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Monolithic Power Systems Inc. MPQ2178GQHE-11-AEC1-Z
- Part No.:
- MPQ2178GQHE-11-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VFDFN
- Datasheet:
-
MPQ2178GQHE-11-AEC1-Z.pdf
- Description:
- IC REG BUCK 1.1V 2A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ2178GQHE-11-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 2A continuous output at a fixed 1.1V with ±1% regulation accuracy (1.089–1.111V), 2.4MHz switching frequency, and integrated 70mΩ/40mΩ power MOSFETs in a wettable-flank QFN-8 (1.5mm×2mm) package. It supports automotive infotainment and cluster power rails requiring fast transient response, power-good signaling, and soft-start control.
For engineers reviewing the MPQ2178GQHE-11-AEC1-Z datasheet, MPQ2178GQHE-11-AEC1-Z pinout, MPQ2178GQHE-11-AEC1-Z application, or MPQ2178GQHE-11-AEC1-Z equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal performance (−40°C to +150°C), and real-world EMI-compliant operation per CISPR25 Class 5.
Technical Context
The MPQ2178GQHE-11-AEC1-Z employs constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across 2.5V–6V input and full load range, enabling fast load-transient response without external compensation. Its FCCM operation ensures continuous conduction mode for low output ripple and predictable EMI behavior.
It integrates dual internal MOSFETs (70mΩ PCH / 40mΩ NCH), a precision 0.6V reference, power-good comparator with 87–93% VFB threshold, and robust protection including hiccup-mode short-circuit protection, thermal shutdown at 170°C, and output over-voltage protection at 110–120% VFB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.1V ±1% (1.089–1.111V); eliminates external feedback divider and reduces BOM count. |
| Max Output Current | 2A continuous; supports high-current microcontroller cores or FPGA I/O banks in automotive domains. |
| Switching Frequency | 2.4MHz nominal; enables use of compact 1µH inductors and meets CISPR25 Class 5 conducted/radiated EMI limits. |
| Input Voltage Range | 2.5V to 6V; compatible with 3.3V, 5V, and battery-backed automotive rails including cold-crank (≥2.5V). |
| Junction Temp Range | −40°C to +150°C; certified AEC-Q100 Grade 1, suitable for under-hood and instrument cluster mounting. |
| Feedback Accuracy | ±1% at TJ = 25°C; maintains tight regulation across temperature for sensitive analog or RF subsystems. |
| Power Good Threshold | PG asserts when VFB ≥ 90% of 0.6V (i.e., ≥540mV); provides reliable rail-valid signal for system sequencing. |
Pinout & Package
MPQ2178GQHE-11-AEC1-Z is housed in a wettable-flank QFN-8 package (1.5mm × 2mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and solder-joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power-good indicator | Pulled high via external resistor when VFB ≥ 540mV; sinks current when VFB drops below 510mV; float if unused. |
| 2 - VIN | Main input supply | Accepts 2.5V–6V; requires local ceramic decoupling to suppress switching noise and input transients. |
| 3 - SW | Switching node | Drain of internal high-side P-MOSFET; connects directly to inductor; critical for layout EMI control. |
| 4 - GND | Power and signal ground | Common return for all internal circuits; must be tied to low-impedance PCB ground plane. |
| 5 - EN | Enable control input | Logic-high ≥0.9V enables operation; logic-low ≤0.65V disables; internal 2MΩ pull-down ensures default-off state. |
| 6 - SS | Soft-start timing control | Charged by internal 3µA current source; CSS ≥1nF sets controlled VOUT ramp time to prevent inrush. |
| 7 - OUT | Regulated output voltage | Delivers 1.1V to load; requires bulk and high-frequency ceramic capacitors for stability and ripple suppression. |
| 8 - FB | Feedback input | Floating on fixed-output variants; not connected externally-internal resistor divider sets 1.1V output. |
Key Features
| Feature | Design Value |
|---|---|
| MPSafe™ QM Functional Safety Documentation | Available for ISO 26262 ASIL-B system integration; supports safety case development without hardware modification. |
| MeshConnect™ Flip-Chip Packaging | Reduces parasitic inductance and thermal resistance (θJC = 25°C/W), improving EMC performance and thermal headroom. |
| 100% Duty Cycle Operation | Enables dropout operation down to VIN − VOUT ≈ 0.5V, critical for maintaining 1.1V rail during automotive cold-crank events. |
| Integrated Output Discharge | Internal MOSFET actively discharges COUT when disabled, preventing floating outputs and ensuring clean power-down sequencing. |
| FCCM Across Full Load | Eliminates audible switching frequency variation and ensures consistent EMI signature from light-load to 2A full-load. |
Applications
| Automotive Infotainment Head Unit | Instrument Cluster Display |
|---|---|
|
Use Scenario: Powers ARM Cortex-A72 application processor core and DDR3L memory interface in head unit modules. IC Role / Device Role / Timing Role: Primary 1.1V core regulator with PG signaling for boot sequence coordination and fault reporting. Use Value: 2.4MHz switching allows <1.5mm² total passive area; AEC-Q100 qualification ensures 15-year field reliability in 85°C ambient environments. |
Use Scenario: Supplies 1.1V to TFT-LCD timing controller and display driver IC in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output buck converter with soft-start and power-good for deterministic display initialization. Use Value: ±1% output accuracy prevents gamma curve drift; wettable flank QFN enables AOI verification for zero-defect automotive manufacturing. |
| ADAS Camera Module SoC | Automotive Telematics Control Unit |
|
