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Monolithic Power Systems Inc. MPQ2166GRH-Z
- Part No.:
- MPQ2166GRH-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 18-PowerVFQFN
- Datasheet:
-
MPQ2166GRH-Z.pdf
- Description:
- IC REG BUCK ADJ DL 18QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,758
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Product details
Overview
MPQ2166GRH-Z from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified, dual-channel synchronous buck regulator supporting 2A/2A or 3A/1A output configurations, operating from 2.7V–6V input and delivering adjustable outputs down to 0.6V with 60µA quiescent current. It integrates dual 55mΩ high-side and 20mΩ low-side MOSFETs, features power-good indicators, external soft-start, 180° phase-shifted operation, and supports forced CCM or AAM light-load modes - ideal for automotive infotainment and battery-powered portable instruments.
For engineers reviewing the MPQ2166GRH-Z datasheet, MPQ2166GRH-Z pinout, MPQ2166GRH-Z application, or MPQ2166GRH-Z equivalent, key selection considerations include its dual-output current flexibility (2A/2A vs. 3A/1A), AEC-Q100 qualification for automotive use, 180° phase shift for reduced input ripple, programmable switching frequency up to 3MHz, and support for both AAM and FCCM modes to optimize efficiency across load ranges.
Technical Context
The MPQ2166GRH-Z employs peak-current-mode control with internal compensation per channel, enabling fast transient response and cycle-by-cycle over-current protection. Its dual independent PWM controllers operate with 180° phase shift to minimize input capacitor RMS current and allow smaller bulk capacitance.
It supports two distinct light-load strategies: Advanced Asynchronous Modulation (AAM) for ultra-low IQ (60µA) and high efficiency at light/no load, and Forced Continuous Conduction Mode (FCCM) for fixed-frequency operation and lower output ripple - selectable via the CCM pin with defined thresholds (0.4V/1.6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 6V - compatible with single-cell Li+ batteries and automotive 5V rail systems. |
| Output Current Configurations | 2A/2A or 3A/1A - enables flexible power partitioning for multi-rail SoC or sensor subsystems. |
| RDS(ON) (HS/LS) | 55mΩ / 20mΩ - reduces conduction loss and enables >90% peak efficiency without external Schottky diodes. |
| Quiescent Current | 60µA - extends battery runtime in always-on automotive telematics and portable instrumentation. |
| Switching Frequency | Up to 3MHz (programmable via resistor or external sync clock) - allows compact magnetics and high-density PCB layout. |
| Power Good Thresholds | PG rising at 90% VFB, falling at 82% VFB - provides precise, hysteresis-based output voltage monitoring for system sequencing. |
| Thermal Shutdown | 175°C with 40°C hysteresis - ensures robust operation under sustained overload or poor heatsinking in enclosed automotive modules. |
Pinout & Package
MPQ2166GRH-Z is housed in a wettable flank QFN-18 package (2.5mm × 3.5mm), optimized for automated optical inspection (AOI) and reliable solder joint formation in automotive-grade assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1, PGND2 | Power ground (ch1/ch2) | Separate thermal and current return paths per channel; must be externally tied to minimize ground bounce and improve PSRR. |
| SW1, SW2 | Switch node (ch1/ch2) | High dv/dt nodes connecting to external inductors; require tight layout and Kelvin grounding to reduce EMI and switching loss. |
| VIN1, VIN2 | Input supply (ch1/ch2) | Independent inputs allow split-rail sourcing or redundancy; decoupling capacitors must be placed adjacent to each pin. |
| FB1, FB2 | Feedback input (ch1/ch2) | 0.6V reference comparator inputs; resistive dividers set output voltage with ±1.2% FB tolerance over temperature. |
| EN1, EN2 | Enable control (ch1/ch2) | Digital enable with 0.4V/1.6V thresholds; supports independent channel sequencing and fault isolation. |
| PG1, PG2 | Power good open-drain (ch1/ch2) | Indicates regulation status per channel; requires external pull-up for system-level power sequencing and fault reporting. |
