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Monolithic Power Systems Inc. MPQ2178AGQHE-AEC1-Z
- Part No.:
- MPQ2178AGQHE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VFDFN
- Datasheet:
-
MPQ2178AGQHE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
MPQ2178AGQHE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 2A continuous output current across a 2.5V–6V input range, with 0.6V adjustable or factory-fixed output options (e.g., 0.8V, 1.2V), 2.4MHz switching frequency, and integrated power MOSFETs (70mΩ PCH / 40mΩ NCH). It serves as a primary voltage regulator in automotive infotainment and cluster power rails.
For engineers reviewing the MPQ2178AGQHE-AEC1-Z datasheet, MPQ2178AGQHE-AEC1-Z pinout, MPQ2178AGQHE-AEC1-Z application, or MPQ2178AGQHE-AEC1-Z equivalent, key selection criteria include its COT control architecture for fast transient response, wettable-flank QFN-8 (1.5mm×2mm) package for automated optical inspection, AEC-Q100 qualification, and integrated PG/SS/EN functions for automotive power sequencing.
Technical Context
The MPQ2178AGQHE-AEC1-Z employs constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across full load and input ranges, enabling FCCM operation and eliminating external compensation. Its internal high-side P-channel and low-side N-channel MOSFETs support 100% duty cycle for ultra-low dropout operation.
Functional safety support includes MPSafe™ QM documentation, while protection features-cycle-by-cycle current limiting, thermal shutdown (170°C), output over-voltage (115% VFB), short-circuit hiccup mode, and power-good monitoring-enable robust deployment in automotive domains requiring ASIL-B awareness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports direct connection to automotive battery (cold-crank down to 2.5V) without pre-regulation. |
| Output Current | 2A continuous - sufficient for powering SoCs, FPGAs, or multi-rail PMICs in telematics modules. |
| Switching Frequency | 2.4MHz ±10% - enables use of compact 1µH inductors and reduces EMI filter size for CISPR-25 Class 5 compliance. |
| Feedback Accuracy | ±1% at TJ = 25°C (±1.5% over –40°C to +150°C) - ensures tight regulation for sensitive analog/digital cores. |
| Junction Temp Range | –40°C to +150°C - validated for under-hood and dashboard-mounted automotive applications per AEC-Q100 Grade 1. |
| Power Good Threshold | 90% VFB rising / 85% VFB falling - provides precise rail validation with 5% hysteresis to prevent chatter during brown-out recovery. |
| Soft-Start Control | External capacitor-programmable (1nF min) - eliminates inrush current and enables controlled power-up sequencing with µs-level resolution. |
Pinout & Package
MPQ2178AGQHE-AEC1-Z is housed in a wettable-flank QFN-8 package (1.5mm × 2mm, 0.5mm pitch), optimized for solder-joint inspection and thermal performance (θJA = 59°C/W on 4-layer EV board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power-good indicator | Pulled high when VFB ≥ 90% VREF; pulled low if VFB ≤ 85% VREF - enables system-level rail monitoring and fault flagging. |
| 2 - VIN | Main input supply | Accepts 2.5V–6V; requires local ceramic decoupling to suppress high-frequency switching noise and input transients. |
| 3 - SW | Switching node | Drain of internal PCH MOSFET; connects directly to inductor - critical high-dI/dt path requiring minimized loop area. |
| 4 - GND | Power and signal ground | Common reference for all internal circuits; must be tied to low-impedance PCB ground plane beneath the package. |
| 5 - EN | Enable control | Logic-compatible input (0.65V low / 0.9V high thresholds); internal 2MΩ pull-down enables default-disable behavior. |
| 6 - SS | Soft-start timing | Current-sourced node (3µA typ.) - capacitor value sets monotonic VOUT ramp time to prevent overshoot and inrush. |
| 7 - OUT | Regulated output | Delivers final power rail; connects to output capacitor and load - low-ESR ceramic cap required for ripple suppression. |
| 8 - FB | Feedback sense | Resistor-divider tap point for adjustable versions; floated for fixed-output variants - sets VOUT = 0.6V × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 70mΩ PCH + 40mΩ NCH MOSFETs - eliminates external switch losses and reduces BOM count by 4 components vs. controller-based solutions. |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +150°C operation with lifetime reliability testing - meets automotive power system requirements without derating. |
| MeshConnect™ Flip-Chip Packaging | Wettable-flank QFN-8 - enables AOI-compatible solder joint inspection and improves thermal conduction to PCB copper layers. |
| FCCM Operation | Forced Continuous Conduction Mode across full load - eliminates audible noise and maintains stable EMI profile during light-load conditions. |
| Pre-Biased Start-Up | Supports hot-plug and rail-sharing scenarios - regulates correctly even when VOUT is pre-charged before EN assertion. |
| Output Discharge | Internal discharge MOSFET (150Ω typical) - actively bleeds residual charge from COUT during shutdown to prevent back-powering downstream circuitry. |
Applications
| Automotive Infotainment | Camera Module Power |
|---|---|
|
Use Scenario: Powering SoC, DDR memory, and display interface in head-unit systems operating across cold-crank (2.5V) to load-dump (6V) conditions. IC Role / Device Role / Timing Role: Primary buck regulator generating 1.2V core and 3.3V I/O rails with tight load regulation (<±0.2%) and fast transient response (<10µs). Use Value: Maintains system stability during engine start-stop cycles and prevents processor reset due to rail collapse. |
Use Scenario: Supplying image sensor and ISP in ADAS front/rear cameras mounted near vehicle exterior. IC Role / Device Role / Timing Role: Compact 1.8V/1.2V regulator with 2.4MHz switching to minimize EMI coupling into analog video paths. Use Value: Enables use of small 1µH inductors and meets CISPR-25 Class 5 radiated emissions limits without shielding. |
