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Analog Devices Inc./Maxim Integrated MAX20461AATJA/V+
- Part No.:
- MAX20461AATJA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX20461AATJA/V+.pdf
- Description:
- IC REG BUCK ADJ 3A 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:980
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Product details
Overview
MAX20461AATJA/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 remote cable-sense compensation for up to 474mΩ captive cable resistance. It serves as the core power and interface IC in automotive infotainment USB host ports.
For engineers reviewing the MAX20461AATJA/V+ datasheet, MAX20461AATJA/V+ pinout, MAX20461AATJA/V+ application, or MAX20461AATJA/V+ equivalent, key selection considerations include its automotive AEC-Q100 qualification, dual-mode (I²C/standalone) configuration, spread-spectrum EMI reduction, ±25kV ISO 10605 ESD rating on CC pins, and integrated current-sense amplifier for USB load monitoring.
Technical Context
The MAX20461AATJA/V+ integrates a fully synchronous buck regulator with programmable switching frequency (310kHz–2.2MHz), external SYNC I/O for frequency parking, and forced-PWM operation at no load. Its USB subsystem includes configurable CC1/CC2 logic, VCONN protection (MAX20461 variant), and high-bandwidth analog switches with <1.5pF on-capacitance and –35dB crosstalk at 480MHz.
Configuration is supported via I²C registers or external resistors (CONFIG1–CONFIG3), enabling flexible deployment in standalone or supervised systems. Diagnostics include real-time voltage/current measurement over I²C, interrupt-driven ATTACH detection, and fault reporting via dedicated FAULT pin with overtemperature warning and intelligent thermal foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V; withstands 40V automotive load dump transients without external clamping. |
| Output Voltage | 5V to 7V adjustable; supports dynamic compensation for voltage drop across captive cables up to 474mΩ. |
| Max Output Current | 3A continuous; enabled by integrated high-side/low-side MOSFETs and optimized thermal design in TQFN package. |
| Switching Frequency | 310kHz to 2.2MHz programmable; allows trade-off between efficiency, EMI, and PCB area-e.g., 2.2MHz enables use of 1µH inductors. |
| USB Data Bandwidth | 1GHz –3dB bandwidth; preserves USB 2.0 signal integrity with minimal jitter and crosstalk in high-noise automotive environments. |
| ESD Protection | ±25kV air / ±8kV contact (ISO 10605, 330pF/2kΩ); validated on CC1/CC2 pins in typical application circuit with 1m captive cable. |
| Operating Temp | –40°C to +125°C; qualified per AEC-Q100 Grade 1 for under-hood and head-unit deployment. |
Pinout & Package
The MAX20461AATJA/V+ is housed in a 32-pin, 5mm × 5mm × 0.75mm TQFN package (package code T3255+4C) with exposed thermal pad for enhanced heat dissipation in automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT | Main input supply | Accepts 4.5V–28V automotive battery rail; internally clamped to 40V during load dump events. |
| VBUS | USB power output | Regulated 5V–7V output driving USB port; includes short-to-battery protection and current limiting. |
| CC1 / CC2 | Type-C configuration channel | Detect plug orientation, source/sink role, and cable attachment; tolerant to 20V transients. |
| VCONN | VCONN power output | Provides 5V @ 1W to active cables; only present on MAX20461 (not MAX20461A); protected against shorts. |
| DP / DM | USB 2.0 data path | Low-capacitance (≤1.5pF), high-bandwidth (1GHz) analog switches preserving signal integrity up to 480Mbps. |
| SENSP / SENSN | USB load current sense | Differential inputs to internal current-sense amplifier; enable precise USB current monitoring and adaptive voltage compensation. |
| FAULT | Fault indicator output | Open-drain active-low signal indicating overtemperature, overcurrent, or USB fault conditions. |
| INT(ATTACH) | Attachment detection | Asserts on USB device attach/detach; supports interrupt-driven system wake-up and state management. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-qualified USB-C solution | Single-chip integration of buck converter, DFP controller, BC1.2 emulator, and ESD-hardened USB switches meets AEC-Q100 Grade 1 and ISO 10605 requirements. |
| Remote cable-sense compensation | User-programmable gain adjusts VBUS output to offset IR drop across captive cables-enabling stable 5V delivery even with 474mΩ resistance. |
| Configurable USB current limit | Combines fixed internal peak-current threshold with user-configurable external sense resistor for precise 0.5A–3A USB load control. |
| Spread-spectrum & SYNC I/O | Reduces peak EMI by >10dB; SYNC pin enables synchronization to external clock or frequency parking to avoid AM band interference. |
| Multi-mode configuration | Supports both I²C register programming and resistor-based standalone setup-enabling flexibility across production and diagnostic firmware strategies. |
Applications
| Automotive Radio Head Unit | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Providing regulated 5V USB power and data connectivity to smartphones in vehicle infotainment systems with long captive cables. IC Role / Device Role / Timing Role: Primary USB-C host power delivery and interface controller; manages VBUS regulation, CC negotiation, and DP/DM signal routing. Use Value: Eliminates need for discrete buck converter, USB switch, and BC1.2 emulator-reducing BOM count by ≥7 components and PCB area by >35%. | Use Scenario: Enabling USB OTG functionality in connected vehicle gateways supporting Apple CarPlay® and Android Auto™. IC Role / Device Role / Timing Role: Dual-role capable DFP controller with ATTACH detection and I²C-accessible diagnostics for runtime health monitoring. Use Value: Delivers deterministic attach/detach response (<10ms) and real-time current/voltage telemetry over I²C-critical for cloud-connected diagnostics. |
| Automotive Navigation System | Advanced Driver Assistance Systems (ADAS) HUD Interface |