| SS1, SS2 | Soft-start timing (ch1/ch2) | Capacitor-programmable ramp rate; default 0.5ms internal soft-start prevents inrush current and output overshoot. |
| FREQ | Frequency set/sync input | Accepts resistor for 350kHz–3MHz setting or external clock (350kHz–3MHz) with 100ns min pulse width for master-slave synchronization. |
| CCM | Mode control (AAM/FCCM) | Pull ≤0.4V for AAM (low-IQ); ≥1.6V for FCCM (fixed fSW, lower ripple); floating prohibited. |
| VCC, AGND | Bias supply & analog ground | VCC powers internal LDO; AGND must be connected to PGND externally to avoid noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| 180° phase-shifted dual-channel operation | Reduces input ripple by ~70%, enabling smaller input bulk capacitors and lower EMI filter cost. |
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C junction operation - suitable for under-hood and instrument cluster applications. |
| Wettable flank QFN package | Enables automated solder-joint inspection for zero-defect automotive manufacturing compliance. |
| 100% duty cycle capability | Supports dropout operation down to VOUT ≈ VIN - critical for battery brownout recovery in portable devices. |
| Hiccup-mode short-circuit protection | Auto-retry behavior with soft-start discharge limits thermal stress during sustained overload or output shorts. |
Applications
| Automotive Infotainment | Automotive Clusters |
|---|---|
|
Use Scenario: Powering display logic, audio codecs, and touch controller in head-unit systems. IC Role / Device Role / Timing Role: Dual-output buck supplying 1.8V for DDR interface and 1.2V for ARM core, with independent enable and PG signaling. Use Value: Phase-shifted operation minimizes input ripple on shared 5V rail; AAM mode extends standby time during vehicle sleep mode. |
Use Scenario: Supplying MCU, CAN transceiver, and TFT backlight driver in digital instrument clusters. IC Role / Device Role / Timing Role: Regulating 3.3V for microcontroller and 5V for backlight boost stage, with AEC-Q100 assurance and hiccup protection. Use Value: 100% duty cycle maintains 3.3V output during cold-crank (VIN dip to 2.7V); wettable flank package ensures AOI-compliant assembly. |
| Automotive Telematics | Battery-Powered Devices |
|
Use Scenario: Powering LTE modem, GNSS receiver, and eSIM controller in TCU modules. IC Role / Device Role / Timing Role: Delivering 1.1V for RF IC and 1.8V for baseband processor, with independent soft-start for controlled power-up sequence. Use Value: 60µA quiescent current meets ISO 26262 ASIL-B low-power requirements; PG signals enable firmware-controlled power state transitions. |
Use Scenario: Regulating power rails for handheld test equipment with Li+ battery input. IC Role / Device Role / Timing Role: Providing 3.3V for MCU and 1.2V for ADC, using FCCM mode to suppress light-load ripple in precision measurement circuits. Use Value: Programmable 3MHz switching enables <1mm height inductors; dual-channel integration reduces BOM count and board area by 35% vs. discrete solutions. |
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 |
|---|---|---|---|
| MPQ2169GRH-Z | Higher 4A/2A output capability; same package and pinout; 75µA IQ; supports up to 4MHz fSW | Targeted at higher-power ADAS domain controllers requiring greater current headroom | Select when >2A per channel is required and higher IQ is acceptable; drop-in replacement with no layout change. |
| TPS65218D0RSLR | Integrated PMIC with LDOs, RTC, and battery charger; 1.8V/1.2V fixed outputs; 125µA IQ; 2.7V–5.5V input | Designed for Sitara AM335x/AM437x processors; includes system power management beyond regulation | Choose only if full PMIC functionality (charger, reset, sequencing) is needed; not pin-compatible and lacks AEC-Q100 Grade-1 rating. |
Compared with MPQ2166GRH-Z, MPQ2169GRH-Z offers higher current scalability while retaining automotive qualification and footprint compatibility, whereas TPS65218D0RSLR trades buck flexibility for integrated system power management - making it unsuitable for standalone dual-buck applications requiring AEC-Q100 compliance and minimal IQ.
