My Inquiry
My Account
Monolithic Power Systems Inc. MPQ2172GJ-AEC1-Z
- Part No.:
- MPQ2172GJ-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ2172GJ-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 2A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,345
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ2172GJ-AEC1-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-AEC1-Z datasheet, MPQ2172GJ-AEC1-Z pinout, MPQ2172GJ-AEC1-Z application, or MPQ2172GJ-AEC1-Z equivalent, key selection considerations include its TSOT23-8 package footprint, ±10% power-good window, 1.3ms soft-start time, thermal shutdown at 170°C, and AEC-Q100 qualification for under-hood automotive use.
Technical Context
The MPQ2172GJ-AEC1-Z implements 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 P/N-channel MOSFETs with 80mΩ/45mΩ RDS(ON), enabling high efficiency at light-to-full load without external compensation.
It provides precise regulation via a 600mV ±12mV feedback reference, supports power sequencing with enable (EN) and open-drain power-good (PG) outputs, and includes cycle-by-cycle OCP (4.5A typ.), thermal shutdown (170°C), and short-circuit protection with automatic hiccup-mode recovery.
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 | 2A continuous - sufficient for powering SoC I/O domains, display interfaces, or sensor hubs in automotive ECUs. |
| Switching frequency | 2.6MHz typical (VIN=3.3V, VOUT=1.8V) - enables compact LC filter design with ≤1µH inductors and avoids AM radio band interference. |
| 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 around regulated output - provides reliable system power sequencing and fault detection for downstream logic. |
| Thermal shutdown | 170°C junction temperature - protects against sustained overload or poor PCB thermal design while allowing operation up to +150°C ambient. |
| Quiescent current | 720µA typical - minimizes standby power loss in always-on automotive modules such as telematics wake-up circuits. |
Pinout & Package
MPQ2172GJ-AEC1-Z is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density automotive PCB layouts with exposed thermal pad (PGND-connected) and fine-pitch leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PG | Open-drain power-good indicator | Pulled high to VIN via 500kΩ internal resistor when FB is within ±10% of 600mV; signals valid output to host MCU or PMIC sequencer. |
| 2 - VIN | Main input supply | Accepts 2.5V–5.5V; requires local 10µF ceramic decoupling; absolute max 6V transient rating. |
| 3 - SW | Switch node | Drives external inductor; connects internally to both MOSFETs; must be routed short and away from sensitive analog traces. |
| 4 - PGND | Power ground | High-current return path for MOSFETs and inductor; requires dedicated copper pour and multiple vias to thermal pad. |
| 5 - OUT | Output sense | Direct connection to regulated output rail; used for remote sensing to compensate PCB IR drop in high-current paths. |
| 6 - AGND | Analog ground | Reference for FB comparator and control circuitry; must be star-connected to PGND at single point near IC. |
| 7 - FB | Feedback input | Connects to resistor divider from VOUT to AGND; sets output voltage per VOUT = 0.6V × (1 + R1/R2). |
| 8 - EN | Enable input | Active-high logic (1.2V threshold); internal 1MΩ pulldown allows floating-disable; controls startup timing and power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-on-time (COT) control | Enables <10µs load transient response without external loop compensation, critical for burst-mode processor cores. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with HTOL, TC, ESD, and EMC stress - suitable for front-end automotive modules. |
| Integrated 80mΩ/45mΩ MOSFETs | Eliminates external FETs and gate drivers, reducing BOM count and layout area while maintaining >90% peak efficiency at 1.8V/2A. |
| Soft-start and soft-stop | 1.3ms controlled ramp-up and linear discharge prevent inrush current and VIN overshoot during EN-controlled shutdown. |
| Hiccup-mode short-circuit protection | Disables output, discharges SS capacitor, then retries - prevents thermal runaway during sustained overloads or board-level shorts. |
Applications
| Automotive Infotainment Power | Instrument Cluster Core Supply |
|---|---|
|
Use Scenario: Powers ARM-based application processors and DDR memory I/O rails in head-unit systems requiring clean, sequenced 1.2V/1.8V supplies. IC Role / Device Role / Timing Role: Primary buck regulator delivering 2A at 1.2V/1.8V with PG signaling to enable downstream LDOs and clocks. Use Value: 2.6MHz switching enables small 1µH inductors and 22µF ceramic output caps, reducing solution size by >35% vs. 500kHz alternatives. |
Use Scenario: Supplies microcontroller core voltage (1.2V) and display interface (1.8V) in digital instrument clusters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: AEC-Q100-compliant primary regulator with EN/PG sequencing for safe boot and fault reporting to vehicle CAN bus. Use Value: ±10% PG window and 170°C thermal shutdown ensure reliable operation during engine-off hot soak (125°C ambient + self-heating). |
| Telematics Module I/O Rail | Portable Diagnostic Tool Power |
|
Use Scenario: Generates stable 3.3V rail from 5V USB-C or 12V vehicle bus for LTE/Wi-Fi modems and GNSS receivers. IC Role / Device Role / Timing Role: Secondary buck converter stepping down from intermediate 5V rail; uses OUT pin for remote sensing across long PCB traces. Use Value: 100% duty-cycle capability maintains regulation during cold-crank (VIN drops to 2.5V), preventing modem reset during engine start. |
