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Monolithic Power Systems Inc. MPQ2178GQHE-AEC1-Z
- Part No.:
- MPQ2178GQHE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VFDFN
- Datasheet:
-
MPQ2178GQHE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,600
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Product details
Overview
MPQ2178GQHE-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 adjustable or fixed-output options (e.g., 0.8V, 1.1V, 1.2V), 0.6V feedback reference, and integrated 70mΩ/40mΩ power MOSFETs. It serves as a primary voltage regulator in automotive infotainment, clusters, and telematics systems requiring high efficiency, compact size, and functional safety support.
For engineers reviewing the MPQ2178GQHE-AEC1-Z datasheet, MPQ2178GQHE-AEC1-Z pinout, MPQ2178GQHE-AEC1-Z application, or MPQ2178GQHE-AEC1-Z equivalent, key selection criteria include its 2.4MHz switching frequency for EMI reduction, COT control for fast transient response, Power Good (PG) indicator with 90% VREF threshold, soft-start programmability via external capacitor, and wettable-flank QFN-8 package for automated optical inspection.
Technical Context
The MPQ2178GQHE-AEC1-Z employs constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across input and load variations, enabling FCCM operation and eliminating need for external compensation. Its internal P-channel (70mΩ) and N-channel (40mΩ) MOSFETs support 100% duty cycle for low-dropout regulation down to 0.6V output.
Fault protection includes cycle-by-cycle current limiting (3.5A peak / 2A valley), thermal shutdown at 170°C, output over-voltage protection (115% VFB), short-circuit hiccup mode, and PG monitoring with 5% hysteresis. The device operates from –40°C to +150°C junction temperature and meets CISPR25 Class 5 conducted/radiated EMI limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports wide automotive battery rail variation including cold-crank (≈4.5V) and load-dump (≤6V) conditions. |
| Output Current | 2A continuous - sufficient for powering SoCs, DSPs, or multi-rail subsystems in automotive clusters without external boost. |
| Switching Frequency | 2.4MHz ±10% - enables use of small 1μH inductors and reduces EMI fundamental below AM band; FCCM ensures consistent timing under light loads. |
| Feedback Reference | 600mV ±1% - sets precise output regulation; allows 0.6V minimum VOUT and supports standard 1.2V/1.8V rails via resistor divider or fixed-output variants. |
| Power Good Threshold | 90% of VFB rising, 85% falling - provides clean, hysteresis-stabilized enable signal for downstream logic sequencing and fault detection. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects silicon during sustained overload or poor PCB thermal design while allowing recovery without manual reset. |
| Soft-Start Current | 3µA (adjustable version) - determines tSS = (CSS × 0.6V)/ISS; 1nF CSS yields ~200ms startup, preventing inrush into large output capacitors. |
Pinout & Package
MPQ2178GQHE-AEC1-Z is housed in a wettable-flank QFN-8 package (1.5mm × 2mm, 0.5mm pitch), optimized for automated optical inspection and thermal performance (θJC = 25°C/W). The ultra-compact footprint supports high-density automotive PCB layouts.
| 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 - used for system power sequencing 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 | Switch node | Drain of internal high-side P-MOSFET; connects directly to inductor - critical for EMI layout and thermal path to exposed pad. |
| 4 - GND | Power and signal ground | Common return for all internal circuits; must be tied to thermal pad and external ground plane for optimal thermal and noise performance. |
| 5 - EN | Enable control | Digital input with 0.9V turn-on / 0.65V turn-off thresholds and internal 2MΩ pull-down - enables controlled power-up/down and sleep-mode entry. |
| 6 - SS | Soft-start timing | Sinks 3µA current to charge external capacitor - sets monotonic VOUT ramp rate and prevents overshoot during startup. |
| 7 - OUT | Regulated output | Delivers final power rail; connects to output capacitor and load - also serves as sense point for discharge MOSFET during shutdown. |
| 8 - FB | Feedback input | Compares resistive divider output to 600mV reference - floating in fixed-output versions; sets VOUT = 0.6V × (1 + R1/R2) in adjustable mode. |
Key Features
| Feature | Design Value |
|---|---|
| MPSafe™ QM Functional Safety Documentation | Provides ASIL-ready documentation package for ISO 26262 system-level integration without requiring full ASIL-B hardware certification. |
| MeshConnect™ Flip-Chip Packaging | Reduces parasitic inductance and improves thermal conduction from die to PCB - enhances EMI performance and power density. |
| Integrated Compensation Network | Eliminates need for external Type-II/III compensation components - simplifies design, reduces BOM count, and accelerates time-to-test. |
| Output Discharge Function | Activates internal discharge MOSFET on disable - safely bleeds stored energy from output capacitor to prevent residual voltage hazards during hot-swap or maintenance. |
| AEC-Q100 Grade 1 Qualification | Validated for operation from –40°C to +150°C ambient - meets automotive engine bay and infotainment module reliability requirements. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module |
|---|---|
Use Scenario: Powers application processor, display interface, and audio codec in centralized head unit with strict EMI limits. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V buck regulator supplying SoC core and I/O rails; PG signals processor reset release after stable VOUT. Use Value: 2.4MHz switching avoids AM/FM bands; FCCM ensures clean idle-state ripple; wettable flank enables AOI for zero-defect manufacturing. | Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera with minimal board space. IC Role / Device Role / Timing Role: Compact 1.1V/1.2V point-of-load regulator; SS-controlled startup prevents sensor latch-up during ignition cycling. Use Value: QFN-8 (1.5×2mm) footprint fits tight camera PCBs; COT control delivers <10µs transient recovery for dynamic lighting changes. |
| Automotive Digital Cluster | Telematics Control Unit (TCU) |
