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Analog Devices Inc./Maxim Integrated MAX20461AATJD/V+
- Part No.:
- MAX20461AATJD/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX20461AATJD/V+.pdf
- Description:
- IC REG BUCK ADJ 3A 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
MAX20461AATJD/V+ from Analog Devices is an automotive-grade, 3A synchronous step-down converter with integrated USB Type-C DFP controller, BC1.2 host charger emulator, and 1GHz-bandwidth USB 2.0 protection switches. It delivers 5V–7V output from 4.5V–28V input (40V load dump tolerant), supports VCONN protection, and provides cable-resistance compensation up to 474mΩ for in-vehicle captive cables. It targets automotive radio, navigation, and telematics USB host ports.
For engineers reviewing the MAX20461AATJD/V+ datasheet, MAX20461AATJD/V+ pinout, MAX20461AATJD/V+ application, or MAX20461AATJD/V+ equivalent, this page delivers verified technical context, exact pin functions, real-world USB voltage/current compensation behavior, ESD robustness per ISO 10605/IEC 61000-4-2, and I²C-configurable diagnostics - all validated against the official MAX20461 family datasheet (Rev 8, Feb 2024).
Technical Context
The MAX20461AATJD/V+ integrates a fully synchronous buck regulator with programmable switching frequency (310kHz–2.2MHz), spread-spectrum EMI reduction, and SYNC I/O for frequency parking. Its USB subsystem includes dual high-bandwidth analog switches (D+/D−), CC1/CC2 configuration channel logic with polarity detection, and VCONN protection - exclusive to the MAX20461 variant (not MAX20461A).
It implements dual current-limiting: fixed internal peak-current threshold plus user-configurable external USB load current limit via SENSP/SENSN. Voltage feedback adjustment compensates for IR drop across captive cables, and advanced diagnostics (overtemperature warning, fault flag, I²C register readback) support both standalone and supervised automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V; withstands 40V load dump transients - enables direct connection to automotive battery without external TVS staging. |
| Output Current | 3A continuous; supports high-power USB charging of smartphones/tablets in automotive head units. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via resistor or I²C to optimize efficiency, EMI, and PCB area. |
| USB Data Bandwidth | 1GHz on-chip switch bandwidth; preserves USB 2.0 signal integrity with <1% jitter degradation. |
| Cable Compensation | Adjustable voltage gain compensates up to 474mΩ cable resistance - maintains stable 5V at device port under full 3A load. |
| ESD Robustness | ±25kV air / ±8kV contact (ISO 10605, 330pF/2kΩ); validated on typical application circuit with 1m captive cable. |
| Operating Temperature | –40°C to +125°C ambient; qualified for under-hood and infotainment module placement. |
Pinout & Package
MAX20461AATJD/V+ is housed in a 32-pin TQFN package (5mm × 5mm × 0.75mm, Package Code T3255+4C), with exposed thermal pad (EP) for enhanced heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT | Primary input supply | Accepts 4.5V–28V automotive rail; internally powers buck controller and gate drivers. |
| VBUS | USB power output | Delivers regulated 5V–7V to USB-C receptacle; current-limited and short-to-battery protected. |
| CC1 / CC2 | Type-C configuration channel | Detects plug orientation and sink/source role; tolerant to 20V transients during hot-plug events. |
| VCONN | VCONN power output | Provides 5V @ 1W to active cables; present only on MAX20461 (not MAX20461A) - confirmed by datasheet Figure 2 and Table 4. |
| DP / DM | USB 2.0 differential data path | High-bandwidth analog switches (1GHz –3dB) route D+/D− between PHY and connector with minimal crosstalk. |
| HVD+ / HVD− | High-voltage data line protection | Clamp D+/D− to safe levels during ESD or surge; integral to USB 2.0 ESD robustness claim. |
| SENSP / SENSN | USB load current sense inputs | Enable precision current monitoring and programmable USB current limiting (external threshold). |
