My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX20461ATJA/V+
- Part No.:
- MAX20461ATJA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX20461ATJA/V+.pdf
- Description:
- IC REG BUCK ADJ 3A 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:400
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX20461ATJA/V+ from Analog Devices is an automotive-grade, 3A synchronous step-down converter with integrated USB Type-C DFP controller, VCONN protection, 1GHz USB 2.0 data switches, and high-bandwidth USB load current sensing. It delivers 5V–7V output from 4.5V–28V input (40V load dump tolerant), supports BC1.2 CDP/SDP modes, and enables robust USB host charging in automotive radio, navigation, and telematics systems.
For engineers reviewing the MAX20461ATJA/V+ datasheet, MAX20461ATJA/V+ pinout, MAX20461ATJA/V+ application, or MAX20461ATJA/V+ equivalent, key selection considerations include its 310kHz–2.2MHz programmable switching frequency, ±25kV ISO 10605 ESD rating on CC pins, I²C-configurable USB voltage compensation for up to 474mΩ cable resistance, short-to-battery protection on VBUS/HVD±, and -40°C to +125°C operation.
Technical Context
The MAX20461ATJA/V+ integrates a fully synchronous buck regulator with internal high-side and low-side MOSFETs, external SYNC I/O for frequency parking, and spread-spectrum capability to reduce EMI. Its USB subsystem includes dual 1GHz bandwidth analog switches, CC1/CC2 configuration channel logic with 20V transient tolerance, and VCONN power delivery support exclusive to the MAX20461 variant (not MAX20461A).
It implements intelligent skip-mode operation with attach/detach detection, configurable USB current limiting via internal peak threshold and external sense resistor, and remote voltage feedback adjustment to compensate for captive cable IR drop. Diagnostics are accessible via I²C-including real-time VBUS/USB current measurement, fault event logging, and interrupt-driven ATTACH signaling.
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 Range | 5V to 7V; user-adjustable via external resistive divider or I²C register for precise USB port regulation. |
| Max Output Current | 3A continuous; supported by integrated 3.5A RMS-rated power stage and thermal foldback protection. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via resistor or I²C to optimize efficiency, EMI, and PCB area. |
| USB Data Bandwidth | 1GHz; preserves signal integrity for USB 2.0 High-Speed (480Mbps) operation with minimal crosstalk. |
| ESD Rating (CC Pins) | ±20V transient tolerance; ±25kV air / ±8kV contact per ISO 10605 (330pF, 2kΩ) in typical application circuit. |
| Operating Temperature | -40°C to +125°C; qualified for under-hood and infotainment module placement in automotive environments. |
Pinout & Package
The MAX20461ATJA/V+ is housed in a 32-pin TQFN package (5mm × 5mm × 0.75mm, Package Code T3255+4C) with exposed thermal pad for enhanced heat dissipation in high-power automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBUS | USB power output | Delivers regulated 5V–7V to downstream device; includes short-to-battery protection and current sensing. |
| CC1, CC2 | USB Type-C configuration channel | Detects plug orientation, source/sink role, and cable attachment; tolerant to ±20V transients. |
| VCONN | VCONN power supply | Provides 5V power to electronically marked cables (EMCA); unique to MAX20461 (not present on MAX20461A). |
| HVDP, HVDM | High-voltage USB data protection | Clamps D+/D- lines during ESD events; enables ±15kV IEC 61000-4-2 compliance. |
| SENSP, SENSN | USB load current sense inputs | Differential inputs for precision current monitoring; supports user-programmable current limit threshold. |
| SYNC | Frequency synchronization I/O | Accepts external clock input or outputs synchronized switching frequency for multi-rail noise coordination. |
| INT(ATTACH) | Attachment detection interrupt | Open-drain output asserting on USB device connect/disconnect; supports wake-up and state tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB Type-C DFP controller | Full compliance with USB Type-C specification including VCONN sourcing, CC polarity detection, and attach/detach logic-eliminates need for discrete CC logic ICs. |
| Programmable USB voltage compensation | Adjusts VBUS output in real time to offset IR drop across captive cables up to 474mΩ-ensures stable 5V at portable device connector. |
| Synchronous buck with spread spectrum | Reduces peak EMI by >10dB across 150kHz–108MHz band; enables AM-band–friendly layout without added shielding. |
| I²C + resistor-based configuration | Supports both standalone (CONFIG1–CONFIG3 pins) and supervised (I²C register) operation-enables flexible integration in legacy and next-gen designs. |
| Comprehensive fault diagnostics | Reports overtemperature, overcurrent, VBUS short, CC fault, and USB data line faults via I²C registers and FAULT/INT pins-reduces system-level debug time. |
Applications
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
|---|---|
|
Use Scenario: Integrated USB host port in vehicle head unit providing charging and data connectivity to smartphones and accessories. IC Role / Device Role / Timing Role: Single-chip USB-C host power delivery, data switching, and cable-aware voltage regulation. Use Value: Eliminates discrete DC-DC, USB switch, and BC1.2 emulator ICs-reducing BOM count by ≥4 components and PCB area by >35%. |
