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Analog Devices Inc./Maxim Integrated MAX20461ATJD/V+
- Part No.:
- MAX20461ATJD/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX20461ATJD/V+.pdf
- Description:
- IC REG BUCK ADJ 3A 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:440
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Product details
Overview
MAX20461ATJD/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 serves as the core power and interface IC in automotive infotainment USB host ports.
For engineers reviewing the MAX20461ATJD/V+ datasheet, MAX20461ATJD/V+ pinout, MAX20461ATJD/V+ application, or MAX20461ATJD/V+ equivalent, key selection considerations include its dual-mode (I²C/standalone) configuration, ±25kV ISO 10605 ESD rating on CC/HVD pins, spread-spectrum EMI reduction, intelligent thermal foldback, and support for USB On-The-Go and Apple CarPlay®.
Technical Context
The MAX20461ATJD/V+ integrates a fully synchronous buck regulator with internal high-side and low-side MOSFETs, programmable switching frequency (310kHz–2.2MHz), and SYNC I/O for frequency parking. Its USB subsystem includes dual 1GHz bandwidth analog switches, CC1/CC2 transients tolerance (20V), and VCONN protection - exclusive to the MAX20461 (not MAX20461A).
It implements a dual-threshold USB current limit (fixed internal peak + user-configurable external sense), remote voltage feedback adjustment for cable drop compensation, and advanced diagnostics via I²C including fault reporting, temperature warning, and attach/detach event detection. All functions operate across –40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V; withstands 40V load dump transients per ISO 7637-2, enabling direct connection to automotive battery rail. |
| Output Voltage | 5V to 7V adjustable; supports dynamic compensation for up to 474mΩ cable resistance using SENSP/SENSN feedback. |
| Max Output Current | 3A continuous; delivered by integrated synchronous MOSFETs with 3.5A RMS LX current rating. |
| Switching Frequency | 310kHz to 2.2MHz programmable; enables optimization of efficiency, EMI, and external component size. |
| USB Data Bandwidth | 1GHz on-chip switch bandwidth; preserves USB 2.0 signal integrity (480Mbps) with <0.5dB insertion loss at 240MHz. |
| ESD Protection | ±25kV air / ±8kV contact ISO 10605 (330pF, 2kΩ) on CC1/CC2/HVD±; meets automotive EMC robustness requirements. |
| Operating Temp | –40°C to +125°C junction; qualified per AEC-Q100 Grade 1, suitable for under-dash and head-unit mounting. |
Pinout & Package
MAX20461ATJD/V+ is housed in a 32-pin TQFN package (5mm × 5mm × 0.75mm, Package Code T3255+4C), with exposed thermal pad (EP) connected to PGND for enhanced thermal performance. Pin pitch is 0.5mm.
| 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. |
| LX | Switch node | Connects to external inductor; carries high-frequency pulsed current; requires low-inductance layout to minimize EMI. |
| PGND | Power ground | High-current return path for buck converter and USB switches; must be tied to EP for thermal conduction. |
| AGND | Analog ground | Reference for sensitive analog circuits (SENSE, CC detection); isolated from PGND to reduce noise coupling. |
| CC1 / CC2 | Type-C configuration channel | Detect plug orientation and source/sink role; tolerate 20V transients and support VCONN sourcing (MAX20461 only). |
| HVDP / HVDM | High-voltage data protection | Clamp D+/D– lines during ESD events; enable ±25kV ISO 10605 compliance without external TVS diodes. |
| SENSP / SENSN | USB load current sense inputs | Enable remote sensing of VBUS drop across captive cable; feed into internal amplifier for automatic voltage compensation. |
| I2C (SDA/SCL) | Configuration & diagnostics bus | Supports read/write of 16-bit register map for real-time monitoring of faults, temperature, current, and attach status. |
Key Features
| Feature | Design Value |
|---|---|
| VCONN protection circuitry | Integrated 5V LDO with current limiting and thermal shutdown; exclusive to MAX20461 (not MAX20461A), enables active cable support. |
| Spread-spectrum modulation | Reduces peak EMI by >10dB across 100kHz–1GHz range; eliminates need for additional EMI filters in AM-band-sensitive head units. |
| Intelligent thermal foldback | Gradually reduces output current above 115°C junction while maintaining regulation - prevents sudden shutdown during sustained thermal stress. |
| Configurable USB current limit | User-selectable threshold (0.5A–3A) via external resistor or I²C register; avoids overcurrent damage to portable devices during hot-plug events. |
| Attach/detach detection logic | Dedicated INT(ATTACH) pin with programmable debounce; enables host MCU to wake on cable connect/disconnect without polling. |
Applications
| Automotive Radio Head Unit | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Integrated USB-C port in OEM radio head unit delivering power and data to smartphones for CarPlay® and Android Auto™. IC Role / Device Role / Timing Role: Single-chip USB-C host power delivery and protection controller; manages VBUS regulation, CC negotiation, and ESD-safe data switching. Use Value: Eliminates discrete USB protection ICs and buck controller, reducing BOM count by ≥7 components and PCB area by 35%. |
Use Scenario: Embedded USB host in vehicle telematics module supporting firmware updates and diagnostic tool connectivity. IC Role / Device Role / Timing Role: Automotive-grade USB-C DFP with BC1.2 CDP/SDP emulation and robust fault handling for unattended operation. Use Value: Enables reliable hot-plug detection and ±25kV ESD immunity in harsh vibration/temperature environments without external protection. |
| In-Vehicle Connectivity Hub | Automotive Infotainment Gateway |
Use Scenario: Multi-port USB-C hub in center console providing simultaneous charging and data to multiple devices. IC Role / Device Role / Timing Role: Dual-role capable USB host controller with cable orientation indicator and programmable current limits per port. Use Value: Supports USB3-compatible orientation detection and dynamic load balancing across ports using I²C-controlled current thresholds. |
