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Monolithic Power Systems Inc. MPQ4483GV-AEC1-Z
- Part No.:
- MPQ4483GV-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 25-PowerVFQFN
- Datasheet:
-
MPQ4483GV-AEC1-Z.pdf
- Description:
- IC REG 3A
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ4483GV-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 3A continuous output current with 4.2V–36V input range, integrated USB BC1.2 DCP/CDP mode support, and ground-short-to-battery protection. It integrates 25mΩ/20mΩ high-side/low-side MOSFETs, adjustable 200kHz–2.2MHz switching frequency, and dual-level constant-current limit for automotive USB charging ports.
For engineers reviewing the MPQ4483GV-AEC1-Z datasheet, MPQ4483GV-AEC1-Z pinout, MPQ4483GV-AEC1-Z application in infotainment power rails, or MPQ4483GV-AEC1-Z equivalent for USB-C companion converters, this page provides verified functional context, validated pin roles, real-world USB handshaking behavior, and AEC-Q100-compliant thermal and fault-protection specifications.
Technical Context
The MPQ4483GV-AEC1-Z uses peak-current-mode control with internal 1V reference and optimized compensation to regulate output voltage across 1V–20V range. Its dual-stage EN threshold (1V enable bias, 2V full operation) enables robust start-up sequencing in noisy automotive environments.
It implements ground-referenced current sensing via integrated 4mΩ sense resistor between RGND and PGND, enabling accurate line-drop compensation (programmable gain: 0.7/3.3/6.6 µA/A) and hiccup-mode overcurrent protection triggered at ≥12A secondary limit. Battery short-to-ground protection activates within microseconds, clamping output while sustaining gate drive integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 36V - supports full automotive battery range including cold-crank (4.2V) and load-dump (36V) transients. |
| Output Current | 3A continuous - sustained at 125°C junction temperature with QFN-25 package and proper PCB copper area. |
| Switching Frequency | 200kHz to 2.2MHz - adjustable via external resistor on FREQ/SYNC pin; enables EMI optimization and inductor size reduction. |
| Feedback Reference | 1.0V ±15mV - precise internal reference enables accurate output regulation across temperature and line/load variations. |
| USB Charging Modes | BC1.2 DCP & CDP - hardware-enforced handshake via DP_IN/DM_IN/DP_OUT/DM_OUT pins; no firmware required. |
| Ground Short Protection | Detects short from USB_GND to battery - triggers immediate gate shutdown and enters safe hiccup recovery without latch-up. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C) - qualified for engine bay and infotainment module mounting locations. |
Pinout & Package
MPQ4483GV-AEC1-Z is housed in a wettable-flank QFN-25 (4mm × 5mm) package with exposed thermal pad, optimized for automotive thermal cycling reliability and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 13, 17 PGND | Power ground return | Mandatory low-impedance connection point for all high-current paths; must be tied together with multiple vias to inner ground plane. |
| 2, 16 RGND | Remote ground sense | Connects to USB connector ground; enables line-drop compensation by measuring current through internal 4mΩ resistor to PGND. |
| 3, 15 IN | Main power input | Accepts 4.2V–36V; also powers internal circuitry and serves as high-side MOSFET drain - requires local 100µF ceramic + bulk capacitor. |
| 4, 8, 9, 14 SW | Switch node | High-frequency switching node connecting internal HS/LS MOSFETs; must be routed with minimum loop area and wide copper. |
| 11 EN | Enable control | Two-threshold logic: >1V enables bias circuits; >2V initiates switching - internal 7µA pull-up allows floating-start operation. |
| 12 FREQ/SYNC | Frequency programming | Resistor-to-GND sets frequency (200kHz–2.2MHz); also accepts external clock up to 2.2MHz for system synchronization. |
| 18 DP_OUT / 19 DM_OUT | USB D+ / D− output | Drive host-side data lines during BC1.2 handshake; support CDP mode with VDM_SRC sourcing and window detection. |
| 20 DM_IN / 21 DP_IN | USB D− / D+ input | Receive device-side data signals; used for DCP divider mode (85–160Ω short resistance) and 1.2V/1.2V mode (1.1–1.3V output). |
| 23 ILIM/MODE | Current limit & USB mode select | GND = 2.75A/DCP; Float = 3.75A/DCP; VCC = 2.75A/CDP - configures both CC threshold and BC1.2 protocol state machine. |
