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Monolithic Power Systems Inc. MPQ2166AGRHE-AEC1-P
- Part No.:
- MPQ2166AGRHE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 18-PowerVFQFN
- Datasheet:
-
MPQ2166AGRHE-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ DL 18QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,530
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Product details
Overview
MPQ2166AGRHE-AEC1-P from Monolithic Power Systems is a dual-channel, AEC-Q100 Grade-1 qualified synchronous buck regulator supporting 2A/2A or 3A/1A output configurations, operating from 2.7V–6V input with 0.6V–5.5V adjustable output, 65µA quiescent current, and integrated 55mΩ/20mΩ MOSFETs - deployed in automotive infotainment and instrument clusters for single-cell Li+-powered systems.
For engineers reviewing the MPQ2166AGRHE-AEC1-P datasheet, MPQ2166AGRHE-AEC1-P pinout, MPQ2166AGRHE-AEC1-P application, or MPQ2166AGRHE-AEC1-P equivalent, key selection criteria include AEC-Q100 qualification, dual-channel 180° phase-shift operation, configurable AAM/FCCM mode, external sync up to 3MHz, and wettable flank QFN-18 package for automotive-grade solder joint inspection.
Technical Context
The MPQ2166A uses peak current mode control with internal compensation per channel, enabling fast transient response and cycle-by-cycle over-current protection. Its dual PWM controllers operate with 180° phase shift to minimize input ripple and support independent soft-start (SS1/SS2) and power-good (PG1/PG2) signals for each rail.
It integrates high-side and synchronous rectifier MOSFETs (55mΩ HS / 20mΩ LS), supports 100% duty cycle in low-dropout AAM mode, and features selectable modulation: Advanced Asynchronous Modulation (AAM) for light-load efficiency or Forced Continuous Conduction Mode (FCCM) for fixed-frequency, low-noise operation - with VOUT limited to 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 system rails without pre-regulation. |
| Output Current Config | 2A/2A or 3A/1A - enables flexible power partitioning for asymmetric loads like SoC + memory or MCU + sensor rails. |
| Quiescent Current | 65µA - enables >10-year battery standby in always-on automotive modules (e.g., telematics wake-up circuits). |
| Switching Frequency | Configurable up to 3MHz via FREQ pin resistor or external sync - allows compact 0.68µH inductors and reduces EMI filtering burden. |
| Efficiency Peak | >90% at mid-load - achieved via integrated 55mΩ/20mΩ MOSFETs and synchronous rectification, eliminating Schottky losses. |
| Protection Features | Cycle-by-cycle OCP, hiccup-mode SCP, thermal shutdown (175°C), and PG fault signaling - meets ASIL-B functional safety readiness. |
| AEC-Q100 Grade | Grade-1 (−40°C to +125°C TJ) - qualified for under-hood and dashboard-mounted automotive applications. |
Pinout & Package
MPQ2166AGRHE-AEC1-P is housed in a wettable flank QFN-18 package (2.5mm × 3.5mm, 0.5mm pitch), optimized for automated optical inspection (AOI) of solder joints in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | PG2, PG1 | Open-drain power-good indicators - require external pull-up; assert high when respective FB voltage exceeds 90% of 0.6V reference. |
| 2, 14 | PGND2, PGND1 | Separate power ground pins per channel - must be externally tied to minimize ground bounce between high-current paths. |
| 3, 13 | SW2, SW1 | Switch node terminals - connect directly to inductor; high di/dt paths demand short, wide copper traces and local decoupling. |
| 4, 12 | VIN2, VIN1 | Dedicated input supplies per channel - each requires ≥10µF ceramic capacitor placed adjacent to pin for high-frequency noise suppression. |
| 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 - sense output voltage via resistive divider; referenced to internal 0.6V bandgap for ±1.2% regulation accuracy. |
| 7 | AGND | Analog ground - must be connected externally to both PGND1 and PGND2 to prevent noise coupling into error amplifiers. |
| 8 | VCC | Internal bias supply - tied externally to VIN1/VIN2; requires 0.1µF–1µF decoupling to AGND for stable gate drive. |