Use Scenario: Powering and communicating with portable navigation devices via rear-seat USB ports subject to wide temperature swings and EMI. IC Role / Device Role / Timing Role: High-reliability USB host controller with –40°C to +125°C operation, ±25kV ESD protection, and spread-spectrum switching. Use Value: Maintains USB 2.0 link stability under 100V/µs common-mode noise and prevents reset events during cold-cranking (4.5V start). | Use Scenario: Supporting firmware updates and debugging via USB-C on HUD control modules mounted near instrument clusters. IC Role / Device Role / Timing Role: Robust USB interface with short-to-battery protection on VBUS/HVD± pins and thermal warning/foldback for sustained operation. Use Value: Prevents latch-up during 12V battery jump-start events and avoids thermal shutdown during extended OTA update sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C host power delivery applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20461ATJA/V+ | Same die, different temperature grade: –40°C to +105°C vs. –40°C to +125°C; lacks VCONN support. | Targeted at non-under-hood applications such as center console USB hubs where ambient temperature remains <105°C. | Select when full Grade 1 AEC-Q100 qualification is not required and VCONN is unused. |
| TPS65987D | Non-automotive USB-C PD controller with integrated 3A buck; no AEC-Q100 rating, lower ESD (±8kV), no load-dump tolerance. | Suitable for consumer docking stations but not automotive due to missing 40V transient handling and thermal spec. | Consider only for non-automotive designs requiring USB PD 3.0 compliance and higher power negotiation. |
Compared with MAX20461ATJA/V+, the MAX20461AATJA/V+ adds full AEC-Q100 Grade 1 qualification and VCONN capability-making it the only choice for head-unit and under-hood USB host applications. Versus TPS65987D, it trades PD protocol flexibility for automotive robustness, ESD immunity, and integrated cable compensation.
Availability
MAX20461AATJA/V+ is available at Aetrix Electronics and suitable for automotive radio head units, telematics control units, and navigation systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX20461AATJA/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 was designed specifically for automotive USB-C host applications-integrating power conversion, interface control, and protection into a single AEC-Q100-qualified device to simplify infotainment system design.
FAQ
What is the primary function of the MAX20461AATJA/V+ in an automotive USB system?
The MAX20461AATJA/V+ serves as a complete automotive-qualified USB-C host power delivery and interface IC. It combines a 3A synchronous buck converter (4.5V–28V input, 5V–7V output), USB Type-C DFP controller with VCONN protection, BC1.2 host charger emulation, and 1GHz-bandwidth USB 2.0 protection switches-all in a single 5mm × 5mm TQFN package. Its integrated current-sense amplifier and remote cable-sense compensation ensure stable 5V delivery across long captive cables.
Does the MAX20461AATJA/V+ support both I²C and resistor-based configuration?
Yes, the MAX20461AATJA/V+ supports dual-mode configuration: I²C register programming via SDA/SCL pins for dynamic runtime control, and standalone setup using external resistors on CONFIG1–CONFIG3 pins for fixed-function deployment. This flexibility enables use in both firmware-updatable head units and cost-optimized infotainment modules without microcontroller dependency.
What automotive qualifications does the MAX20461AATJA/V+ meet?
The MAX20461AATJA/V+ is qualified to AEC-Q100 Grade 1 (–40°C to +125°C), supports 40V load dump transients per ISO 7637-2, and achieves ±25kV air / ±8kV contact ESD protection per ISO 10605 (330pF/2kΩ) on CC1/CC2 pins. These ratings are verified in the typical application circuit with a 1m captive cable, confirming suitability for front-end automotive USB host ports.
How does the MAX20461AATJA/V+ compensate for voltage drop across automotive USB cables?
The MAX20461AATJA/V+ uses a differential current-sense amplifier (SENSP/SENSN inputs) and a user-programmable feedback-adjustment circuit to dynamically increase VBUS output voltage based on measured USB load current. This compensates for IR drop across captive cables up to 474mΩ-ensuring stable 5V delivery at the connected device regardless of cable resistance or current draw.
Is the MAX20461AATJA/V+ pin-compatible with other variants in the MAX20461 family?
No, the MAX20461AATJA/V+ is not pin-compatible with MAX20461ATJA/V+ or MAX20461EVKIT#. The "A" suffix denotes the VCONN-capable variant with distinct CC_POL and VCONN pin functions. Pin mapping differs between MAX20461 (VCONN-enabled) and MAX20461A (VCONN-disabled) versions-requiring separate PCB layouts. Always verify pin configurations in the official datasheet before design-in.
MAX20461AATJA/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)
MAX20461AATJA/V+ FAQ
1.How can I place an order for MAX20461AATJA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20461AATJA/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 MAX20461AATJA/V+ reliable?
The price and inventory of MAX20461AATJA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20461AATJA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20461AATJA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20461AATJA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20461AATJA/V+?
MAX20461AATJA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20461AATJA/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 MAX20461AATJA/V+?
For technical support, including MAX20461AATJA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20461AATJA/V+ requirements.
6.How does Aetrix verify that MAX20461AATJA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20461AATJA/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 MAX20461AATJA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20461AATJA/V+?
All MAX20461AATJA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20461AATJA/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 MAX20461AATJA/V+ part is unused and in its original packaging.
Return procedure for MAX20461AATJA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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