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Monolithic Power Systems Inc. MPQ2166GRH-AEC1-Z
- Part No.:
- MPQ2166GRH-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 18-PowerVFQFN
- Datasheet:
-
MPQ2166GRH-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ DL 18QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,149
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Product details
Overview
MPQ2166GRH-AEC1-Z 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 cluster power rails.
For engineers reviewing the MPQ2166GRH-AEC1-Z datasheet, MPQ2166GRH-AEC1-Z pinout, MPQ2166GRH-AEC1-Z application, or MPQ2166GRH-AEC1-Z equivalent, key selection considerations include dual-channel phase-shifted operation, AAM/FCCM mode control via CCM pin, PG status per channel, external soft-start programmability, and QFN-18 (2.5mm×3.5mm) wettable flank packaging for automotive-grade reflow inspection.
Technical Context
The MPQ2166GRH-AEC1-Z implements peak-current-mode control with internal compensation per channel, enabling fast transient response and cycle-by-cycle over-current protection. Its 180° out-of-phase switching reduces input ripple and allows smaller input capacitors.
It supports two distinct light-load modes: Advanced Asynchronous Modulation (AAM) for ultra-low IQ (60µA) at no load, and Forced Continuous Conduction Mode (FCCM) for fixed-frequency operation with lower output ripple - selected by logic level on the CCM pin (≤0.4V for AAM, ≥1.6V for FCCM).
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 derivatives. |
| Output Current Configurations | 2A/2A or 3A/1A - enables flexible power partitioning across dual SoC domains or mixed-voltage subsystems. |
| Quiescent Current | 60µA - sustains low-power sleep states in always-on automotive modules without battery drain. |
| Switching Frequency | Up to 3MHz (externally syncable) - permits use of sub-1µH inductors for compact, high-density PCB layouts. |
| Feedback Reference Voltage | 0.600V ±12mV (–40°C to +125°C) - enables precise output regulation with minimal resistor tolerance impact. |
| Power Good Threshold Accuracy | ±5% window (82–90% of VREF) - provides robust undervoltage/overvoltage detection for downstream sequencers. |
| Thermal Shutdown Threshold | 175°C with 40°C hysteresis - ensures safe recovery after overload without latch-up or manual reset. |
Pinout & Package
MPQ2166GRH-AEC1-Z uses a QFN-18 (2.5mm × 3.5mm) wettable flank package, optimized for automated optical inspection (AOI) in automotive production lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Independent enable inputs | Per-channel startup control; threshold 0.4V (low) / 1.6V (high) - supports staggered power sequencing. |
| FB1 / FB2 | Feedback inputs | 0.6V reference comparator inputs - set output voltage via external resistive divider; ±12mV temp drift ensures stability across automotive range. |
| SS1 / SS2 | Soft-start timing nodes | Capacitor-programmable ramp rate (ISS = 3.2µA); default 0.5ms - prevents inrush into downstream LDOs or FPGAs. |
| PG1 / PG2 | Open-drain power-good indicators | Assert high when VFB reaches 90% VREF; deassert at 82% - enables fault-aware system monitoring and reset coordination. |
| SW1 / SW2 | Switch node outputs | Connect to external inductors; integrate 55mΩ HS / 20mΩ LS MOSFETs - eliminates need for Schottky diodes and reduces BOM count. |
| FREQ | Frequency set/sync input | Resistor-programmable (298–3300kHz) or external clock sync (0.35–3MHz) - enables EMI spread-spectrum tuning or multi-rail synchronization. |
| CCM | Mode control input | Logic-selectable AAM (low) or FCCM (high) - balances efficiency vs. noise requirements without firmware intervention. |
| PGND1 / PGND2 / AGND | Ground terminals | Separate power grounds per channel + analog ground - minimizes switching noise coupling into feedback paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel 180° phase shift | Reduces input RMS current by ~30%, allowing smaller input ceramic capacitors (e.g., 2×22µF instead of 4×22µF). |
| Wettable flank QFN package | Enables automated solder-joint inspection per IPC-A-610 Class 3 - required for AEC-Q100-compliant automotive manufacturing. |
| AAM light-load optimization | Extends battery runtime in telematics modules by maintaining >85% efficiency at 1mA load (vs. <60% in FCCM). |
| 100% duty-cycle capability | Supports dropout operation down to VIN – VDROP ≈ VOUT, critical for cold-crank (4.5V) scenarios in 5V domain regulation. |
| Hiccup-mode short-circuit protection | Auto-retries with soft-start after fault clearance - avoids permanent shutdown during transient overloads (e.g., motor stall). |
Applications
| Automotive Infotainment | Automotive Clusters |
|---|---|
Use Scenario: Powering SoC core (1.2V), GPU (1.0V), and DDR memory (1.1V) in head-unit designs. IC Role / Device Role / Timing Role: Dual-channel buck regulator delivering independent, sequenced, and monitored power rails. Use Value: 180° phase shift cuts input capacitor stress; PG signals coordinate SoC boot sequence; AEC-Q100 Grade-1 ensures reliability over 15-year vehicle life. |
Use Scenario: Supplying MCU (3.3V), display driver (5.0V), and CAN transceiver (5.0V) in digital instrument clusters. IC Role / Device Role / Timing Role: Single-package dual regulator replacing discrete solutions to meet tight board space constraints. Use Value: Wettable flank package enables AOI traceability; 60µA IQ extends backup power hold-up time during ignition-off; FCCM mode suppresses audible coil whine. |
| Automotive Telematics | Battery-Powered Devices |
Use Scenario: Powering LTE modem (1.8V), GNSS receiver (1.2V), and eSIM interface (3.0V) in connected car gateways. IC Role / Device Role / Timing Role: High-efficiency dual buck managing dynamic load profiles with rapid wake/sleep transitions. Use Value: AAM mode achieves >90% efficiency at 100µA load - extends cellular module standby time; PG flags signal loss or GPS fault conditions. |
