My Inquiry
My Account
Monolithic Power Systems Inc. MPQ2128DG-LF-P
- Part No.:
- MPQ2128DG-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MPQ2128DG-LF-P.pdf
- Description:
- IC REG BUCK ADJ 1A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ2128DG-LF-P from Monolithic Power Systems is a 3MHz, current-mode, synchronous step-down DC/DC converter with integrated high- and low-side MOSFETs, supporting 2.5V–6V input and delivering up to 1A at output voltages as low as 0.6V. It features <1μA shutdown current, cycle-by-cycle over-current protection, thermal shutdown, and AEC-Q100 qualification for automotive use in infotainment power rails and ADAS camera modules.
For engineers reviewing the MPQ2128DG-LF-P datasheet, MPQ2128DG-LF-P pinout, MPQ2128DG-LF-P application, or MPQ2128DG-LF-P equivalent, key selection criteria include its 3MHz switching frequency enabling compact filter design, 0.6V feedback reference for precise low-VOUT regulation, and QFN8 (2mm×2mm) package with exposed thermal pad for thermal performance in space-constrained automotive PCBs.
Technical Context
The MPQ2128DG-LF-P implements slope-compensated peak-current-mode PWM control with fixed 3MHz oscillator frequency, enabling stable operation up to 95% efficiency and fast transient response. Its internal PFET/NFET pair supports 100% duty-cycle dropout operation and eliminates external Schottky diode requirements.
It integrates EN logic with 1.6V turn-on / 0.4V turn-off thresholds, FB regulation at 0.594V (typ) with ±12mV tolerance over temperature, and dual-stage protection: cycle-by-cycle current limiting (1.2A min over –40°C to +125°C) and thermal shutdown at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion/Li-polymer battery input and 5V rail down-conversion |
| Output Voltage Range | 0.6V to 6V - enables core voltage regulation for microcontrollers and sensors via external resistor divider |
| Switching Frequency | 3MHz (2.2–3.4MHz) - allows use of sub-2.2µH inductors and ≤10µF ceramic output capacitors |
| Max Load Current | 1A continuous - sustained delivery under full load at TJ ≤ 125°C with proper PCB thermal layout |
| Feedback Voltage | 0.594V (±12mV) - sets output accuracy; 0.6V nominal reference enables 0.6V minimum VOUT |
| Shutdown Current | <1.2µA - preserves battery life in always-on automotive modules during sleep mode |
| Thermal Shutdown | 150°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
Pinout & Package
MPQ2128DG-LF-P uses a thermally enhanced QFN8 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad (Pin 7) for direct PCB copper connection to improve power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback Input | Connects to resistor divider tap; regulates output by comparing against 0.594V internal reference |
| 2,4 (GND) | Power Ground | Low-impedance return path for IC ground currents; must be tied to thermal pad and system GND plane |
| 3 (IN) | Input Supply | Accepts 2.5V–6V; requires ≥4.7µF ceramic bypass capacitor placed adjacent to pin |
| 5,6 (SW) | Power Switch Node | Drain connection of internal PFET/NFET; drives external inductor; high dv/dt node requiring tight layout |
| 8 (EN) | Enable Control | Logic-level input: >1.6V = ON, <0.4V = OFF; supports sequencing and standby control |
| Exposed Pad | Thermal & Electrical Ground | Must be soldered to ≥100mm² PCB copper area for θJA = 50°C/W and thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for automotive ambient temperatures (–40°C to +125°C) and ESD/HBM robustness per AEC standard |
| Synchronous Rectification | Integrated NFET replaces Schottky diode, eliminating conduction loss and improving light-load efficiency |
| Internal Soft-Start | 100µs controlled ramp-up prevents inrush current and output overshoot during power-up |
| Cycle-by-Cycle OCP | Real-time current sensing limits peak inductor current to 1.2A min across full temperature range |
| Short-Circuit Recovery | Auto-reduces switching frequency and current limit during fault, then fully recovers when FB returns to 0.6V |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering SoC I/O rails and DDR memory termination in head-unit systems operating from 5V or battery input. IC Role / Device Role / Timing Role: Primary buck regulator providing stable 1.8V/3.3V outputs with fast load-step response to handle burst processing demands. Use Value: 3MHz switching enables small 1.2µH inductor and 10µF ceramic output cap, reducing board area by >40% vs. 500kHz converters. | Use Scenario: Supplying image sensor and ISP core voltage in rear-view or surround-view cameras exposed to engine bay thermal stress. IC Role / Device Role / Timing Role: High-efficiency, thermally robust point-of-load regulator meeting AEC-Q100 Grade 1 requirements. Use Value: Exposed thermal pad + QFN8 package sustains 1A load at +125°C junction temperature with minimal derating. |
| Industrial IoT Sensor Node | Portable Medical Monitor |
Use Scenario: Battery-powered wireless sensor nodes requiring ultra-low quiescent current and long runtime. IC Role / Device Role / Timing Role: Main system power supply stepping down Li-ion (3.0–4.2V) to 1.2V/1.8V for MCU and RF transceiver. Use Value: <1.2µA shutdown current extends shelf life and sleep-mode battery life beyond 10 years in sealed deployments. | Use Scenario: Compact handheld vital-sign monitors using single-cell Li-polymer battery with strict EMI and size constraints. IC Role / Device Role / Timing Role: Synchronous buck converter powering analog front-end and display driver from 3.7V nominal input. Use Value: Fixed 3MHz frequency places switching noise above sensitive audio/ECG bands and simplifies EMI filtering. |
