint saves board area vs. discrete solutions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ2169AGU-AEC1-Z	Single-channel, 4A output; no dual-rail or phase-shift capability; same 2.7–6V input and AEC-Q100 Grade-1 rating.	Suitable only for single-rail systems requiring higher current; lacks independent PG, SS, and FB per channel.	Select when system needs one high-current rail instead of two independently regulated rails.
TPS65023BRSBR	Triple-output PMIC (2x DC/DC + LDO); 3.3V/1.8V/1.2V fixed outputs; 2.5–5.5V input; not AEC-Q100 qualified.	Targeted at non-automotive portable electronics; lacks programmable VOUT, sync, or AAM/FCCM control.	Choose for cost-sensitive consumer designs where AEC-Q100 compliance and configurability are not required.

Compared with MPQ2166AGRHE-AEC1-Z, MPQ2169AGU-AEC1-Z simplifies design for single-rail use but forfeits dual-channel flexibility, while TPS65023BRSBR offers fixed outputs and integration at the expense of automotive qualification and dynamic mode control.

Availability

MPQ2166AGRHE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for MPQ2166AGRHE-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 over 20 years of expertise in DC/DC conversion, motor drivers, and automotive-grade solutions.

The MPQ2166A belongs to MPS's AEC-Q100-qualified automotive buck regulator product line, engineered specifically for low-IQ, high-efficiency dual-rail power delivery in infotainment, cluster, and ADAS subsystems.

FAQ

What is the minimum recommended input voltage for reliable startup?

The MPQ2166AGRHE-AEC1-Z has an input under-voltage lockout (UVLO) threshold of 2.55V (typical) with 230mV hysteresis. Startup is guaranteed above 2.7V per the recommended operating conditions, and the device supports continuous operation down to 2.7V - critical for automotive cold-crank scenarios where battery voltage dips transiently.

How does the 180° phase-shifted operation reduce input ripple?

By driving the two buck channels 180° out of phase, their input current waveforms cancel at the fundamental switching frequency, reducing RMS input ripple by up to 30%. This allows use of smaller ceramic input capacitors and lowers conducted EMI - verified in typical application schematics with 10µF × 2 X5R input caps.

Can the MPQ2166AGRHE-AEC1-Z operate with only one channel enabled?

Yes. EN1 and EN2 are independently controlled. Disabling one channel (e.g., pulling EN2 ≤ 0.4V) places it in shutdown with <0.2µA quiescent current, while the active channel continues regulation. Both PG outputs remain functional, enabling per-channel health monitoring even in asymmetric configurations.

What is the maximum allowable output voltage in FCCM mode?

In forced continuous conduction mode (FCCM), the maximum output voltage is limited to 0.5 × V_IN - for example, 2.5V when V_IN = 5V. This constraint arises from the PWM control architecture; exceeding it risks instability. In AAM mode, V_OUT can reach up to 5.5V regardless of input, as confirmed in the Electrical Characteristics table.

Is external compensation required for stability?

No. The MPQ2166AGRHE-AEC1-Z uses internally compensated peak current mode control, eliminating the need for external compensation networks. Stability is ensured across the full 0.6V–5.5V output range and 2.7V–6V input range with standard 0.68µH–1.5µH inductors and 10µF–22µF ceramic output capacitors.

How is thermal performance validated for automotive use?

Thermal characterization was performed on MPS's EV2166A-RH-00A evaluation board (4-layer, 6.35cm × 6.35cm), measuring θ_JA = 34.8°C/W. At 125°C max junction temperature and 25°C ambient, the device sustains 2A/2A continuous load with <20°C case rise - meeting AEC-Q100 Grade-1 thermal requirements without forced airflow.

Does the wettable flank package affect solder reflow profile?

No. The wettable flank QFN-18 uses standard SnAgCu (SAC305) reflow profiles per J-STD-020. The flank plating enhances solder fillet visibility for AOI but does not alter thermal mass or required peak temperature (260°C max), matching conventional QFN assembly processes used in Tier-1 automotive manufacturing.

MPQ2166AGRHE-AEC1-Z 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:: 2

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:: 350kHz ~ 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)

MPQ2166AGRHE-AEC1-Z FAQ

1.How can I place an order for MPQ2166AGRHE-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-Z reliable?

The price and inventory of MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-Z is usually 5 days.

3.What payment methods are accepted for MPQ2166AGRHE-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2166AGRHE-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ2166AGRHE-AEC1-Z?

MPQ2166AGRHE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-Z?

For technical support, including MPQ2166AGRHE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2166AGRHE-AEC1-Z requirements.

6.How does Aetrix verify that MPQ2166AGRHE-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-Z meets industry standards.

7.What is the process for return or replacement of MPQ2166AGRHE-AEC1-Z?

All MPQ2166AGRHE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-Z part is unused and in its original packaging.

Return procedure for MPQ2166AGRHE-AEC1-Z:

1.Submit a request within 90 days.

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

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