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Monolithic Power Systems Inc. MPQ2172GJ-Z
- Part No.:
- MPQ2172GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ2172GJ-Z.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,874
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Product details
Overview
MPQ2172GJ-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 80mΩ high-side and 45mΩ low-side MOSFETs. It delivers up to 2A continuous output current from a 2.5V–5.5V input, regulates output down to 0.6V, operates at 2.6MHz (typ.) with COT control, and features EN, PG, soft-start/stop, and hiccup-mode SCP-used in automotive clusters and infotainment power rails.
For engineers reviewing the MPQ2172GJ-Z datasheet, MPQ2172GJ-Z pinout, MPQ2172GJ-Z application, or MPQ2172GJ-Z equivalent, key selection considerations include its TSOT23-8 package footprint, ±10% power-good window, 1.3ms typical soft-start time, thermal shutdown at 170°C, and compatibility with low-ESR ceramic output capacitors in space-constrained automotive modules.
Technical Context
The MPQ2172GJ-Z employs constant-on-time (COT) control with input voltage feed-forward to maintain stable switching frequency across input (2.5V–5.5V) and output (0.6V–VIN−0.5V) ranges. Its internal power stage integrates complementary PCH/NCH MOSFETs with 80mΩ/45mΩ RDS(ON), enabling high efficiency at light and full load.
It implements cycle-by-cycle over-current protection with 4.5A (typ.) high-side current limit, short-circuit recovery via hiccup mode, and a precision 600mV ±12mV feedback reference. The open-drain PG pin uses a 500kΩ internal pull-up to VIN and asserts high when FB is within ±10% of regulation-critical for automotive power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports direct connection to automotive 3.3V/5V rails and battery-backed systems with brown-in/brown-out tolerance. |
| Output Current | Up to 2A continuous - sufficient for powering SoC I/O, display interfaces, and sensor hubs in compact automotive modules. |
| Switching Frequency | 2.6MHz (typ. at VIN=3.3V, VOUT=1.8V) - enables use of sub-1µH inductors and reduces EMI filtering area in high-density PCB layouts. |
| Feedback Reference | 600mV ±12mV (−40°C to +125°C) - ensures tight output regulation across automotive temperature range without external trimming. |
| Power Good Threshold | ±10% window (PGH = 110%, PGL = 90%) - provides robust power-rail monitoring for microcontroller reset coordination in safety-critical domains. |
| Thermal Shutdown | 170°C with 30°C hysteresis - protects against sustained overload while allowing recovery after transient thermal events. |
| Quiescent Current | 720µA (typ.) - minimizes standby power loss in always-on vehicle subsystems such as telematics wake-up circuits. |
Pinout & Package
MPQ2172GJ-Z is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for automotive PCB space constraints and thermal dissipation in high-ambient environments. Pin 1 is identified by a dot or beveled corner on the top marking side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power-good indicator | Signals valid output regulation (FB within ±10%); requires external pull-up only if interfacing with logic below VIN; simplifies power sequencing in multi-rail systems. |
| 2 - VIN | Main input supply | Accepts 2.5V–5.5V; must be decoupled with ≥10µF ceramic capacitor close to pin to suppress high-frequency switching noise and prevent UVLO false triggering. |
| 3 - SW | Switch node | Connects to external inductor; carries high di/dt; requires minimal trace length and separation from sensitive analog nodes (FB, AGND) to avoid coupling. |
| 4 - PGND | Power ground return | High-current return path for MOSFETs and inductor; must be tied to solid copper pour with multiple vias to minimize ground bounce and improve thermal conduction. |
| 5 - OUT | Output voltage sense | Direct connection to regulated output rail; used internally for line/load regulation compensation-bypasses external resistor divider for improved accuracy. |
| 6 - AGND | Analog ground reference | Low-noise reference for feedback amplifier and error comparator; must be isolated from PGND at single-point star ground to prevent digital noise injection. |
| 7 - FB | Feedback input | Connects to resistor divider tap; sets output voltage per VOUT = 0.6V × (1 + R1/R2); 10nA max input bias enables use of high-value resistors to reduce quiescent current. |