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 |
|---|---|---|---|
| TPS62130ARGTR | 2.5V–6V input, 3MHz, 1.5A, but only 0.8V min VOUT; no AEC-Q100 rating | Targeted at industrial/commercial portable devices, not automotive qualified environments | Select if higher current headroom needed and AEC-Q100 is not required |
| LMQ66430QRNXTQ1 | 3V–36V input, 2.1MHz, 3A, AEC-Q100 Grade 1, but larger 3mm×3mm QFN package | Designed for wide-input automotive body electronics; less suitable for space-constrained camera modules | Select for 12V battery systems or where >1A load margin is critical |
Compared with TPS62130ARGTR and LMQ66430QRNXTQ1, MPQ2128DG-LF-P uniquely balances AEC-Q100 compliance, 2mm×2mm footprint, and 0.6V minimum output in a 1A solution-making it optimal for compact, battery-fed automotive vision systems where both size and qualification matter.
Availability
MPQ2128DG-LF-P is available at Aetrix Electronics and suitable for automotive infotainment power, ADAS camera modules, and industrial IoT sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ2128DG-LF-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 in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2128 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for AEC-Q100-compliant, high-frequency, space-constrained power delivery in modern vehicle electronics.
FAQ
What is the minimum recommended output capacitance for stable operation?
The MPQ2128DG-LF-P requires a minimum 10µF ceramic output capacitor with X5R/X7R dielectric and ≤10mΩ ESR. This value ensures loop stability at 3MHz and limits output ripple to <10mVPP under 1A load steps. Lower capacitance may cause instability or excessive overshoot during transients.
Does the device support forced PWM mode or only auto PFM/PWM?
The MPQ2128DG-LF-P operates exclusively in forced PWM mode-no pulse-frequency modulation (PFM) or discontinuous conduction mode (DCM) is implemented. This guarantees constant 3MHz switching regardless of load, simplifying EMI filtering and ensuring predictable timing behavior in noise-sensitive automotive applications.
Can the FB pin be used for remote sensing?
No, the FB pin is not designed for Kelvin (remote) sensing. It has no dedicated sense-return path or high-impedance buffer; routing traces directly from the output node to FB is required. For precision regulation under high-current PCB drops, external compensation or post-regulation LDOs are recommended instead of remote FB routing.
What is the maximum allowable IN-to-GND voltage during startup or transient conditions?
The absolute maximum IN-to-GND voltage is +6.5V. Exceeding this-even momentarily during hot-swap or load-dump events-may permanently damage the internal PFET. Designers must ensure input clamping (e.g., TVS diode) or upstream LDO limiting if system inputs exceed 6V under any condition.
Is the exposed thermal pad electrically isolated or connected internally?
The exposed thermal pad is electrically connected to GND internally and must be soldered to a PCB GND plane. It is not isolated. Failure to connect it results in degraded thermal performance (θJA increases from 50°C/W to >100°C/W) and potential thermal shutdown under 1A load.
How does the soft-start time affect inrush current in battery-powered systems?
The fixed 100µs soft-start time limits inrush current to <200mA during startup, preventing brownout on weak Li-ion cells or shared battery rails. This avoids triggering protection circuits in multi-rail battery systems and ensures reliable power-up without external soft-start components.
MPQ2128DG-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-TFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 1A
- Frequency - Switching:
- 2.8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (2x2)
MPQ2128DG-LF-P FAQ
1.How can I place an order for MPQ2128DG-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2128DG-LF-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 MPQ2128DG-LF-P reliable?
The price and inventory of MPQ2128DG-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2128DG-LF-P is usually 5 days.
3.What payment methods are accepted for MPQ2128DG-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2128DG-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2128DG-LF-P?
MPQ2128DG-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2128DG-LF-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 MPQ2128DG-LF-P?
For technical support, including MPQ2128DG-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2128DG-LF-P requirements.
6.How does Aetrix verify that MPQ2128DG-LF-P is sourced from the original manufacturer or authorized distributors?
All MPQ2128DG-LF-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 MPQ2128DG-LF-P meets industry standards.
7.What is the process for return or replacement of MPQ2128DG-LF-P?
All MPQ2128DG-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2128DG-LF-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 MPQ2128DG-LF-P part is unused and in its original packaging.
Return procedure for MPQ2128DG-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ2128DG-LF-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…