| Automotive Cluster Display | Telematics Control Unit (TCU) |
|
Use Scenario: Generating multiple low-noise rails (e.g., 1.1V, 1.8V) for TFT-LCD driver ICs and microcontroller in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output variant (e.g., MPQ2178GQHE-11-AEC1-Z) providing 1.1V with ±1.2% accuracy over temperature. Use Value: Eliminates external feedback resistors and reduces layout sensitivity to parasitic capacitance. |
Use Scenario: Powering LTE/C-V2X modem, GNSS receiver, and secure MCU in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: High-efficiency (≥92% at 1A, VIN=3.3V) buck converter with PG signal for safe boot sequence coordination. Use Value: Ensures modem initialization only after stable 1.2V rail is confirmed, preventing firmware lockup during power-up. |
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 |
|---|---|---|---|
| TPS62840DLCR | Lower IQ (300nA vs. 650µA), but 1A max output and no AEC-Q100 qualification. | Suitable for ultra-low-power body electronics, not under-hood or safety-critical domains. | Select only for non-automotive portable applications where quiescent current dominates efficiency trade-offs. |
| LM61480QRNXTQ1 | Higher 8A rating, 2.1MHz fSW, and spread-spectrum EMI reduction - larger QFN-16 package (3mm×3mm). | Targets higher-power ADAS ECUs; lacks wettable flanks and has higher minimum external component count. | Choose when >2A output or enhanced EMI mitigation is required, accepting larger footprint and cost premium. |
Compared with TPS62840DLCR and LM61480QRNXTQ1, MPQ2178AGQHE-AEC1-Z uniquely balances AEC-Q100 Grade 1 compliance, ultra-compact wettable-flank packaging, and integrated PG/SS in a 2A solution - making it optimal for space-constrained, thermally demanding automotive modules where qualification and manufacturability are non-negotiable.
Availability
MPQ2178AGQHE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, camera modules, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ2178AGQHE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2178 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for ASIL-B-aware systems in infotainment, ADAS, and body electronics - emphasizing AEC-Q100 qualification, functional safety documentation, and EMI-optimized integration.
FAQ
What is the maximum junction temperature and thermal shutdown threshold?
The MPQ2178AGQHE-AEC1-Z is rated for a maximum junction temperature of +150°C and triggers thermal shutdown at 170°C with 20°C hysteresis. This allows sustained operation up to its AEC-Q100 Grade 1 limit while protecting against catastrophic failure during overload or poor heatsinking.
Does the device support pre-biased start-up, and how does it behave?
Yes - the MPQ2178AGQHE-AEC1-Z supports pre-biased start-up. When EN is asserted, the internal control logic actively sinks current from the FB node to discharge any pre-existing output voltage, then ramps VOUT up via the SS pin. This prevents reverse current flow and ensures reliable boot in shared-rail or hot-swap configurations.
How is power-good (PG) functionality implemented, and what external components are needed?
PG is an open-drain output requiring an external pull-up resistor (typically 10kΩ to 5V or 3.3V). It asserts high when VFB exceeds 90% of the 0.6V internal reference and pulls low when VFB drops below 85%. No additional filtering or debouncing is required for standard automotive sequencing.
What are the soft-start capacitor requirements for different output versions?
For adjustable and 1.1V/1.2V/1.8V fixed versions, use ≥1nF CSS with 3µA ISS; for 0.8V and 1.25V versions, use ≥5.3nF CSS with 16µA ISS. Minimum values ensure tSS ≥ 200µs, preventing inrush while maintaining fast enough startup for automotive wake-up timing budgets.
Is the MPQ2178AGQHE-AEC1-Z compatible with standard reflow profiles?
Yes - the QFN-8 wettable-flank package is qualified for JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1), supporting standard lead-free reflow profiles (peak 260°C). The wettable flanks enable automated optical inspection of solder fillets without X-ray.
How does the constant-on-time (COT) control improve transient response compared to PWM?
COT eliminates the need for error amplifier compensation, reducing loop delay. With VIN feed-forward, on-time scales inversely with input voltage, yielding near-constant frequency and sub-10µs recovery from 50% load steps - critical for powering burst-mode processors in infotainment SoCs.
Can the device operate in 100% duty cycle mode, and under what conditions?
Yes - the MPQ2178AGQHE-AEC1-Z supports 100% duty cycle when VOUT approaches VIN (e.g., VIN = 3.3V, VOUT = 3.0V), enabling ultra-low dropout operation during cold-crank events. This is enabled automatically by the COT control logic when the minimum off-time timer expires without FB crossing threshold.
MPQ2178AGQHE-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 8-QFN (2x1.5)
MPQ2178AGQHE-AEC1-Z FAQ
1.How can I place an order for MPQ2178AGQHE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-Z reliable?
The price and inventory of MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2178AGQHE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2178AGQHE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2178AGQHE-AEC1-Z?
MPQ2178AGQHE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-Z?
For technical support, including MPQ2178AGQHE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2178AGQHE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2178AGQHE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2178AGQHE-AEC1-Z?
All MPQ2178AGQHE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2178AGQHE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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