My Inquiry
My Account
Monolithic Power Systems Inc. MPQ2178AGQHE-AEC1-P
- Part No.:
- MPQ2178AGQHE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-VFDFN
- Datasheet:
-
MPQ2178AGQHE-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 2A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,271
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ2178AGQHE-AEC1-P 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, 1.1V, 1.2V), 2.4MHz switching frequency, and integrated power MOSFETs (70mΩ PCH / 40mΩ NCH). It serves as the primary voltage regulator in automotive infotainment power rails.
For engineers reviewing the MPQ2178AGQHE-AEC1-P datasheet, MPQ2178AGQHE-AEC1-P pinout, MPQ2178AGQHE-AEC1-P application, or MPQ2178AGQHE-AEC1-P equivalent, key selection criteria include its COT control architecture for fast transient response, wettable-flank QFN-8 package for automated optical inspection, AEC-Q100 qualification for under-hood environments, and integrated PG/SS/EN functions enabling robust power sequencing in telematics modules.
Technical Context
The MPQ2178AGQHE-AEC1-P employs constant-on-time (COT) control with VIN feed-forward to maintain stable 2.4MHz switching across full load and input voltage ranges (2.5V–6V), eliminating loop compensation components. Its internal 70mΩ high-side P-channel and 40mΩ low-side N-channel MOSFETs enable high efficiency at light loads via FCCM operation.
Functional safety support includes MPSafe™ QM documentation, 1% FB reference accuracy (594–606mV), and comprehensive fault protection: cycle-by-cycle current limiting (3.5A peak), hiccup-mode short-circuit protection, thermal shutdown at 170°C, and output over-voltage protection at 115% of VFB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports direct connection to automotive 3.3V/5V rails and battery-supplied systems with cold-crank tolerance down to 2.5V. |
| Output Current | 2A continuous - sustains full load without derating up to +125°C junction temperature in typical PCB layouts. |
| Switching Frequency | 2.4MHz ±10% - enables use of compact 1µH inductors and reduces EMI fundamental energy above AM band for CISPR25 Class 5 compliance. |
| Feedback Accuracy | ±1% (594–606mV at 25°C) - ensures precise output regulation critical for sensitive SoC core supplies in clusters and camera modules. |
| Thermal Rating | Junction temp −40°C to +150°C - validated for under-dash and engine bay placement per AEC-Q100 Grade 1 requirements. |
| Power Good Threshold | 90% of VREF rising edge - provides accurate rail validation with 5% hysteresis to prevent false toggling during line transients. |
| Soft-Start Current | 3µA (adjustable version) - sets controlled VOUT ramp rate using external CSS; minimum 1nF capacitor yields ~0.2ms start-up time. |
Pinout & Package
MPQ2178AGQHE-AEC1-P 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 drops below 85% VREF - enables system-level rail monitoring and sequencing. |
| 2 - VIN | Main input supply | Accepts 2.5V–6V; requires local ceramic decoupling to suppress high-frequency switching noise and input ripple. |
| 3 - SW | Switch node | Drain of internal high-side P-MOSFET; connects directly to inductor - layout critical for EMI and efficiency. |
| 4 - GND | Power and signal ground | Single ground pad; must be connected to low-impedance thermal plane for thermal dissipation and noise control. |
| 5 - EN | Enable control input | Logic-compatible (0.9V turn-on, 0.65V turn-off); internal 2MΩ pull-down allows default-disable operation. |
| 6 - SS | External soft-start timing | Charged by 3µA internal current source; sets VOUT ramp slope to limit inrush current into downstream capacitance. |
| 7 - OUT | Regulated output voltage | Delivers up to 2A; requires bulk and high-frequency ceramic output capacitors for stability and ripple suppression. |
| 8 - FB | Feedback input | Compares divider voltage against 0.6V internal reference; floating in fixed-output variants (e.g., MPQ2178GQHE-12-AEC1-P). |
Key Features
| Feature | Design Value |
|---|---|
| MeshConnect™ flip-chip packaging | Reduces parasitic inductance by >30% vs. wire-bond QFN, improving EMI performance and enabling CISPR25 Class 5 compliance. |
| FCCM operation across full load | Maintains continuous conduction mode from zero to full load - eliminates audible switching noise and improves light-load regulation. |
| Integrated output discharge | 150Ω internal discharge path activates on shutdown - prevents residual VOUT hold-up that could interfere with downstream logic sequencing. |
| Pre-biased start-up capability | Enables safe startup even when output capacitor is pre-charged - essential for hot-swap and multi-rail power-up scenarios. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with lifetime reliability testing - suitable for front-end infotainment and ADAS domain controllers. |
Applications
| Automotive Infotainment | Camera Modules |
|---|---|
|
Use Scenario: Powering SoC cores and DDR memory in head-unit systems requiring tight voltage tolerance and low-noise operation. IC Role / Device Role / Timing Role: Primary buck regulator supplying 1.1V or 1.2V core rail with <±1% regulation and 2.4MHz switching to avoid interference with RF bands. Use Value: Integrated COT control delivers <10µs load transient recovery, preventing brown-out during video decode bursts. |
Use Scenario: Generating clean 1.8V or 2.8V rails for CMOS image sensors and ISP processors in surround-view and driver-monitoring cameras. IC Role / Device Role / Timing Role: Secondary buck converter with ultra-low output ripple (<10mVpp) enabled by 2.4MHz FCCM and integrated compensation. Use Value: Wettable-flank QFN-8 ensures reliable reflow in high-density camera PCBs and supports AOI verification for automotive traceability. |
| Automotive Clusters | Telematics Control Units |
|