Use Scenario: Generates 3.3V and 1.2V rails for microcontroller, graphics driver, and CAN transceiver in digital instrument cluster. IC Role / Device Role / Timing Role: Dual-rail support via multiple fixed-output variants; EN pin synchronized to vehicle wake-up CAN message. Use Value: -40°C to +150°C operation ensures reliability behind dashboard glass; PG confirms rail stability before GUI initialization. | Use Scenario: Powers LTE modem, GNSS receiver, and secure MCU in cellular-connected TCU operating continuously in parked mode. IC Role / Device Role / Timing Role: High-efficiency 2.5V/3.3V regulator with ultra-low quiescent current (650µA typ) and shutdown current <1µA. Use Value: 2A capability supports burst LTE transmission; thermal shutdown protects against enclosure overheating during extended data sessions. |
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 |
|---|---|---|---|
| MPQ2177GQHE-AEC1-Z | 1.5A output, identical 2.4MHz COT architecture, same QFN-8 package and pinout | Lower current rating limits use to sub-1.5A rails (e.g., MCU cores only); not suitable for SoC I/O or display drivers | Select when 1.5A suffices and cost optimization is prioritized over margin. |
| TI TPS6286418RTER | 2A, 2.25MHz, DCS-Control, 1.8V fixed output, 1.5mm × 2mm QFN but non-wettable flank | Lacks AEC-Q100 Grade 1 qualification and PG pin; lower thermal performance due to standard QFN | Consider only for non-automotive industrial applications where qualification and AOI are not required. |
Compared with MPQ2177GQHE-AEC1-Z, the MPQ2178GQHE-AEC1-Z provides 33% higher current headroom for future-proofing; versus TPS6286418RTER, it delivers certified automotive reliability, PG signaling, and wettable-flank manufacturability - critical for Tier 1 production.
Availability
MPQ2178GQHE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and telematics control units requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for MPQ2178GQHE-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 distribution through authorized partners.
The MPQ2178 belongs to MPS's automotive-grade MPQ series, engineered specifically for demanding automotive subsystems requiring AEC-Q100 qualification, functional safety readiness, and robust EMC performance in cramped PCB environments.
FAQ
What is the minimum recommended soft-start capacitance for MPQ2178GQHE-AEC1-Z?
The minimum soft-start capacitance is 1nF for the adjustable-output version. With a typical ISS of 3µA, this yields a soft-start time of approximately 200ms (tSS = (CSS × 0.6V) / ISS). Using smaller values risks output overshoot; larger values extend startup unnecessarily but improve inrush control.
Does MPQ2178GQHE-AEC1-Z support pre-biased start-up?
Yes - the MPQ2178GQHE-AEC1-Z supports pre-biased start-up. When EN is asserted, the internal control loop actively regulates even if the OUT pin already holds a voltage close to the target. This prevents reverse current flow and avoids disrupting powered-down subsystems sharing the same rail.
How does the Power Good (PG) pin behave during undervoltage or overvoltage events?
PG asserts high when VFB reaches ≥90% of the 600mV reference and remains high until VFB drops ≤85% of VREF. During output UV/OV faults, PG pulls low within microseconds. If PG is left floating, the pin is inactive; it requires an external pull-up resistor (typically 10–100kΩ) to a valid logic voltage.
Can MPQ2178GQHE-AEC1-Z operate at 100% duty cycle, and under what conditions?
Yes - the MPQ2178GQHE-AEC1-Z supports true 100% duty cycle operation in dropout mode when VIN approaches VOUT + voltage drop across the high-side MOSFET (≈70mΩ × IOUT). This enables regulation down to VOUT = VIN − 140mV at 2A, critical for maintaining rail integrity during automotive cold-crank events.
What is the purpose of the MeshConnect™ flip-chip packaging in this device?
MeshConnect™ flip-chip construction places the silicon die face-down on the leadframe, reducing bond wire inductance and improving thermal resistance (θJC = 25°C/W). This directly lowers switching losses, suppresses high-frequency EMI, and enhances power density - essential for meeting CISPR25 Class 5 emissions in automotive modules.
Is output discharge active during all disable states, including EN-driven shutdown?
Yes - output discharge activates whenever the device is disabled, whether by pulling EN low, removing VIN, or thermal shutdown. The internal discharge MOSFET connects OUT to GND through a 150Ω path, discharging typical 22µF output capacitors in <10ms. Discharge can be blocked by adding a diode or capacitor between VOUT and OUT per datasheet Section 9.2.
How does the constant-on-time (COT) control improve transient response compared to traditional PWM?
COT eliminates the need for error amplifier compensation and phase-margin analysis. Load transients cause immediate VFB deviation from 600mV, triggering a new on-pulse within one switching cycle. Measured response is <10µs for 1A load steps - significantly faster than typical compensated PWM controllers requiring 50–100µs settling.
MPQ2178GQHE-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
- Supplier Device Package:
- 8-QFN (2x1.5)
MPQ2178GQHE-AEC1-Z FAQ
1.How can I place an order for MPQ2178GQHE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2178GQHE-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-AEC1-Z reliable?
The price and inventory of MPQ2178GQHE-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-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2178GQHE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2178GQHE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2178GQHE-AEC1-Z?
MPQ2178GQHE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2178GQHE-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-AEC1-Z?
For technical support, including MPQ2178GQHE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2178GQHE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2178GQHE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2178GQHE-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-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2178GQHE-AEC1-Z?
All MPQ2178GQHE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2178GQHE-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-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2178GQHE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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