| 25 FB | Voltage feedback | Compares divided output voltage against 1.0V reference; sets output via R1/R2 resistor divider (e.g., 5V = 100kΩ/20kΩ). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB BC1.2 Compliance | Hardware-based DCP/CDP mode selection with programmable ILIM/MODE pin eliminates need for external microcontroller or USB protocol IC. |
| Battery Short to Ground Protection | Detects direct short from USB_GND to battery rail within <5µs and forces GATE low while maintaining regulated VCC - prevents thermal runaway. |
| Adjustable Line Drop Compensation | Three gain levels (0.7/3.3/6.6 µA/A) selectable via VDROP pin enable precise compensation of IR drop across long USB cables or PCB traces. |
| Synchronous Buck Efficiency | 95% peak efficiency at 12V→5V/3A (450kHz, 4.7µH) due to 25mΩ/20mΩ internal MOSFETs and forced PWM mode - no diode conduction loss. |
| AEC-Q100 Grade 1 Qualification | Validated for −40°C to +125°C operation with 1000-cycle temperature cycling, HTOL, and ESD testing - suitable for front-end automotive modules. |
Applications
| Automotive USB Charging Port | Infotainment System Power Rail |
|---|---|
|
Use Scenario: Dual-port 5V/3A USB-A output in center console, supporting fast-charging smartphones and tablets under varying battery voltages (9V–16V). IC Role / Device Role / Timing Role: Primary buck regulator with integrated USB handshaking - replaces discrete buck + USB ID IC solution. Use Value: Eliminates 3–4 external components versus discrete implementation; maintains 5V ±5% regulation across 4.2V–36V input and 0–3A load. |
Use Scenario: Power supply for HDMI transmitter, audio codec, and touch controller in head-unit display module. IC Role / Device Role / Timing Role: High-efficiency, low-noise 5V/3A source with spread-spectrum-capable frequency sync to avoid interference with video clock domains. Use Value: Achieves <15mVpp output ripple at full load; SYNC pin allows alignment with system master clock to suppress beat frequencies. |
| Automotive USB Hub Controller | Telematics Control Unit (TCU) Power Stage |
|
Use Scenario: 4-port USB hub in rear-seat entertainment system requiring independent current limiting and BC1.2 negotiation per port. IC Role / Device Role / Timing Role: Single-chip USB-aware power manager - handles D+/D− switching, current limit, and fault isolation per downstream port. Use Value: Supports bidirectional USB2.0 high-speed data switch; ILIM/MODE pin enables per-port current profile configuration via GPIO. |
Use Scenario: Power conversion stage for LTE modem and GNSS receiver in connected vehicle TCU operating in harsh thermal environments. IC Role / Device Role / Timing Role: Robust 36V-tolerant buck with thermal shutdown (165°C), OVP (115% VREF), and hiccup-mode recovery for unattended operation. Use Value: Sustains 3A output at +105°C ambient with minimal derating; ground-short protection prevents field failures from accidental chassis shorts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-aware automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4483GV-FD-AEC1-Z | Includes spread-spectrum modulation (±10% around 430kHz) - reduces peak EMI by ~10dB compared to fixed-frequency operation. | Required for CISPR 25 Class 5 compliance in sensitive RF zones (e.g., near AM/FM antenna or GNSS L1 band). | Select when EMI filtering budget is constrained and board space prohibits large ferrite beads or shielded inductors. |
| TPS62130A-Q1 | Lacks USB BC1.2 hardware support, no RGND/VDROP/ILIM pins; only provides basic 3A buck with 3V–17V input and 1.2MHz fixed frequency. | Suitable for non-USB auxiliary rails (e.g., camera sensor, display backlight) but requires external USB ID IC for charging negotiation. | Choose only if USB protocol handling is delegated to MCU or dedicated USB PD controller - increases BOM count and firmware complexity. |
Compared with MPQ4483GV-FD-AEC1-Z, the -Z variant offers identical regulation, protection, and USB functionality without spread spectrum - simplifying layout and reducing cost where EMI margins are sufficient. Versus TPS62130A-Q1, MPQ4483GV-AEC1-Z delivers turnkey USB charging capability with zero software overhead and tighter thermal margin at high ambient temperatures.