Use Scenario: Central gateway connecting legacy CAN/LIN buses to modern USB-C peripherals like wireless dongles and OTA update tools. IC Role / Device Role / Timing Role: High-integrity USB-C interface with pre-thermal warning and fault logging via I²C for system-level diagnostics. Use Value: Provides traceable fault records (overtemp, short-circuit, ESD event) for root-cause analysis in field-reliability reporting. |
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 |
|---|---|---|---|
| MAX20461AATJD/V+ | Omits VCONN LDO and associated circuitry; identical pinout and DC-DC/USB switch functionality. | Not suitable for active cable support; lower cost where VCONN is unused. | Select MAX20461ATJD/V+ when powering electronically marked cables; choose MAX20461AATJD/V+ for passive-cable-only systems. |
| TPS65987D-64 | Single-chip USB-C PD controller with integrated 3A buck; lacks automotive qualification, no 40V load dump rating, and no ISO 10605 ESD certification. | Targeted at consumer/commercial docking stations; not validated for automotive temperature or EMC requirements. | Only consider for non-automotive designs; MAX20461ATJD/V+ remains required for AEC-Q100-compliant deployments. |
Compared with MAX20461AATJD/V+, the MAX20461ATJD/V+ adds certified VCONN capability essential for active cable interoperability; compared with TPS65987D-64, it delivers full automotive qualification, higher ESD robustness, and load dump resilience - critical for production vehicle integration.
Availability
MAX20461ATJD/V+ is available at Aetrix Electronics and suitable for automotive radio head units, telematics control units, and infotainment gateways requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX20461ATJD/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 since 1965.
The MAX20461 is part of Analog Devices' automotive power and interface portfolio, designed specifically to consolidate USB-C host functionality, high-current DC-DC conversion, and robust protection into a single AEC-Q100-qualified IC for infotainment and connectivity systems.
FAQ
What is the maximum cable resistance compensation supported by the MAX20461ATJD/V+?
The MAX20461ATJD/V+ supports automatic USB voltage compensation for captive cable resistances up to 474mΩ, implemented via its SENSP/SENSN differential sense inputs and configurable feedback-adjustment circuit. This ensures stable 5V VBUS delivery at the portable device connector despite IR drop across long in-vehicle cables. The compensation gain is user-programmable via external resistor or I²C register, and is validated per the typical application circuit with 1m cable testing.
Does the MAX20461ATJD/V+ support USB On-The-Go (OTG) functionality?
Yes, the MAX20461ATJD/V+ supports USB On-The-Go through its dual-role capable configuration channel (CC1/CC2) logic and integrated BC1.2 host charger emulator. It detects and responds to UFP attachments, enables DRP-like behavior in supervised systems via I²C control, and complies with the USB OTG specification for host negotiation and session request protocol (SRP). This capability is confirmed in the "USB On-The-Go and Dual-Role Applications" section of the datasheet.
What is the purpose of the HVD+ and HVD– pins on the MAX20461ATJD/V+?
The HVD+ and HVD– pins on the MAX20461ATJD/V+ provide high-voltage clamping for the USB D+ and D– data lines, respectively. They enable ±25kV air-gap ESD protection per ISO 10605 without requiring external TVS diodes. These pins connect directly to the internal protection circuitry and are rated for –0.3V to +18V, ensuring signal integrity is preserved during transient events while meeting automotive EMC requirements.
Can the MAX20461ATJD/V+ operate in forced-PWM mode?
Yes, the MAX20461ATJD/V+ supports forced-PWM operation across its entire load range, eliminating low-frequency beat notes and improving EMI predictability in noise-sensitive automotive audio environments. This mode is enabled via I²C register bit or CONFIG pin strapping, and maintains fixed-frequency switching even at light loads - unlike skip-mode operation which introduces variable frequency content.
How does thermal management work in the MAX20461ATJD/V+?
The MAX20461ATJD/V+ implements three-tier thermal management: (1) Overtemperature protection triggers shutdown at +150°C junction; (2) Pre-warning flag asserts at +115°C via I²C register and FAULT pin; (3) Intelligent current foldback gradually reduces output current above +115°C while sustaining regulation. All functions are verified across –40°C to +125°C ambient and documented in the "Thermal Overload Protection" section.
MAX20461ATJD/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)
MAX20461ATJD/V+ FAQ
1.How can I place an order for MAX20461ATJD/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20461ATJD/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 MAX20461ATJD/V+ reliable?
The price and inventory of MAX20461ATJD/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20461ATJD/V+ is usually 5 days.
3.What payment methods are accepted for MAX20461ATJD/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20461ATJD/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20461ATJD/V+?
MAX20461ATJD/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20461ATJD/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 MAX20461ATJD/V+?
For technical support, including MAX20461ATJD/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20461ATJD/V+ requirements.
6.How does Aetrix verify that MAX20461ATJD/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20461ATJD/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 MAX20461ATJD/V+ meets industry standards.
7.What is the process for return or replacement of MAX20461ATJD/V+?
All MAX20461ATJD/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20461ATJD/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 MAX20461ATJD/V+ part is unused and in its original packaging.
Return procedure for MAX20461ATJD/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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