| 9 | CCM | Mode control - logic-high enables FCCM (fixed frequency); logic-low enables AAM (efficiency-optimized burst mode). |
| 16, 18 | EN1, EN2 | Independent enable inputs - active-high (1.6V threshold); must not float to avoid undefined startup behavior. |
| 17 | FREQ | Frequency set/sync input - resistor-to-ground sets oscillator; accepts external 350kHz–3MHz clock for EMI reduction via spread-spectrum alignment. |
Key Features
| Feature | Design Value |
|---|---|
| 180° phase-shift operation | Reduces input RMS current by ~30%, allowing smaller input bulk capacitors and lower EMI filter component count. |
| Wettable flank QFN-18 | Enables automated solder joint inspection (AOI) per IPC-A-610 Class 3 requirements for automotive production traceability. |
| External sync up to 3MHz | Permits synchronization to system master clock or spread-spectrum source to avoid beat frequencies in multi-rail power domains. |
| Adjustable soft-start | Capacitor-programmable SS1/SS2 allows staggered rail sequencing - critical for SoC core/memory power-up timing compliance. |
| Valley current detection | Prevents sub-harmonic oscillation and enables accurate short-circuit detection during light-load AAM operation. |
Applications
| Automotive Infotainment | Automotive Instrument Cluster |
|---|---|
|
Use Scenario: Powering display processor, audio codec, and touch controller in head-unit systems with strict EMC and thermal constraints. IC Role / Device Role / Timing Role: Dual-channel buck supplying 1.1V core and 3.3V I/O rails with 180° phase shift to suppress conducted emissions on shared 5V input bus. Use Value: 91% peak efficiency at 1.5A load reduces thermal pad temperature rise to <12°C (per 2A channel), avoiding fan cooling in sealed enclosures. |
Use Scenario: Regulating LCD backlight driver and microcontroller supply in digital dashboards exposed to −40°C to +105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 Grade-1 dual regulator delivering 5V (3A) for backlight and 1.8V (2A) for cluster MCU with independent PG monitoring. Use Value: 65µA IQ enables >15-year battery backup for real-time clock during vehicle sleep mode without parasitic drain. |
| Automotive Telematics | Battery-Powered Portable Instruments |
|
Use Scenario: Power management for LTE/C-V2X modules requiring clean, sequenced 1.2V, 1.8V, and 3.3V rails in compact telematics control units (TCUs). IC Role / Device Role / Timing Role: Dual buck with SS1/SS2 programmability ensures controlled power-up sequence matching modem boot requirements. Use Value: External sync capability aligns switching edges with baseband processor clock, reducing cross-talk-induced data errors in RF-sensitive layouts. |
Use Scenario: Compact handheld test equipment powered by 3.7V Li-ion battery needing isolated, low-noise analog and digital supplies. IC Role / Device Role / Timing Role: Configured as 3A/1A to deliver high-current analog front-end (AFE) bias and low-noise 1.8V digital core with independent PG status. Use Value: AAM mode achieves 86% efficiency at 10mA load - doubling runtime versus FCCM in intermittent measurement duty cycles. |
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 |
|---|---|---|---|
| TPS650361RGER | 3.0V–5.5V input, fixed 1.2V/3.3V outputs, no external frequency sync, 125°C max junction temp. | Lacks AEC-Q100 qualification and wettable flank package; suited for industrial, not automotive. | Select only if AEC-Q100 and AOI-compliant packaging are unnecessary and fixed-output simplicity is prioritized. |
| RTQ2131B-QA | 2.7V–6V input, 2A/2A only, 1.2MHz fixed frequency, no AAM mode, 60µA IQ, QFN-16. | Lower integration: no external sync, no 180° phase shift, no valley current detection for SCP. | Choose when cost sensitivity outweighs need for light-load efficiency optimization and EMI control flexibility. |
Compared with TPS650361RGER and RTQ2131B-QA, MPQ2166AGRHE-AEC1-P uniquely combines AEC-Q100 Grade-1 qualification, wettable flank packaging, 180° phase shift, and dual-mode (AAM/FCCM) operation - making it the only option qualified for safety-critical automotive power rails requiring both reliability and design flexibility.