Use Scenario: Supplying 3.3V or 5V auxiliary rails for microcontrollers, CAN transceivers, and display drivers in digital instrument clusters. IC Role / Device Role / Timing Role: High-efficiency (≥92% at 1A) buck converter operating from 5V pre-regulator, leveraging 100% duty cycle capability for low-dropout operation. Use Value: PG pin provides deterministic power-good assertion to cluster MCU, enabling synchronized boot and fail-safe state management. |
Use Scenario: Regulating 1.2V core and 1.8V I/O rails for LTE/C-V2X modems and GNSS receivers in TCU modules exposed to wide temperature swings. IC Role / Device Role / Timing Role: AEC-Q100 qualified buck converter with −40°C to +150°C junction rating and thermal shutdown hysteresis (20°C) for sustained reliability. Use Value: Soft-start programmability (via SS pin) prevents inrush current tripping fuse in shared vehicle battery circuits during ignition-on events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2177GQHE-AEC1-P | Same QFN-8 package and AEC-Q100 Grade 1 rating, but rated for 1.5A output and 2.2MHz switching; lacks PG pin and output discharge. | Suitable for lower-current auxiliary rails (e.g., CAN PHY, sensor interfaces) where rail sequencing is not required. | Select when cost sensitivity outweighs need for 2A capacity or PG monitoring in non-safety-critical subsystems. |
| TPS628641ARGRR | TI device in 1.2mm × 1.6mm QFN; 2A, 2.25MHz, but only AEC-Q200 qualified (not Q100); no integrated output discharge or pre-biased start-up. | Applicable in industrial or commercial automotive-adjacent designs where full AEC-Q100 is not mandated. | Choose only if TI's WEBENCH ecosystem and dual-VOUT capability are prioritized over automotive-grade fault coverage and thermal robustness. |
Compared with MPQ2177GQHE-AEC1-P and TPS628641ARGRR, the MPQ2178AGQHE-AEC1-P uniquely combines AEC-Q100 Grade 1, integrated PG/SS/EN/discharge, and 2.4MHz FCCM in a wettable-flank package-making it the sole option for safety-aware, space-constrained, and EMI-sensitive automotive core rail applications.
Availability
MPQ2178AGQHE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ2178AGQHE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2178 belongs to MPS's automotive-grade MPQ series, engineered specifically for demanding automotive subsystems requiring AEC-Q100 qualification, extended temperature operation, and functional safety documentation (MPSafe™ QM).
FAQ
What is the minimum recommended soft-start capacitor value for MPQ2178AGQHE-AEC1-P?
The datasheet specifies a minimum soft-start capacitance of 1nF for the adjustable-output version. With the internal 3µA SS charge current, this yields a nominal soft-start time of approximately 0.2ms. Using smaller values risks excessive inrush current; larger values extend startup but improve surge immunity.
Does MPQ2178AGQHE-AEC1-P support pre-biased start-up?
Yes. The MPQ2178AGQHE-AEC1-P supports pre-biased start-up: when EN is asserted, the controller begins switching even if the OUT pin already holds a voltage. This prevents latch-up or uncontrolled charging in multi-rail systems where downstream capacitance may retain charge.
How does the PG pin behave during undervoltage or overvoltage conditions?
The PG pin asserts high when VFB reaches ≥90% of the 0.6V internal reference (i.e., ≥540mV) and de-asserts low when VFB falls ≤85% (≤510mV), providing 5% hysteresis. During output overvoltage (>115% VFB), PG remains high until regulation recovers - it does not indicate OV faults directly.
Can MPQ2178AGQHE-AEC1-P operate at 100% duty cycle?
Yes. The device supports 100% duty cycle operation in dropout mode, allowing VOUT to track VIN − (IL × RDS(ON)_P) down to VIN − 0.5V. This is critical for maintaining regulation during cold-crank events where VIN dips near VOUT.
What is the purpose of the wettable flank feature in the QFN-8 package?
The wettable flank design exposes solderable sidewalls on all eight leads, enabling automated optical inspection (AOI) of solder joints - a mandatory requirement for automotive PCB assembly process control and zero-defect quality targets per IATF 16949.
Is external compensation required for MPQ2178AGQHE-AEC1-P?
No. The MPQ2178AGQHE-AEC1-P integrates a complete compensation network optimized for COT control. No external RC network is needed - only standard input/output capacitors and an inductor are required for stable operation across all load and input conditions.
How does the MPQ2178AGQHE-AEC1-P handle short-circuit faults?
Upon detecting a short circuit, the device enters hiccup-mode protection: it shuts down for ~20ms, then attempts restart. This limits average power dissipation and prevents thermal runaway while enabling automatic recovery once the fault clears - verified per AEC-Q100 stress test protocols.
MPQ2178AGQHE-AEC1-P 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 8-QFN (2x1.5)
MPQ2178AGQHE-AEC1-P FAQ
1.How can I place an order for MPQ2178AGQHE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-P reliable?
The price and inventory of MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ2178AGQHE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2178AGQHE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2178AGQHE-AEC1-P?
MPQ2178AGQHE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-P?
For technical support, including MPQ2178AGQHE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2178AGQHE-AEC1-P requirements.
6.How does Aetrix verify that MPQ2178AGQHE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ2178AGQHE-AEC1-P?
All MPQ2178AGQHE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2178AGQHE-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 MPQ2178AGQHE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ2178AGQHE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ2178AGQHE-AEC1-P Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