Use Scenario: Regulating processor (1.1V), sensor hub (1.8V), and BLE radio (3.3V) in portable diagnostic tools. IC Role / Device Role / Timing Role: Compact, low-IQ dual regulator enabling long runtime on single Li+ cell (2.7–4.2V). Use Value: 2.7V min input supports full battery discharge range; 3MHz max switching allows 0.47µH inductors - reducing solution size by 40% vs. 500kHz parts. |
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 |
|---|---|---|---|
| TPS6521905RGER | 3.3V fixed + adjustable dual output; 4A/2A rating; no AAM mode; 12µA IQ in shutdown only | Lacks programmable light-load efficiency; requires external PG logic; not AEC-Q100 qualified | Choose for cost-sensitive non-automotive industrial use where fixed 3.3V rail simplifies design. |
| RTQ2134BGQW | 2.5V–5.5V input; 2A/2A only; 35µA IQ; integrates I²C telemetry but no SS/PG per channel | Requires microcontroller for configuration; lacks independent soft-start and per-rail PG - unsuitable for safety-critical sequencing. | Prefer when telemetry (VOUT/IOUT/temp) is mandatory and AEC-Q100 is not required. |
Compared with TPS6521905RGER and RTQ2134BGQW, MPQ2166GRH-AEC1-Z uniquely delivers AEC-Q100 Grade-1 compliance, per-channel PG/SS, 180° phase shift, and AAM/FCCM mode selection - making it the only option meeting full functional safety and thermal management requirements for ASIL-B automotive subsystems.
Availability
MPQ2166GRH-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, digital instrument clusters, and telematics gateways requiring stable component supply under extended temperature and vibration conditions.
Supply support for MPQ2166GRH-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 analog and power ICs, with over 20 years of expertise in DC/DC conversion and automotive-grade power management.
The MPQ2166 product line targets AEC-Q100-compliant dual-output power supplies for next-generation automotive electronics, emphasizing low IQ, small footprint, and robust fault handling in harsh environments.
FAQ
What is the maximum allowable input voltage for MPQ2166GRH-AEC1-Z?
The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.7V to 6V. Operation above 6V risks permanent damage due to internal MOSFET breakdown. The device includes VIN under-voltage lockout (UVLO) with 2.55V rising threshold and 230mV hysteresis to prevent erratic startup near brownout conditions.
How does the CCM pin affect efficiency and noise performance?
Pulling CCM ≤0.4V enables Advanced Asynchronous Modulation (AAM), reducing quiescent current to 60µA and improving light-load efficiency (>85% at 1mA), but increases output voltage ripple. Pulling CCM ≥1.6V forces Continuous Conduction Mode (FCCM), fixing switching frequency (reducing EMI peaks) and lowering ripple, at the cost of higher 50µA shutdown current and reduced light-load efficiency.
Can MPQ2166GRH-AEC1-Z operate with only one channel enabled?
Yes - EN1 and EN2 are independently controlled. Disabling one channel (ENx ≤0.4V) shuts down its power stage and associated bias circuits, reducing total IQ to ~30µA. The active channel maintains full functionality including PG, SS, and frequency sync. Thermal derating must account for asymmetric power dissipation in PCB layout.
What is the purpose of the wettable flank feature in the QFN-18 package?
The wettable flank design exposes solderable sidewalls on all perimeter pins, enabling automated optical inspection (AOI) of solder joint quality - a mandatory requirement for AEC-Q100 Grade-1 automotive production. It improves process yield and field reliability by detecting voids, insufficient fillets, or bridging that standard QFN packages cannot verify.
How is soft-start time calculated when using an external capacitor on SS1 or SS2?
Soft-start time tSS (ms) = CSS (nF) × 0.6V / 3.2µA, where CSS is the external capacitor value. For example, a 4.7nF capacitor yields tSS ≈ 0.88ms. The internal 0.5ms default applies if SSx is left floating. This linear ramp prevents output overshoot and limits inrush current into downstream bulk capacitance.
Does MPQ2166GRH-AEC1-Z support external clock synchronization across both channels?
Yes - the FREQ pin accepts an external 0.35–3MHz clock signal. Channel 1's switching edge locks to the external clock's rising edge; Channel 2 automatically maintains 180° phase offset. This enables deterministic EMI reduction and multi-rail synchronization without additional timing ICs or complex layout constraints.
What protection features are implemented per channel?
Each channel includes cycle-by-cycle over-current protection (4.5A typical HS limit), hiccup-mode short-circuit recovery, thermal shutdown (175°C), and valley current detection. Additionally, per-channel PG monitors FB voltage (90%/82% VREF thresholds), and UVLO guards the entire device against input brownout - all verified per AEC-Q100 stress test requirements.
MPQ2166GRH-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)
MPQ2166GRH-AEC1-Z FAQ
1.How can I place an order for MPQ2166GRH-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2166GRH-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 MPQ2166GRH-AEC1-Z reliable?
The price and inventory of MPQ2166GRH-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 MPQ2166GRH-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2166GRH-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2166GRH-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2166GRH-AEC1-Z?
MPQ2166GRH-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2166GRH-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 MPQ2166GRH-AEC1-Z?
For technical support, including MPQ2166GRH-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2166GRH-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2166GRH-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2166GRH-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 MPQ2166GRH-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2166GRH-AEC1-Z?
All MPQ2166GRH-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2166GRH-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 MPQ2166GRH-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2166GRH-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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