| 8 - EN | Enable control | Active-high logic input (1.2V threshold); internal 1MΩ pulldown allows floating for default-enable operation; supports controlled power-up/down sequencing in multi-converter systems. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-On-Time (COT) Control | Delivers <10µs load transient response without external compensation components-ideal for dynamic automotive loads like display backlight drivers. |
| Integrated Power MOSFETs | 80mΩ high-side + 45mΩ low-side RDS(ON) enables >90% peak efficiency at 1.8V/2A, eliminating discrete FET layout complexity and gate-drive design. |
| Auto Discharge at Power-Off | Soft-stop functionality linearly discharges output during EN deactivation-prevents uncontrolled voltage collapse that could disrupt downstream logic states. |
| AEC-Q100 Grade 1 Qualification | Rated for −40°C to +125°C junction operation with validated reliability testing-meets functional safety requirements for non-safety-critical automotive subsystems. |
| Stable with Ceramic Output Capacitors | Supports low-ESR X5R/X7R ceramics ≥22µF-reduces board area vs. tantalum/electrolytic and eliminates ESR-related aging concerns in 15-year vehicle lifecycles. |
Applications
| Automotive Infotainment | Automotive Clusters |
|---|---|
|
Use Scenario: Powering LCD display interface ICs and audio codec supplies in head-unit designs. IC Role / Device Role / Timing Role: Primary 1.8V/2A point-of-load regulator delivering clean, sequenced power synchronized with MCU boot sequence via EN and PG signals. Use Value: 2.6MHz switching avoids AM-band interference; ±10% PG window ensures reliable MCU reset assertion before firmware execution begins. |
Use Scenario: Supplying instrument cluster microcontrollers and TFT-LCD bias rails in digital dashboards. IC Role / Device Role / Timing Role: Secondary 1.2V/2A regulator with soft-start to prevent inrush-induced voltage droop on shared 5V domain during cold crank. Use Value: 1.3ms soft-start time limits input current surge to <3A, protecting upstream fuse and maintaining CAN bus stability during startup. |
| Automotive Telematics | Low-Voltage I/O System Power |
|
Use Scenario: Generating 3.3V rail for LTE modem baseband processors and GNSS receivers in connected car modules. IC Role / Device Role / Timing Role: Input-supply tolerant buck converter accepting wide 2.7V–5.5V input from vehicle battery via pre-regulator, with hiccup-mode SCP for antenna cable short protection. Use Value: 4.5A current limit and thermal shutdown prevent latch-up during RF front-end ESD events; AEC-Q100 qualification ensures field reliability under vibration and thermal cycling. |
Use Scenario: Providing regulated 0.6V–3.3V supplies for FPGA I/O banks, sensor signal conditioners, and USB PHYs in ADAS domain controllers. IC Role / Device Role / Timing Role: Configurable output buck regulator using external resistor divider; PG signal coordinates power-up of dependent peripherals via FPGA GPIO. Use Value: 0.6V minimum output enables core voltage scaling for low-power microcontrollers; 100% duty-cycle dropout supports start-stop engine operation down to 2.5V battery. |
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 |
|---|---|---|---|
| MPQ2178GJ-Z | Successor with same pinout, 3.5A output, lower RDS(ON) (65mΩ/35mΩ), and extended 2.2V–6V input range. | Supports higher current loads (e.g., multi-core SoCs) and deeper battery discharge (start-stop), but requires updated layout for higher peak currents. | Select MPQ2178GJ-Z for new designs requiring higher current headroom or wider input range; MPQ2172GJ-Z remains viable for legacy replacements where 2A suffices. |
| TPS62865ARGRR | TI part in 1.2mm × 1.6mm DSBGA package; 4A output, 1.8V–5.5V input, 2.25MHz fSW; no integrated PG, different enable logic. | Lacks PG pin and automotive qualification; requires external power-good circuitry and fails AEC-Q100 compliance for production automotive use. | Only consider TPS62865ARGRR for non-automotive industrial prototypes where PG is not required and qualification is waived. |
Compared with MPQ2172GJ-Z, MPQ2178GJ-Z offers higher current capability and broader input range in identical packaging-making it a drop-in upgrade-while TPS62865ARGRR trades automotive qualification and PG integration for higher output current in a smaller footprint, limiting its use to non-automotive contexts.
