My Inquiry
My Account
Monolithic Power Systems Inc. MPQ2172GJ-P
- Part No.:
- MPQ2172GJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ2172GJ-P.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:994
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ2172GJ-P from Monolithic Power Systems is a monolithic, 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, and operates at a default 2.6MHz switching frequency with constant-on-time (COT) control-enabling fast transient response in automotive infotainment power rails.
For engineers reviewing the MPQ2172GJ-P datasheet, MPQ2172GJ-P pinout, MPQ2172GJ-P application, or MPQ2172GJ-P equivalent, key selection considerations include its TSOT23-8 package footprint, PG open-drain power-good signaling, EN-controlled sequencing, cycle-by-cycle over-current protection, and soft-start/soft-stop behavior during enable/disable transitions.
Technical Context
The MPQ2172GJ-P implements constant-on-time (COT) control with input voltage feed-forward, maintaining stable switching frequency across 2.5V–5.5V input and 0.6V–(VIN−0.5V) output ranges. Its internal power stage integrates complementary PCH/NCH MOSFETs with on-resistances of 80mΩ/45mΩ, enabling high efficiency at light-to-full load without external compensation.
It features dual ground domains (PGND for power path, AGND for analog reference), a precision 600mV ±12mV feedback reference, and a 500kΩ internal pull-up on the open-drain PG pin that asserts when FB is within ±10% of regulation-supporting robust power sequencing in automotive clusters and telematics systems.
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 supplies with UVLO at 2.2V (±0.2V). |
| Output Current | Up to 2A continuous - sustained under thermal limits (θJA = 100°C/W) with proper PCB copper area and airflow. |
| Switching Frequency | 2.6MHz typical (VIN=3.3V, VOUT=1.8V) - enables use of sub-1µH inductors and compact ceramic output capacitors. |
| Feedback Reference | 600mV ±12mV (−40°C to +125°C) - sets output voltage via external resistor divider; enables 0.6V minimum VOUT. |
| Power Good Threshold | ±10% window around regulated VOUT - PG pin pulls high only when FB is between 540mV and 660mV, ensuring reliable system power validation. |
| Thermal Shutdown | 170°C junction temperature - internal protection disables switching until die cools by ≥30°C hysteresis. |
| Quiescent Current | 720μA typical - enables low-noise operation in always-on automotive subsystems without excessive standby loss. |
Pinout & Package
MPQ2172GJ-P is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), featuring exposed thermal pad for improved heat dissipation in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power-good indicator | Pulled high to VIN via internal 500kΩ resistor when FB is within ±10% of 600mV; used for system-level power sequencing and fault detection. |
| 2 - VIN | Main input supply | Accepts 2.5V–5.5V; requires local 10μF ceramic decoupling; absolute max 6V transient rating. |
| 3 - SW | Switch node | Connects to external inductor; carries high di/dt; must be routed short and away from sensitive analog traces (FB, AGND). |
| 4 - PGND | Power ground | Reference for MOSFETs and SW node; requires low-impedance copper pour and multiple vias to thermal pad. |
| 5 - OUT | Output sense | Direct connection to output capacitor; improves load regulation by sensing post-inductor voltage drop. |
| 6 - AGND | Analog ground | Reference for FB, EN, and internal error amplifier; must be separated from PGND and joined at single point near IC. |
| 7 - FB | Feedback input | High-impedance (10nA bias) node tied to resistor divider; sets VOUT = 0.6V × (1 + R1/R2). |
| 8 - EN | Enable control | Logic-high (>1.2V) enables regulator; internal 1MΩ pulldown allows floating-disable; supports controlled power-up/down sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-on-time (COT) control | Enables <10μs load transient response without external loop compensation; frequency remains stable across input/output variations. |
| Integrated 80mΩ/45mΩ MOSFETs | Eliminates external FETs and drivers; achieves >90% peak efficiency at 1.2V/2A with 1μH inductor and 22μF ceramic output cap. |
| Soft-start and soft-stop | 1.3ms typical ramp-up time prevents output overshoot; linear discharge during EN disable avoids input voltage surge from output capacitor energy transfer. |
| Hiccup-mode short-circuit protection | Enters recovery cycle (disable → soft-start → re-enable) upon SCP detection; protects against sustained shorts without thermal runaway. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction operation; validated for automotive infotainment, cluster, and telematics applications per stress test requirements. |
Applications
| Automotive Infotainment | Automotive Clusters |
|---|---|
|
Use Scenario: Powering SoC I/O rails and display interface circuitry in head-unit systems operating from 3.3V or 5V vehicle bus. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V step-down regulator delivering clean, sequenced power with PG confirmation before SoC boot. Use Value: 2.6MHz operation minimizes EMI and allows ultra-compact layout; COT control maintains tight regulation during burst-mode audio processing loads. |
Use Scenario: Supplying microcontroller core and CAN transceiver rails in digital instrument clusters with strict startup timing. IC Role / Device Role / Timing Role: Secondary buck converter providing 3.3V for MCU peripherals and 1.8V for display driver ICs, coordinated via EN and PG signals. Use Value: Dual ground separation (PGND/AGND) ensures noise immunity in mixed-signal environments; soft-start prevents reset glitches during ignition-on. |
| Automotive Telematics | Low-Voltage I/O System Power |
|
Use Scenario: Generating 1.2V and 1.8V supplies for LTE/GNSS modems and secure element ICs in connected car gateways. IC Role / Device Role / Timing Role: High-efficiency intermediate regulator converting 5V domain to low-voltage logic rails with hiccup-mode fault containment. Use Value: AEC-Q100 qualification ensures reliability under vibration, thermal cycling, and load dump conditions; 100% duty cycle supports dropout operation during cold-crank. |
Use Scenario: Powering FPGA I/O banks, sensor interfaces, and level-shifters in portable diagnostic tools and ADAS edge nodes. IC Role / Device Role / Timing Role: Compact, self-contained buck converter replacing discrete solutions in space-limited handheld enclosures. Use Value: TSOT23-8 footprint reduces board area by >40% vs. SOIC-8 alternatives; stable with low-ESR ceramics eliminates need for bulk electrolytics. |
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-P | Successor device with identical pinout, same 2.5V–5.5V input, but rated for 3A output and improved thermal performance (θJA = 85°C/W). | Supports higher current loads without redesign; retains same footprint and control features (EN, PG, COT). | Select MPQ2178GJ-P for new designs requiring >2A or extended thermal margin; MPQ2172GJ-P remains viable for legacy replacement or ≤2A use cases. |
| MP2172GJ-Z | Industrial-grade (non-AEC-Q100) variant with identical electrical specs and TSOT23-8 package, but rated only to +125°C TJ. | Lacks automotive qualification testing; suitable for non-automotive industrial or consumer applications where cost sensitivity outweighs qualification needs. | Choose MP2172GJ-Z for cost-sensitive non-automotive designs; avoid where AEC-Q100 compliance is mandatory (e.g., OEM Tier 1 BOMs). |
Compared with MPQ2178GJ-P, the MPQ2172GJ-P offers proven automotive qualification at lower current capacity, while MP2172GJ-Z provides identical functionality without qualification overhead-making MPQ2172GJ-P optimal for legacy AEC-Q100-compliant 2A designs where footprint and feature compatibility are critical.