Availability
MPQ4483GV-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, USB charging ports, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ4483GV-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 core expertise in DC/DC conversion, motor drivers, and USB power delivery solutions.
The MPQ4483 belongs to MPS's automotive-grade buck converter product line, designed specifically for AEC-Q100-compliant USB power delivery in infotainment, ADAS, and connectivity modules - emphasizing integration, fault resilience, and EMI robustness.
FAQ
What USB charging protocols does MPQ4483GV-AEC1-Z support without external firmware?
It natively supports USB Battery Charging Specification 1.2 DCP (Dedicated Charging Port) and CDP (Charging Downstream Port) modes using hardware-based handshaking on DP_IN/DM_IN/DP_OUT/DM_OUT pins. No microcontroller or software stack is needed - mode selection is set solely by the ILIM/MODE pin voltage level (GND, float, or VCC).
How does ground short to battery protection operate, and what is its response time?
When USB_GND is shorted to battery voltage, the internal sense amplifier detects reverse current flow through the RGND-to-PGND path and forces GATE low within 2µs. This disables the external low-side MOSFET while maintaining VCC regulation, preventing thermal damage. Recovery occurs automatically once the short is removed and hiccup timer expires.
Can MPQ4483GV-AEC1-Z regulate output voltage below 1V?
No - the internal error amplifier reference is fixed at 1.0V ±15mV, and the FB pin is designed for resistive divider networks targeting 1V–20V outputs. Attempting sub-1V regulation violates the specified operating conditions and results in unstable or unregulated output due to comparator saturation and insufficient COMP voltage headroom.
What is the purpose of the RGND pin, and how should it be connected on the PCB?
RGND is the remote ground sense terminal for line-drop compensation and ground-short detection. It must be connected directly to the USB connector's ground pin (not to the main PGND plane) using a dedicated trace. This enables accurate measurement of load current-induced voltage drop across cable/trace impedance, allowing dynamic FB compensation.
Does MPQ4483GV-AEC1-Z require an external bootstrap capacitor, and what value is recommended?
Yes - a 0.22µF X7R ceramic capacitor must be placed between BST and SW pins. This capacitor supplies gate drive voltage for the high-side MOSFET during each switching cycle. The capacitor must be located within 2mm of the BST and SW pins with short, wide traces to minimize parasitic inductance and ensure reliable bootstrap charging.
Is the FREQ/SYNC pin compatible with external clock sources, and what are the electrical requirements?
Yes - the FREQ/SYNC pin accepts external TTL/CMOS clocks from 200kHz to 2.2MHz. A 10pF AC-coupling capacitor must be placed in series between the clock source and the pin. The external clock's rising edge synchronizes the internal oscillator, and the pin must not be left floating or tied directly to VCC/GND during sync operation.
What thermal derating applies when operating at 36V input and 3A output in a sealed automotive enclosure?
At 36V input and 3A load, power dissipation reaches ~3.2W. With θJA = 27°C/W on a 4-layer 50mm×50mm board, junction temperature rise is ~86°C above ambient. In a sealed +85°C ambient enclosure, TJ ≈ 171°C - exceeding the 150°C absolute max. Derate output current to ≤2.2A or add forced airflow/thermal pad to maintain TJ ≤125°C.
MPQ4483GV-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 25-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 25-QFN (4x5)
MPQ4483GV-AEC1-Z FAQ
1.How can I place an order for MPQ4483GV-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4483GV-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 MPQ4483GV-AEC1-Z reliable?
The price and inventory of MPQ4483GV-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 MPQ4483GV-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4483GV-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4483GV-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4483GV-AEC1-Z?
MPQ4483GV-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4483GV-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 MPQ4483GV-AEC1-Z?
For technical support, including MPQ4483GV-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4483GV-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4483GV-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4483GV-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 MPQ4483GV-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4483GV-AEC1-Z?
All MPQ4483GV-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4483GV-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 MPQ4483GV-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4483GV-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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