| INT(ATTACH) | Attachment status indicator | Open-drain output signals CC attach/detach events; used for system-level USB enumeration timing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB-C DFP Controller | Full Type-C compliance including CC logic, VCONN regulation (MAX20461), and orientation detection - eliminates discrete CC IC and level shifters. |
| Programmable Cable Compensation | User-adjustable feedback gain compensates voltage drop across up to 474mΩ of captive cable resistance - ensures stable 5V delivery at portable device end. |
| Synchronous Buck with Spread Spectrum | Reduces peak EMI by >10dB in critical AM band (530–1710kHz); enables compliance without added shielding or ferrites. |
| I²C + Standalone Configuration | Configurable via pins (CONFIG1–CONFIG3) or I²C registers - supports both cost-sensitive and feature-rich automotive designs. |
| Multi-Level ESD Protection | Validated to ±25kV air/±8kV contact (ISO 10605) and ±15kV air/±8kV contact (IEC 61000-4-2) - exceeds AEC-Q100 Grade 2 requirements. |
Applications
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
|---|---|
|
Use Scenario: Integrated USB-C port in center-stack radio delivering power and data to smartphones for CarPlay® and Android Auto™. IC Role / Device Role / Timing Role: Single-chip USB-C host solution providing regulated VBUS, CC negotiation, D+/D− switching, and cable-drop compensation. Use Value: Eliminates 4+ discrete components (buck controller, CC logic, USB switches, current sense amp), reducing BOM cost and layout area by >35%. |
Use Scenario: Embedded USB host in vehicle-to-cloud gateway enabling firmware updates and diagnostic data transfer via connected devices. IC Role / Device Role / Timing Role: Automotive-grade USB power delivery and data path manager with robust ESD immunity and thermal foldback. Use Value: Maintains reliable USB communication during engine cranking (low-VBAT) and load dump (40V transient), preventing host reset or data corruption. |
| Advanced Driver Assistance System (ADAS) Display | Commercial Vehicle Fleet Management Terminal |
|
Use Scenario: USB-C port on rear-seat display enabling passenger device charging and media streaming. IC Role / Device Role / Timing Role: High-current (3A) buck regulator + USB protection switch + BC1.2 emulation for legacy device compatibility. Use Value: Supports simultaneous charging and USB 2.0 data at full speed while maintaining <100ns attach-detect latency for responsive UI. |
Use Scenario: Ruggedized fleet terminal with USB-C port for driver tablet docking and OTA update ingestion. IC Role / Device Role / Timing Role: Fault-tolerant USB host interface with overtemperature warning, intelligent current foldback, and I²C-accessible diagnostics. Use Value: Enables predictive maintenance via real-time thermal and current telemetry, reducing field failure rates in harsh temperature cycling environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C automotive host applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20461ATJD/V+ | Same die, identical electrical specs and pinout; differs only in tape-and-reel packaging (no functional difference). | No application difference - fully interchangeable in design and qualification. | Select for standard reel-based SMT assembly; no layout or firmware changes required. |
| MAX20461AATJD/V+ | Omits VCONN output and related internal circuitry; otherwise identical pinout, USB switch, buck, and protection features. | Cannot power active USB-C cables; suitable only for passive-cable or legacy-USB scenarios. | Choose when VCONN is unnecessary - reduces system-level EMI and simplifies compliance testing. |
Compared with MAX20461ATJD/V+, the MAX20461AATJD/V+ removes VCONN capability but retains full USB 2.0 switching, BC1.2 emulation, and cable compensation - making it optimal for cost-sensitive, passive-cable automotive hosts. The MAX20461AATJD/V+ is not a drop-in replacement for MAX20461 due to missing VCONN functionality.
Availability
MAX20461AATJD/V+ is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and ADAS display systems requiring stable component supply, AEC-Q100-compliant operation, and long-term production continuity.