Availability
MPQ2172GJ-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics systems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MPQ2172GJ-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 analog and power ICs, with design centers across Asia and North America and global manufacturing partnerships.
The MPQ2172 belongs to MPS's automotive-qualified buck converter product line, engineered specifically for high-reliability, high-frequency DC/DC conversion in safety-critical vehicle subsystems-including infotainment, ADAS, and body electronics.
FAQ
What does "NOT RECOMMENDED FOR NEW DESIGNS" mean for MPQ2172GJ-P?
This designation indicates MPS has released a functional successor-the MPQ2178GJ-P-with higher current capability (3A), improved thermal resistance, and identical pinout and feature set. MPQ2172GJ-P remains fully qualified, in production, and supported for existing designs, but new projects should evaluate MPQ2178GJ-P for future-proofing and margin improvement.
Can MPQ2172GJ-P operate with 100% duty cycle, and under what conditions?
Yes-MPQ2172GJ-P supports 100% duty cycle operation when input voltage drops near the output voltage (e.g., VIN = 1.25V, VOUT = 1.2V), enabling continued regulation during automotive cold-crank events. This behavior is enabled by its COT architecture and internal synchronous rectifier, eliminating diode conduction losses.
How does the PG pin behave during startup and fault conditions?
The PG pin is an open-drain output pulled high to VIN via an internal 500kΩ resistor. It asserts high only when FB voltage remains within ±10% of 600mV for ≥110μs (PG delay). During startup, PG goes high after soft-start completes and regulation is achieved; during over-current or undervoltage faults, PG pulls low within microseconds to signal failure.
Why does MPQ2172GJ-P require separate PGND and AGND pins?
Separate grounds isolate high-current switching paths (PGND) from precision analog references (AGND), preventing noise coupling into the feedback loop. PGND carries pulsed inductor current and SW node return; AGND serves the error amplifier, reference, and FB input. They must connect at a single point near the IC's thermal pad to avoid ground loops and ensure stable regulation.
What is the maximum recommended output capacitance to avoid VIN overvoltage during soft-stop?
To prevent VIN from exceeding its 6V absolute maximum during soft-stop discharge, output capacitance C2 must satisfy C2 < C1 × (36 / (VIN − VOUT)²), where C1 is input capacitance. For example, with VIN = 5V, VOUT = 3.3V, and C1 = 20μF, C2 must be <20μF. Exceeding this risks input rail damage unless shutdown is performed via VIN removal instead of EN toggle.
Does MPQ2172GJ-P support external synchronization or frequency adjustment?
No-MPQ2172GJ-P uses fixed-frequency COT control with no external sync input or programmable frequency pin. Switching frequency varies slightly with input/output voltage per datasheet tables (e.g., 2.0–2.8MHz), but cannot be locked to an external clock or trimmed via resistor. For sync-capable alternatives, consider MPS's MPQ4420A or MPQ4470 series.
Is the TSOT23-8 package lead-free and RoHS-compliant?
Yes-MPQ2172GJ-P is fully lead-free, halogen-free, and compliant with the EU RoHS Directive. All solderable terminations meet JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements, and the package uses matte tin plating compatible with standard reflow profiles.
MPQ2172GJ-P 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-P FAQ
1.How can I place an order for MPQ2172GJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2172GJ-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 MPQ2172GJ-P reliable?
The price and inventory of MPQ2172GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2172GJ-P is usually 5 days.
3.What payment methods are accepted for MPQ2172GJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2172GJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2172GJ-P?
MPQ2172GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2172GJ-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 MPQ2172GJ-P?
For technical support, including MPQ2172GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2172GJ-P requirements.
6.How does Aetrix verify that MPQ2172GJ-P is sourced from the original manufacturer or authorized distributors?
All MPQ2172GJ-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 MPQ2172GJ-P meets industry standards.
7.What is the process for return or replacement of MPQ2172GJ-P?
All MPQ2172GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2172GJ-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 MPQ2172GJ-P part is unused and in its original packaging.
Return procedure for MPQ2172GJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ2172GJ-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…