Use Scenario: Delivers 1.1V to image signal processor (ISP) and MIPI CSI-2 serializer in rear-view camera modules. IC Role / Device Role / Timing Role: Low-noise, EMI-compliant power stage meeting CISPR25 Class 5 for placement near RF antennas. Use Value: FCCM operation avoids beat frequencies with camera pixel clocks; 150°C junction rating supports sealed module packaging. |
Use Scenario: Provides 1.1V rail to LTE modem baseband processor and GNSS receiver in telematics units. IC Role / Device Role / Timing Role: Automotive-grade DC/DC with EN-controlled sequencing and PG confirmation for multi-rail power management. Use Value: Integrated discharge prevents back-powering during ignition cycling; -40°C to +150°C operation covers full vehicle thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2178GQHE-12-AEC1-Z | Fixed 1.2V output (±1%), identical package, pinout, and specs otherwise. | Requires redesign of downstream 1.2V-tolerant loads; unsuitable where 1.1V is mandated by SoC spec. | Select only if target SoC explicitly requires 1.2V core voltage and validation confirms compatibility. |
| TI TPS6286418RTER | 1.8V fixed output, 3A rating, 4MHz switching, QFN-9 (1.5mm×2mm), AEC-Q100 Grade 1. | Higher voltage and current; incompatible for 1.1V systems; larger footprint due to extra pin. | Not a drop-in replacement; consider only for new designs targeting 1.8V rails with higher current margin. |
Compared with MPQ2178GQHE-11-AEC1-Z, the -12 variant offers identical form-factor and reliability but shifts regulation to 1.2V-requiring full electrical validation-while the TPS6286418RTER trades voltage accuracy and pin compatibility for higher current and frequency, increasing design risk in 1.1V-constrained automotive modules.
Availability
MPQ2178GQHE-11-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, ADAS camera, and telematics applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MPQ2178GQHE-11-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-efficiency, high-reliability power management ICs for automotive, industrial, and consumer markets.
The MPQ2178 product line delivers AEC-Q100-qualified, COT-controlled buck converters optimized for space-constrained automotive subsystems demanding low EMI, precise voltage regulation, and functional safety readiness.
FAQ
What is the exact output voltage tolerance for MPQ2178GQHE-11-AEC1-Z?
The device delivers a fixed 1.1V output with ±1% tolerance (1.089V to 1.111V) over −40°C to +150°C junction temperature and full load range, as specified in the Electrical Characteristics table on page 6 of the Rev. 1.1 datasheet.
Does MPQ2178GQHE-11-AEC1-Z require external feedback resistors?
No. The "-11" suffix denotes a factory-trimmed fixed 1.1V output version; the FB pin is internally connected and must be left floating-no external resistor divider is needed or permitted.
How is soft-start configured for this fixed-output variant?
Soft-start is controlled via the SS pin using an external capacitor (CSS ≥1nF). The internal charge current is 3µA, yielding tSS (ms) = (CSS in nF × 0.6) / 3. This ensures monotonic VOUT ramp without overshoot during startup.
What thermal performance can be expected on a standard 4-layer board?
On the EVQ2178-QH-00A evaluation board (6.3cm×6.3cm, 2oz copper, 4-layer), θJA is 59°C/W and θJC is 14°C/W. At 2A load and 25°C ambient, junction temperature rise is ~118°C, staying within the 150°C limit.
Is the PG pin compatible with 3.3V logic systems?
Yes. PG is open-drain and rated for up to 6V pull-up. When used with a 10kΩ resistor to 3.3V, it delivers clean high/low transitions with <0.4V drop at 1mA sink, fully interoperable with standard automotive MCU GPIOs.
Does this part support pre-biased start-up?
Yes. The MPQ2178GQHE-11-AEC1-Z supports pre-biased output conditions: when EN is asserted, the internal control loop actively regulates even if VOUT is already present at 1.1V, avoiding reverse current or latch-up.
What protection features are active during short-circuit events?
Short-circuit protection triggers hiccup mode: after detecting >1.2A reverse current through the low-side FET, the device shuts down for ~3ms, then retries. Thermal shutdown (170°C) and output over-voltage (110–120% VFB) provide layered fault coverage.
MPQ2178GQHE-11-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-VFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.1V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 8-QFN (2x1.5)
MPQ2178GQHE-11-AEC1-Z FAQ
1.How can I place an order for MPQ2178GQHE-11-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2178GQHE-11-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 MPQ2178GQHE-11-AEC1-Z reliable?
The price and inventory of MPQ2178GQHE-11-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 MPQ2178GQHE-11-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2178GQHE-11-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2178GQHE-11-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2178GQHE-11-AEC1-Z?
MPQ2178GQHE-11-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2178GQHE-11-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 MPQ2178GQHE-11-AEC1-Z?
For technical support, including MPQ2178GQHE-11-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2178GQHE-11-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2178GQHE-11-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2178GQHE-11-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 MPQ2178GQHE-11-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2178GQHE-11-AEC1-Z?
All MPQ2178GQHE-11-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2178GQHE-11-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 MPQ2178GQHE-11-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2178GQHE-11-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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