Availability
MPQ2166GRH-Z is available at Aetrix Electronics and suitable for automotive infotainment, digital instrument clusters, and battery-powered portable instrumentation requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for MPQ2166GRH-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2166 product line delivers dual-channel, AEC-Q100-qualified buck regulators optimized for space-constrained, efficiency-critical automotive and portable applications - emphasizing low IQ, phase-shifted operation, and robust protection.
FAQ
What is the maximum supported switching frequency and how is it configured?
The MPQ2166GRH-Z supports up to 3MHz switching frequency, set either by an external resistor from FREQ to GND (e.g., 51kΩ yields ~3MHz) or by synchronizing to an external clock signal in the 350kHz–3MHz range. The external clock must have clean rising edges (>100ns pulse width) and be active before startup and maintained until shutdown.
How does the 180° phase shift improve system-level performance?
The 180° phase shift between channels reduces input current ripple amplitude by ~70%, allowing smaller input bulk capacitors and lower-cost EMI filtering. This also lowers RMS current stress on input capacitors and improves thermal performance in high-density automotive modules.
Can MPQ2166GRH-Z operate with only one channel enabled?
Yes - EN1 and EN2 are independently controllable. Disabling one channel (ENx ≤ 0.4V) places it in shutdown with <1.5µA leakage, while the active channel continues normal regulation. PGx remains valid only for enabled channels, and phase shift is disabled when only one channel operates.
What is the difference between AAM and FCCM modes, and how is mode selection implemented?
AAM (Advanced Asynchronous Mode) minimizes IQ to 60µA at light/no load by dynamically adjusting switching frequency; FCCM (Forced Continuous Conduction Mode) fixes fSW for predictable ripple and EMI but increases IQ to ~50µA. Mode is selected by pulling CCM ≤0.4V (AAM) or ≥1.6V (FCCM); floating is prohibited.
Is the MPQ2166GRH-Z pin-compatible with other variants in the MPQ2166 family?
Yes - MPQ2166GRH-Z shares identical pinout and footprint with MPQ2166GRH-AEC1 and MPQ2166GRHE-AEC1 (wettable flank). It is not pin-compatible with the smaller QFN-18 (2mm×3mm) variant (MPQ2166GD-Z) due to different pad layout and thermal pad dimensions.
What protection features are integrated and how do they behave under fault conditions?
Integrated protections include cycle-by-cycle over-current limit (4.5A typical), hiccup-mode short-circuit recovery, thermal shutdown (175°C), and input UVLO (2.55V rising). During short-circuit, the device disables switching, discharges SS caps, and retries after cooldown - preventing thermal runaway without external intervention.
Does MPQ2166GRH-Z support output voltages above 0.6V, and what is the adjustment range?
Yes - output is adjustable from 0.6V to 5.5V in AAM mode, and from 0.6V to 0.5×VIN in FCCM mode. Feedback uses a standard resistive divider referenced to the internal 0.6V bandgap, with ±1.2% FB accuracy over -40°C to +125°C.
MPQ2166GRH-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-Z FAQ
1.How can I place an order for MPQ2166GRH-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2166GRH-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-Z reliable?
The price and inventory of MPQ2166GRH-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-Z is usually 5 days.
3.What payment methods are accepted for MPQ2166GRH-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2166GRH-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2166GRH-Z?
MPQ2166GRH-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2166GRH-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-Z?
For technical support, including MPQ2166GRH-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2166GRH-Z requirements.
6.How does Aetrix verify that MPQ2166GRH-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2166GRH-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-Z meets industry standards.
7.What is the process for return or replacement of MPQ2166GRH-Z?
All MPQ2166GRH-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2166GRH-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-Z part is unused and in its original packaging.
Return procedure for MPQ2166GRH-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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