Availability
MPQ2172GJ-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics modules requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MPQ2172GJ-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2172 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for AEC-Q100 compliance, high-frequency operation, and robust protection features in harsh-temperature vehicular environments.
FAQ
What does "NOT RECOMMENDED FOR NEW DESIGNS" mean for MPQ2172GJ-Z?
This designation indicates MPS has released a functional successor (MPQ2178GJ-Z) with improved specs and long-term supply assurance. MPQ2172GJ-Z remains fully qualified, supported, and available for existing designs and last-time buys-but new projects should evaluate MPQ2178GJ-Z for future-proofing and extended lifecycle.
Can MPQ2172GJ-Z operate with 100% duty cycle, and why is that important?
Yes-it supports 100% duty cycle in dropout, meaning it maintains regulation even when input voltage drops to within ~100mV of the output (e.g., VIN = 1.9V for VOUT = 1.8V). This is critical for automotive start-stop operation where battery voltage dips to 6V or lower, ensuring uninterrupted power to safety-critical subsystems.
How does the PG pin function, and what external components does it require?
The PG pin is an open-drain output with a 500kΩ internal pull-up to VIN. It asserts high when FB is within ±10% of 600mV (i.e., 540mV–660mV). No external pull-up is needed unless interfacing with logic operating below VIN; in those cases, an external resistor to the target logic rail is required to ensure proper voltage translation.
What is the recommended input capacitor configuration for MPQ2172GJ-Z?
MPS specifies ≥10µF X5R/X7R ceramic capacitor placed directly between VIN and PGND, with ≤100mΩ ESR. For higher output voltages (e.g., 3.3V), a 47µF unit improves stability. An additional 0.1µF ceramic capacitor must be placed adjacent to the IC to suppress high-frequency noise and prevent EN/UVLO glitches during switching transitions.
Does MPQ2172GJ-Z require external compensation components?
No-its constant-on-time (COT) architecture is inherently stable with ceramic output capacitors and requires no external compensation network. This eliminates tuning effort and component count, reducing design risk and board area-especially valuable in space-constrained automotive modules where layout parasitics dominate loop behavior.
How does soft-stop behave during EN deactivation, and what design precautions apply?
When disabled via EN, MPQ2172GJ-Z linearly discharges the output by transferring energy back to VIN. If output capacitance is large and input capacitance small, VIN may rise above 6V absolute maximum. To prevent damage, ensure C1 ≥ C2/36 × (VIN − VOUT)2 per MPS Equation (11), or avoid EN-based shutdown in high-C2 systems.
Is MPQ2172GJ-Z compatible with lead-free reflow profiles?
Yes-MPQ2172GJ-Z is RoHS-compliant, halogen-free, and rated for standard JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C. Its TSOT23-8 package meets IPC/JEDEC moisture sensitivity level 1 (MSL-1), requiring no baking prior to assembly.
MPQ2172GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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:
- 2.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MPQ2172GJ-Z FAQ
1.How can I place an order for MPQ2172GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2172GJ-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 MPQ2172GJ-Z reliable?
The price and inventory of MPQ2172GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2172GJ-Z is usually 5 days.
3.What payment methods are accepted for MPQ2172GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2172GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2172GJ-Z?
MPQ2172GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2172GJ-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 MPQ2172GJ-Z?
For technical support, including MPQ2172GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2172GJ-Z requirements.
6.How does Aetrix verify that MPQ2172GJ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2172GJ-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 MPQ2172GJ-Z meets industry standards.
7.What is the process for return or replacement of MPQ2172GJ-Z?
All MPQ2172GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2172GJ-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 MPQ2172GJ-Z part is unused and in its original packaging.
Return procedure for MPQ2172GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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