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Analog Devices Inc./Maxim Integrated MAX20461ATJB/V+T
- Part No.:
- MAX20461ATJB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX20461ATJB/V+T.pdf
- Description:
- IC REG BUCK ADJ 3A 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,101
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Product details
Overview
MAX20461ATJB/V+T from Analog Devices is an automotive-grade, 3A synchronous step-down converter with integrated USB Type-C DFP controller, BC1.2 host charger emulator, 1GHz USB 2.0 protection switches, and cable-voltage compensation circuitry-designed for direct battery-to-USB port power delivery in automotive radio, navigation, and telematics systems.
For engineers reviewing the MAX20461ATJB/V+T datasheet, MAX20461ATJB/V+T pinout, MAX20461ATJB/V+T application, or MAX20461ATJB/V+T equivalent, this device supports programmable switching frequency (310kHz–2.2MHz), ±25kV ISO 10605 ESD protection on CC pins, I²C-configurable USB current limit and VBUS compensation, and robust short-to-battery protection on VBUS/HVD± pins.
Technical Context
The MAX20461ATJB/V+T integrates a fully synchronous buck regulator with internal high-side/low-side MOSFETs, external SYNC input/output for frequency parking, and spread-spectrum modulation to reduce EMI. Its USB subsystem includes dual 1GHz bandwidth analog switches, CC1/CC2 configuration channel logic with polarity detection, and VCONN supply (MAX20461 variant only).
It implements intelligent skip-mode operation with attach/detach detection, configurable forced-PWM at no load, and a dedicated USB load current-sense amplifier (SENSP/SENSN) enabling real-time voltage drop compensation across captive cables up to 474mΩ. Diagnostics are accessible via I²C-including fault reporting, thermal warning, and overtemperature foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V (withstands 40V load dump); enables direct connection to automotive battery rail without pre-regulation. |
| Output Voltage & Current | 5V to 7V, up to 3A continuous; supports USB-C DFP power delivery with adjustable output for cable IR drop compensation. |
| Switching Frequency | Programmable 310kHz–2.2MHz; allows optimization of efficiency, EMI, and PCB area via resistor or I²C control. |
| USB Data Switch Bandwidth | 1GHz –- preserves signal integrity for USB 2.0 high-speed (480Mbps) data paths with minimal crosstalk. |
| ESD Protection | ±25kV air / ±8kV contact per ISO 10605 (330pF, 2kΩ) on CC1/CC2; meets stringent automotive EMC requirements. |
| Operating Temperature | −40°C to +125°C ambient; qualified for under-hood and infotainment module deployment. |
| Package | 32-pin TQFN (5mm × 5mm × 0.75mm); thermally enhanced for high-power density in space-constrained automotive layouts. |
Pinout & Package
The MAX20461ATJB/V+T is housed in a 32-pin, 5mm × 5mm × 0.75mm TQFN package (package code T3255+4C) with exposed thermal pad for efficient heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT | Primary input supply | Accepts 4.5V–28V automotive battery input; internally powers DC-DC controller and gate drivers. |
| VBUS | USB power output | Delivers regulated 5V–7V to USB-C receptacle; includes short-to-battery protection and current limiting. |
| CC1 / CC2 | Configuration Channel | Detects cable orientation, sink/source role, and VCONN enable; tolerant to 20V transients. |
| SENSP / SENSN | USB load current sense | Differential inputs for current-sense amplifier; enables real-time VBUS compensation for cable resistance. |
| HVDP / HVDM | High-voltage USB data protection | Clamps D+/D− lines during ESD events; supports 1GHz bandwidth with low on-capacitance (<12pF). |
| SYNC | Frequency synchronization | Allows master-slave clock alignment or frequency parking to avoid sensitive AM band interference. |
| INT(ATTACH) | Attachment status indicator | Open-drain output signals USB device attach/detach events for system-level power management. |
| I²C SDA/SCL | Configuration & diagnostics interface | Enables read/write access to 16-bit register map for USB current limit, voltage gain, fault status, and thermal warnings. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB-C DFP Controller | Compliant with USB Type-C specification; provides VCONN power (MAX20461 variant), CC polarity detection, and attach/detach logic. |
| Automotive-Optimized Buck Regulator | Synchronous design with internal 3.5A RMS MOSFETs; supports spread-spectrum and forced-PWM modes to meet CISPR 25 Class 5 noise limits. |
| Dynamic Cable Compensation | User-programmable voltage gain adjusts VBUS output to offset up to 474mΩ cable resistance-ensuring stable 5V at portable device connector. |
| Robust Fault Protection | Includes short-to-battery on VBUS/HVD±, overtemperature warning + foldback, and ±25kV ISO 10605 ESD on CC pins-validated per AEC-Q100 stress tests. |
| I²C + Standalone Configuration | Configurable via external resistors (CONFIG1–CONFIG3) or I²C registers-enabling flexible integration in both supervised and autonomous automotive modules. |
Applications
| Automotive Radio Head Unit | Telematics Control Unit (TCU) |
|---|---|
|
Use Scenario: Powering USB-C ports in OEM infotainment head units with captive cables routed through dashboard assemblies. IC Role / Device Role / Timing Role: Single-chip USB-C host power manager delivering regulated 5V/3A while compensating for voltage drop across long, fixed-length cables. Use Value: Eliminates need for external LDOs or discrete current-sense circuits; maintains 5V ±5% at device port despite >200mΩ cable resistance. |
Use Scenario: Enabling USB-C connectivity in vehicle-to-cloud communication modules requiring reliable charging and data transfer during vibration and thermal cycling. IC Role / Device Role / Timing Role: Automotive-grade USB host charger emulator supporting BC1.2 CDP/SDP modes and Apple CarPlay® handshake protocols. Use Value: Ensures interoperability with legacy and modern smartphones; supports simultaneous charging and high-speed data sync without host MCU intervention. |
| Navigation System with Dual USB Ports | Connected Rear-Seat Entertainment |
|