Availability
MPQ2166AGRHE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and telematics applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MPQ2166AGRHE-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 power management ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and LED lighting solutions.
The MPQ2166A belongs to MPS's automotive-grade synchronous buck regulator product line, designed specifically for AEC-Q100-compliant power delivery in infotainment, ADAS, and body electronics where efficiency, small size, and robust protection are mandatory.
FAQ
What is the maximum allowable output voltage in FCCM mode?
In Forced Continuous Conduction Mode (FCCM), the MPQ2166AGRHE-AEC1-P limits regulated output voltage to 0.5 × VIN to ensure stable operation and avoid control loop instability. For example, with VIN = 5V, VOUT must not exceed 2.5V in FCCM. This constraint does not apply in AAM mode, where VOUT is adjustable from 0.6V to 5.5V.
How is 180° phase shift implemented between channels?
The MPQ2166A uses an internal PLL-based clock generator that drives Channel 1 and Channel 2 with precisely 180° phase offset. When synchronized externally via the FREQ pin, only Channel 1 locks to the external clock edge; Channel 2 automatically maintains the 180° relationship, reducing input ripple without requiring external timing components.
Can EN1 and EN2 be tied together for simultaneous channel control?
Yes - EN1 and EN2 may be connected to a common enable signal, provided the driving source meets the 1.6V turn-on and 0.4V turn-off thresholds and can sink/source sufficient current. However, independent control is recommended for power sequencing in complex SoC systems where core and I/O rails require staggered startup.
What is the purpose of the AGND pin, and how should it be routed?
AGND serves as the reference for internal error amplifiers and bandgap circuitry. It must be connected externally to both PGND1 and PGND2 using a low-impedance copper pour - not via thin traces - to prevent noise coupling from high di/dt power grounds into sensitive analog nodes, which could cause regulation inaccuracy or instability.
Does the device support output capacitor ESR monitoring for health diagnostics?
No - the MPQ2166AGRHE-AEC1-P does not include ESR monitoring or telemetry features. Its protection relies on cycle-by-cycle current limiting, thermal shutdown, and PG flag assertion based on FB voltage thresholds. Output capacitor health must be verified externally via periodic impedance testing or system-level voltage margining.
What is the minimum off-time specification, and why does it matter?
The minimum off-time is 50ns, a hard limit imposed by internal gate driver timing. This constrains the lowest achievable output voltage at high input voltages (e.g., VIN = 6V) when operating at high frequencies (≥2MHz), as tOFF(MIN) limits the maximum duty cycle and thus the practical VOUT floor in FCCM mode.
Is the wettable flank feature compatible with standard reflow profiles?
Yes - the MPQ2166AGRHE-AEC1-P's wettable flank QFN-18 package is qualified for standard lead-free reflow profiles (J-STD-20D, peak 260°C). The flank plating ensures reliable solder fillet formation visible under AOI, meeting IPC-A-610E Class 3 requirements for automotive electronics without process modification.
MPQ2166AGRHE-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:
- 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-P FAQ
1.How can I place an order for MPQ2166AGRHE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-P reliable?
The price and inventory of MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ2166AGRHE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2166AGRHE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2166AGRHE-AEC1-P?
MPQ2166AGRHE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-P?
For technical support, including MPQ2166AGRHE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2166AGRHE-AEC1-P requirements.
6.How does Aetrix verify that MPQ2166AGRHE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ2166AGRHE-AEC1-P?
All MPQ2166AGRHE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2166AGRHE-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 MPQ2166AGRHE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ2166AGRHE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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