Use Scenario: Powers handheld OBD-II scanners with Li-ion battery input (3.0V–4.2V) and dual-output requirement (1.8V logic, 3.3V interface). IC Role / Device Role / Timing Role: Single-chip solution replacing discrete regulators; EN pin synchronized to MCU sleep/wake cycles to minimize quiescent loss. Use Value: 720µA IQ and auto-discharge at shutdown extend battery runtime beyond 8 hours in low-duty-cycle diagnostic mode. |
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-AEC1-Z | Successor with improved 2.8MHz fSW, lower 65mΩ/35mΩ RDS(ON), and extended 2.2V–5.5V input range. | Same TSOT23-8 footprint and pinout; supports lower VIN brownout (2.2V) and higher efficiency at 1A–2A loads. | Select MPQ2178 for new designs requiring longer lifetime support and margin for future automotive voltage derating. |
| TPS62840DLCR | TI part with 1.8V–5.5V input, 1.5A output, 4MHz fSW, and 25nA IQ - but not AEC-Q100 qualified. | Lacks automotive qualification and hiccup-mode SCP; requires external PG circuitry and has no OUT sense pin. | Only consider for non-automotive portable instruments where ultra-low IQ outweighs qualification and protection requirements. |
Compared with MPQ2172GJ-AEC1-Z, MPQ2178GJ-AEC1-Z offers higher efficiency and broader input range in identical packaging, while TPS62840DLCR trades automotive reliability for extreme low-power operation - making MPQ2172 optimal for cost-sensitive, qualified legacy automotive designs.
Availability
MPQ2172GJ-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics modules requiring stable component supply with full AEC-Q100 traceability and long-term production continuity.
Supply support for MPQ2172GJ-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 analog and power ICs, with over two decades of leadership in DC/DC conversion and motor driver technology.
The MPQ2172 belongs to MPS's automotive-grade monolithic buck converter product line, designed specifically for space-constrained, thermally demanding automotive subsystems requiring AEC-Q100 compliance and robust protection features.
FAQ
Is MPQ2172GJ-AEC1-Z still recommended for new designs?
No. The official datasheet states "NOT RECOMMENDED FOR NEW DESIGNS, REFER TO MPQ2178". MPQ2172GJ-AEC1-Z remains available for existing production and legacy program support, but MPQ2178GJ-AEC1-Z is the designated successor with enhanced specs and ongoing roadmap support.
What is the function of the OUT pin (Pin 5) and how does it differ from FB?
The OUT pin provides remote output voltage sensing to compensate for PCB trace resistance between the IC and load. Unlike FB-which senses at the IC's feedback node-OUT connects directly to the load's power rail, enabling tighter regulation under high-current conditions where IR drop would otherwise cause error.
How does the MPQ2172 handle short-circuit events?
Upon detecting overcurrent, the MPQ2172 enters hiccup-mode protection: it disables switching, discharges the soft-start capacitor, waits a recovery interval, then attempts soft-start again. This cycle repeats until the short is removed, limiting average power dissipation and preventing thermal damage.
Can MPQ2172GJ-AEC1-Z operate with 100% duty cycle, and under what conditions?
Yes. The device supports 100% duty cycle in dropout mode when VIN ≤ VOUT + voltage headroom (dictated by RDS(ON) and load current). This allows regulation down to VIN − 0.5V, critical for maintaining output during automotive cold-crank when input drops to 2.5V.
What is the recommended minimum output capacitance for stable operation?
MPS specifies stability with low-ESR ceramic capacitors ≥22µF (e.g., X5R/X7R 16V). Using smaller values risks instability or excessive ripple; larger values require careful soft-stop design to avoid VIN overshoot beyond 6V during EN-controlled shutdown.
Does the PG pin require an external pull-up resistor?
No. The PG pin is open-drain with an internal 500kΩ pull-up to VIN. An external resistor is unnecessary and may interfere with the ±10% trip thresholds; only an external pull-down is needed if active-low logic is required.
How is thermal performance affected by PCB layout in the TSOT23-8 package?
Thermal resistance θJA is 100°C/W on a standard 4-layer board. Performance improves significantly with a solid PGND copper pour under the exposed thermal pad and ≥4 thermal vias to inner ground planes-reducing junction temperature rise by up to 40°C at full 2A load.
MPQ2172GJ-AEC1-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-AEC1-Z FAQ
1.How can I place an order for MPQ2172GJ-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2172GJ-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 MPQ2172GJ-AEC1-Z reliable?
The price and inventory of MPQ2172GJ-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 MPQ2172GJ-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ2172GJ-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2172GJ-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2172GJ-AEC1-Z?
MPQ2172GJ-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2172GJ-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 MPQ2172GJ-AEC1-Z?
For technical support, including MPQ2172GJ-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2172GJ-AEC1-Z requirements.
6.How does Aetrix verify that MPQ2172GJ-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2172GJ-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 MPQ2172GJ-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ2172GJ-AEC1-Z?
All MPQ2172GJ-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2172GJ-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 MPQ2172GJ-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ2172GJ-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ2172GJ-AEC1-Z 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…