Use Scenario: Dual-port USB-C implementation in center console navigation systems where one port serves as host and the other as peripheral. IC Role / Device Role / Timing Role: Integrated USB 2.0 protection switches with 1GHz bandwidth preserve signal integrity for video/audio streaming over USB. Use Value: Prevents data corruption during hot-plug events; maintains <−30dB crosstalk between D+/D− lines across full temperature range. |
Use Scenario: Powering rear-seat USB-C ports in premium vehicles where ESD exposure risk is elevated due to frequent passenger interaction. IC Role / Device Role / Timing Role: High-reliability USB interface IC with ±25kV air-gap ESD protection on CC1/CC2 and integrated thermal monitoring. Use Value: Reduces field failure rate from electrostatic discharge; triggers graceful current foldback before junction temperature exceeds 150°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C automotive host power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20461AATJB/V+T | Omits VCONN output circuitry; identical DC-DC, USB switch, and BC1.2 functionality. | Not suitable for USB-C cables requiring VCONN power (e.g., active cables, e-marked accessories). | Select MAX20461AATJB/V+T when VCONN is unnecessary-reduces BOM cost and simplifies layout. |
| TPS65987DHLR | Single-chip USB-C PD controller with integrated 3.3V/1.8V LDOs; lacks integrated buck regulator and USB 2.0 switches. | Requires external 5V buck converter and discrete USB data switches; targets USB-C PD sink/host dual-role, not automotive-specific robustness. | Choose TPS65987DHLR for USB-C PD 3.0 compliance and dual-role flexibility; use MAX20461ATJB/V+T for integrated 3A buck + automotive ESD/thermal hardening. |
Compared with MAX20461AATJB/V+T, the MAX20461ATJB/V+T adds VCONN support for active cables but shares identical USB current sensing, cable compensation, and 3A buck performance. Against TPS65987DHLR, MAX20461ATJB/V+T delivers higher integration (no external buck or switches needed) and superior automotive qualification (AEC-Q100, ISO 10605, load dump tolerance).
Availability
MAX20461ATJB/V+T is available at Aetrix Electronics and suitable for automotive radio head units, telematics control units, and connected navigation systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX20461ATJB/V+T 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 MAX20461ATJB/V+T belongs to Analog Devices' automotive power and interface product line, engineered specifically for robust, integrated USB-C host solutions in harsh vehicular environments-emphasizing ESD resilience, thermal stability, and functional safety readiness.
FAQ
What is the primary function of the MAX20461ATJB/V+T in an automotive USB system?
The MAX20461ATJB/V+T serves as a single-chip automotive USB-C host power manager, integrating a 3A synchronous buck converter, USB Type-C DFP controller with VCONN, BC1.2 host charger emulation, and 1GHz USB 2.0 protection switches. It delivers regulated 5V–7V power to the USB-C port while compensating for voltage drop across captive cables and protecting against ESD, load dump, and thermal faults-making it ideal for radio head units and telematics modules.
Does the MAX20461ATJB/V+T support USB On-The-Go (OTG) functionality?
Yes, the MAX20461ATJB/V+T supports USB On-The-Go and dual-role applications through its configurable CC1/CC2 logic, ATTACH detection, and I²C-accessible register map. It enables automatic role negotiation (host/peripheral) and complies with the USB OTG specification, including handshake compatibility with Apple CarPlay®-all without requiring external level shifters or discrete USB switches.
How does the MAX20461ATJB/V+T compensate for voltage drop in automotive USB cables?
The MAX20461ATJB/V+T uses its differential current-sense amplifier (SENSP/SENSN) to monitor USB load current and applies user-programmable voltage gain to increase VBUS output-offsetting IR drop across captive cables up to 474mΩ. This remote-sense feedback adjustment ensures stable 5V delivery at the portable device connector, even with long, fixed-length wiring harnesses typical in automotive installations.
What ESD protection levels does the MAX20461ATJB/V+T provide on its CC pins?
The MAX20461ATJB/V+T provides ±25kV air-gap and ±8kV contact ESD protection on CC1 and CC2 pins per ISO 10605 (330pF, 2kΩ), validated in the typical application circuit with a 1m captive cable. This exceeds standard automotive requirements and ensures reliable operation in high-static environments like vehicle cabins with synthetic upholstery and dry climates.
Can the MAX20461ATJB/V+T be configured without an I²C host microcontroller?
Yes, the MAX20461ATJB/V+T supports standalone configuration using external resistors on CONFIG1–CONFIG3 pins to set USB current limit, voltage gain, and operating mode-enabling deployment in systems without I²C capability. I²C remains available for advanced diagnostics, real-time parameter tuning, and fault logging, but is not required for basic USB host operation.
MAX20461ATJB/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 275kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX20461ATJB/V+T FAQ
1.How can I place an order for MAX20461ATJB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20461ATJB/V+T 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 MAX20461ATJB/V+T reliable?
The price and inventory of MAX20461ATJB/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20461ATJB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20461ATJB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20461ATJB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20461ATJB/V+T?
MAX20461ATJB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20461ATJB/V+T 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 MAX20461ATJB/V+T?
For technical support, including MAX20461ATJB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20461ATJB/V+T requirements.
6.How does Aetrix verify that MAX20461ATJB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20461ATJB/V+T 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 MAX20461ATJB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20461ATJB/V+T?
All MAX20461ATJB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20461ATJB/V+T, 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 MAX20461ATJB/V+T part is unused and in its original packaging.
Return procedure for MAX20461ATJB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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