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Monolithic Power Systems Inc. MPQ2171GJ-P
- Part No.:
- MPQ2171GJ-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ2171GJ-P.pdf
- Description:
- IC REG BUCK ADJ 1A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,654
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Product details
Overview
MPQ2171GJ-P from Monolithic Power Systems is a monolithic, AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 90mΩ high-side and 50mΩ low-side MOSFETs. It delivers up to 1A 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-enabling compact automotive power supplies for infotainment and cluster systems.
For engineers reviewing the MPQ2171GJ-P datasheet, MPQ2171GJ-P pinout, MPQ2171GJ-P application, or MPQ2171GJ-P equivalent, key selection considerations include its COT control architecture for fast transient response, EN/PG pins for power sequencing in automotive modules, thermal shutdown (170°C), and TSOT23-8 package constraints for high-density PCB layout.
Technical Context
The MPQ2171GJ-P employs constant-on-time (COT) control with input voltage feed-forward to maintain 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 90mΩ/50mΩ RDS(on), enabling high efficiency at light-to-full load without external compensation.
It features cycle-by-cycle over-current protection (4A HS limit), hiccup-mode short-circuit recovery, auto-discharge during shutdown, and ±10% power-good window referenced to 0.6V feedback threshold. The dual-ground architecture (PGND/AGND) isolates power and analog return paths to minimize noise coupling in sensitive automotive subsystems.
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-supervised domains. |
| Output Current | 1A continuous - sufficient for powering microcontrollers, display drivers, and CAN transceivers in telematics units. |
| Switching Frequency | 2.6MHz typical (VIN=3.3V, VOUT=1.8V) - enables use of sub-1µH inductors and reduces EMI filter size. |
| Feedback Voltage | 600mV ±12mV (−40°C to +125°C) - sets precise output regulation with external resistor divider (e.g., 41.2kΩ/41.2kΩ for 1.2V). |
| Thermal Shutdown | 170°C with 30°C hysteresis - protects against sustained overload in sealed automotive enclosures. |
| Power Good Threshold | ±10% window around 0.6V FB voltage - provides reliable rail validation for downstream logic sequencing. |
| Quiescent Current | 720μA typical - minimizes standby power loss in always-on vehicle modules. |
Pinout & Package
MPQ2171GJ-P is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for automotive PCB space constraints and thermal dissipation via exposed PGND pad.
| 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 0.6V; signals valid output to host MCU. |
| 2 (VIN) | Main input supply | Accepts 2.5V–5.5V; requires local 10μF ceramic capacitor to suppress high-frequency switching noise. |
| 3 (SW) | Switch node | Connects to external inductor; carries high di/dt; must be routed short and away from AGND/FB traces. |
| 4 (PGND) | Power ground | High-current return path for MOSFETs; requires dedicated copper pour and multiple vias to thermal pad. |
| 5 (OUT) | Output sense | Direct connection to regulated output; used for remote sensing in high-current applications. |
| 6 (AGND) | Analog ground | Reference for FB, EN, and internal error amplifier; must be isolated from PGND except at single-point star ground. |
| 7 (FB) | Feedback input | Monitors voltage divider output; 10nA bias current enables high-value resistors (e.g., 41.2kΩ) for low power loss. |
| 8 (EN) | Enable control | Logic-high (>1.2V) enables operation; internal 1MΩ pull-down allows floating-disable; supports controlled power-up sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-on-time (COT) control | Enables <10μs load transient response without external compensation components-critical for burst-mode MCU operation. |
| Integrated 90mΩ/50mΩ MOSFETs | Eliminates external FETs and gate drivers, reducing BOM count and board area by >30% vs discrete buck solutions. |
| Soft-start / soft-stop | 1.3ms ramp-up and linear discharge on EN deassertion-prevents output overshoot and avoids VIN overvoltage during C2 discharge. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature-validated for under-hood and dashboard-mounted automotive electronics. |
| Stable with low-ESR ceramics | Supports X5R/X7R MLCCs only-no tantalum or electrolytic capacitors required, improving reliability and lifetime. |
Applications
| Automotive Infotainment | Instrument Cluster |
|---|---|
Use Scenario: Powering SoC I/O rails and audio codecs in head-unit designs with tight thermal envelopes. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V point-of-load regulator delivering clean, sequenced power to application processors and display interfaces. Use Value: 2.6MHz operation allows 1μH inductor and 22μF output capacitance-reducing solution footprint by 40% vs 500kHz alternatives. |
Use Scenario: Supplying 3.3V logic and 1.2V GPU cores in digital instrument clusters with real-time graphics rendering. IC Role / Device Role / Timing Role: Secondary buck converter synchronized to main system clock for low-noise pixel timing and display refresh stability. Use Value: ±10% PG window ensures deterministic MCU boot sequence before LCD initialization begins. |
| Telematics Control Unit | Low-Voltage I/O System Power |
Use Scenario: Providing regulated 1.8V for LTE/CAN-FD modems and GNSS receivers in connected vehicle gateways. IC Role / Device Role / Timing Role: Isolated power domain with independent EN/PG control for modem firmware reset coordination and RF interference mitigation. Use Value: Cycle-by-cycle OCP prevents latch-up during antenna surge events-maintaining CAN bus uptime during ESD transients. |
Use Scenario: Generating 0.6V–3.3V rails for sensor interface ICs, LIN transceivers, and EEPROMs in body control modules. IC Role / Device Role / Timing Role: Flexible adjustable-output buck supplying multiple voltage domains from single 5V input rail. Use Value: 100% duty-cycle dropout mode sustains regulation during cold-crank (VIN = 2.5V), ensuring sensor data continuity. |
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 |
|---|---|---|---|
| MPQ2177GJ-P | Successor with improved 2.2MHz–4MHz programmable frequency, lower IQ (350μA), and extended -40°C to +150°C TJ range. | Required for new designs per MPS notice; supports higher ambient temperatures in engine bay placements. | Select MPQ2177GJ-P for production releases-MPQ2171GJ-P is not recommended for new designs. |
| TPS62840DGRR | TI part with 1.8V–5.5V input, 0.6V–3.3V output, 1A rating, and 1.8MHz fixed frequency; lacks AEC-Q100 qualification and PG pin. | Suitable for industrial portable instruments but not automotive safety-critical functions due to missing automotive qualification. | Use only in non-automotive contexts where AEC-Q100 and power-good signaling are not required. |
Compared with MPQ2171GJ-P, MPQ2177GJ-P offers higher thermal margin and design longevity, while TPS62840DGRR trades automotive compliance for broader input flexibility and lower quiescent current-making it viable only in non-automotive, cost-sensitive applications.