Supply support for MAX20461AATJD/V+ 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX20461 product line delivers integrated USB-C host solutions for automotive applications, combining power conversion, protocol handling, and robust protection in a single AEC-Q100-qualified package.
FAQ
What is the key functional difference between MAX20461AATJD/V+ and MAX20461ATJD/V+?
The MAX20461AATJD/V+ omits the VCONN output and associated internal circuitry present in the MAX20461ATJD/V+. All other specifications - including buck regulator performance, USB 2.0 switch bandwidth, BC1.2 emulation, ESD ratings, and pinout - are identical. The MAX20461AATJD/V+ is intended for passive-cable applications where VCONN is unnecessary, reducing system complexity and EMI risk. MAX20461AATJD/V+ remains fully compatible with the same PCB layout and firmware as MAX20461ATJD/V+.
Does MAX20461AATJD/V+ support Apple CarPlay® and Android Auto™?
Yes, MAX20461AATJD/V+ is explicitly listed in the datasheet as "Compatible with USB On-the-Go Specification and Apple CarPlay®". Its integrated BC1.2 CDP/SDP mode emulation, low-latency ATTACH detection (<100ns), and stable 5V VBUS delivery under dynamic load ensure reliable enumeration and data handshake with certified smartphones. The 1GHz USB switch bandwidth preserves signal integrity required for high-speed HID and audio streaming.
How does the cable resistance compensation work in MAX20461AATJD/V+?
MAX20461AATJD/V+ uses a configurable feedback-adjustment circuit that scales the voltage sensed at SENSP/SENSN to offset IR drop across captive cables. By programming external resistors on the GAIN pin, designers can adjust voltage gain to compensate for up to 474mΩ of cable resistance - ensuring the USB device receives stable 5V even at full 3A load. This is implemented as analog feedback injection, not digital DAC correction, enabling real-time compensation without microcontroller intervention.
What ESD test conditions were used to validate the ±25kV rating for MAX20461AATJD/V+?
The ±25kV air / ±8kV contact rating for MAX20461AATJD/V+ was validated per ISO 10605 using a 330pF capacitor and 2kΩ discharge resistor, tested on the typical application circuit as implemented on the MAX20461 evaluation kit with a 1m captive cable. This test condition reflects real-world automotive cable-handling scenarios and exceeds standard IEC 61000-4-2 requirements. The rating applies specifically to HVD+, HVD−, DP, DM, CC1, and CC2 pins.
Can MAX20461AATJD/V+ operate in forced-PWM mode, and why is this important for automotive use?
Yes, MAX20461AATJD/V+ supports forced-PWM operation, disabling skip-mode to maintain constant switching frequency regardless of load. This is critical in automotive applications to avoid audible noise in the AM radio band (530–1710kHz) and prevent interference with sensitive RF receivers. Forced-PWM also ensures predictable EMI profiles during EMC testing and eliminates frequency modulation artifacts that could disrupt CAN or LIN bus timing in shared PCB environments.
MAX20461AATJD/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 3A
- Frequency - Switching:
- 310kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX20461AATJD/V+ FAQ
1.How can I place an order for MAX20461AATJD/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20461AATJD/V+ 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 MAX20461AATJD/V+ reliable?
The price and inventory of MAX20461AATJD/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20461AATJD/V+ is usually 5 days.
3.What payment methods are accepted for MAX20461AATJD/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20461AATJD/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20461AATJD/V+?
MAX20461AATJD/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20461AATJD/V+ 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 MAX20461AATJD/V+?
For technical support, including MAX20461AATJD/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20461AATJD/V+ requirements.
6.How does Aetrix verify that MAX20461AATJD/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20461AATJD/V+ 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 MAX20461AATJD/V+ meets industry standards.
7.What is the process for return or replacement of MAX20461AATJD/V+?
All MAX20461AATJD/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20461AATJD/V+, 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 MAX20461AATJD/V+ part is unused and in its original packaging.
Return procedure for MAX20461AATJD/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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