Availability
MPQ2171GJ-P is available at Aetrix Electronics and suitable for automotive infotainment, instrument clusters, and telematics control units requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MPQ2171GJ-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 core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.
The MPQ2171 belongs to MPS's automotive-grade buck converter product line, designed specifically to meet stringent AEC-Q100 reliability standards and deliver compact, efficient power solutions for modern vehicle electronics.
FAQ
What does "NOT RECOMMENDED FOR NEW DESIGNS" mean for MPQ2171GJ-P?
This designation indicates that Monolithic Power Systems has superseded MPQ2171GJ-P with the MPQ2177GJ-P, which offers improved specifications including wider temperature range, lower quiescent current, and programmable switching frequency. While MPQ2171GJ-P remains in production for legacy support, new designs should adopt MPQ2177GJ-P to ensure long-term supply and technical alignment with MPS's roadmap.
Can MPQ2171GJ-P operate with 100% duty cycle, and under what conditions?
Yes-MPQ2171GJ-P supports 100% duty cycle in dropout mode when VIN drops to within 0.5V above the regulated output voltage (e.g., VIN ≥ 1.7V for VOUT = 1.2V). This maintains regulation during automotive cold-crank events where input voltage sags to 2.5V, ensuring uninterrupted power to critical sensors and communication ICs.
How does the dual-ground (PGND/AGND) configuration impact PCB layout?
PGND carries high pulsed currents from the internal MOSFETs and must be connected to a low-inductance copper pour tied directly to the input/output capacitors. AGND serves as the quiet reference for FB, EN, and PG circuits and must be routed separately, joining PGND only at a single point near the IC's ground pins to prevent noise coupling into the feedback loop.
What is the purpose of the "auto-discharge at power-off" feature?
When EN is pulled low, MPQ2171GJ-P actively discharges the output capacitor through its internal low-side MOSFET, ensuring rapid and controlled VOUT decay. This prevents floating voltages that could cause latch-up in downstream logic or violate reset timing requirements in automotive microcontrollers during controlled shutdown sequences.
Why does the datasheet specify a maximum output capacitance limit during soft stop?
During soft-stop, energy stored in the output capacitor (C2) discharges back into VIN. If C2 is too large relative to the input capacitor (C1), VIN can rise beyond its 6V absolute maximum rating-potentially damaging the IC or upstream regulators. Equation (11) in the datasheet (C2 < 36 × C1 × (VIN − VOUT)²) ensures safe voltage rise during this reverse energy transfer.
Is MPQ2171GJ-P compatible with ceramic output capacitors only?
Yes-the control loop is optimized for low-ESR ceramic capacitors (X5R/X7R dielectrics). Tantalum or aluminum electrolytic capacitors introduce excessive ESR and phase shift, risking instability and poor transient response. The datasheet explicitly states stability is guaranteed only with ceramic output caps.
Does the PG pin require an external pull-up resistor?
No-PG is an open-drain output with an internal 500kΩ pull-up resistor to VIN. An external pull-up is unnecessary and may interfere with the ±10% trip thresholds. Connecting PG directly to a microcontroller GPIO (with internal weak pull-up disabled) is sufficient for power-good monitoring.
MPQ2171GJ-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:
- 1A
- Frequency - Switching:
- 2.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MPQ2171GJ-P FAQ
1.How can I place an order for MPQ2171GJ-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2171GJ-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 MPQ2171GJ-P reliable?
The price and inventory of MPQ2171GJ-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2171GJ-P is usually 5 days.
3.What payment methods are accepted for MPQ2171GJ-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2171GJ-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2171GJ-P?
MPQ2171GJ-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2171GJ-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 MPQ2171GJ-P?
For technical support, including MPQ2171GJ-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2171GJ-P requirements.
6.How does Aetrix verify that MPQ2171GJ-P is sourced from the original manufacturer or authorized distributors?
All MPQ2171GJ-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 MPQ2171GJ-P meets industry standards.
7.What is the process for return or replacement of MPQ2171GJ-P?
All MPQ2171GJ-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2171GJ-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 MPQ2171GJ-P part is unused and in its original packaging.
Return procedure for MPQ2171GJ-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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