Use Scenario: Embedded USB interface in cellular-connected TCU enabling firmware updates and diagnostic tool access. IC Role / Device Role / Timing Role: Robust USB 2.0 host interface with ESD-hardened data paths and load-dump–tolerant power conversion. Use Value: Maintains reliable USB communication during 40V load dump events and meets ISO 10605/IEC 61000-4-2 automotive ESD requirements out-of-box. |
| Connected Rear-Seat Entertainment | Automotive Gateway Module |
|
Use Scenario: Power and data hub for rear-seat tablets, gaming devices, and wireless peripherals in premium vehicles. IC Role / Device Role / Timing Role: High-current (3A) USB-C host with cable orientation indication and Apple CarPlay® compatibility. Use Value: Delivers full 3A charging regardless of cable orientation while supporting USB On-The-Go negotiation-improving end-user experience. |
Use Scenario: Centralized USB interface in domain controller aggregating diagnostics, OTA update, and service port access. IC Role / Device Role / Timing Role: Supervised USB host with I²C-accessible diagnostics, thermal warning, and intelligent current foldback. Use Value: Enables predictive thermal management and fault logging without additional microcontroller resources-reducing software overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C automotive host charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20461AATJA/V+ | Omits VCONN output; identical pinout, USB switch, buck, and protection features. | Not suitable for electronically marked cables requiring VCONN power. | Select MAX20461AATJA/V+ only if VCONN is unnecessary-reduces cost and simplifies layout where EMCA cables are not used. |
| TPS65987DRLR | Single-chip USB-C PD controller + buck; supports USB PD 3.0 up to 100W but lacks integrated 1GHz USB 2.0 switches and automotive-grade ESD ratings. | Requires external USB 2.0 switches and additional protection for automotive deployment. | Choose TPS65987DRLR for USB PD sink/source flexibility; choose MAX20461ATJA/V+ when USB 2.0 signal integrity, VCONN, and AEC-Q100–aligned robustness are mandatory. |
Compared with MAX20461AATJA/V+, the MAX20461ATJA/V+ adds essential VCONN support for full USB-C compliance with EMCA cables, while versus TPS65987DRLR it delivers integrated high-bandwidth USB 2.0 switching and automotive-hardened protection-reducing total solution size and validation effort.
Availability
MAX20461ATJA/V+ is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and connected gateway modules requiring stable component supply, long-term lifecycle support, and AEC-Q100–aligned reliability.
Supply support for MAX20461ATJA/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 MAX20461ATJA/V+ belongs to Analog Devices' automotive power and interface product line, engineered 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 primary function of the MAX20461ATJA/V+ in an automotive USB host system?
The MAX20461ATJA/V+ serves as a complete automotive USB-C host power and data interface IC. It integrates a 3A synchronous buck converter, USB Type-C DFP controller with VCONN support, 1GHz USB 2.0 analog switches, and high-accuracy current sensing. Its core function is to deliver regulated 5V–7V power, detect cable orientation and attachment, protect against ESD and load dump, and maintain signal integrity-all within a single 5mm × 5mm package. This eliminates multiple discrete ICs in automotive head units and TCUs.
Does the MAX20461ATJA/V+ support USB Power Delivery (PD) protocol negotiation?
No, the MAX20461ATJA/V+ does not support USB Power Delivery (PD) protocol negotiation. It implements USB Type-C DFP functionality for legacy BC1.2 charging (CDP/SDP modes) and basic attach/detach detection, but lacks the PD PHY, BMC decoder, and policy engine required for PD 2.0/3.0 communication. For USB PD applications, designers must pair it with a dedicated PD controller or select an alternative like the TPS65987DRLR.
How does the MAX20461ATJA/V+ compensate for voltage drop across long captive cables?
The MAX20461ATJA/V+ uses a configurable feedback-adjustment circuit that monitors USB load current via the SENSP/SENSN differential inputs. Based on measured current and a user-programmed gain setting (via resistor or I²C), it dynamically increases the VBUS output voltage to offset IR drop-supporting compensation for up to 474mΩ cable resistance. This ensures stable 5V delivery at the portable device connector, even with long or high-resistance automotive cables.
What is the difference between MAX20461ATJA/V+ and MAX20461AATJA/V+?
The MAX20461ATJA/V+ includes VCONN power delivery capability for electronically marked cables (EMCA), while the MAX20461AATJA/V+ omits VCONN output. Both share identical pinout, USB 2.0 switch bandwidth, buck converter specs, ESD ratings, and I²C interface. The VCONN pin (Pin 27) is functional only on MAX20461ATJA/V+; on MAX20461AATJA/V+, it is a no-connect. All other electrical and thermal characteristics are identical.
Is the MAX20461ATJA/V+ qualified to AEC-Q100 standards?
Yes, the MAX20461ATJA/V+ is qualified per AEC-Q100 Grade 1 (-40°C to +125°C ambient), with full automotive qualification including HTOL, temperature cycling, and ESD testing per ISO 10605 and IEC 61000-4-2. Its 32-pin TQFN package, thermal performance (θJA = 29°C/W on 4-layer board), and 40V load dump tolerance confirm its suitability for under-hood and infotainment module deployment in production vehicles.
MAX20461ATJA/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)
MAX20461ATJA/V+ FAQ
1.How can I place an order for MAX20461ATJA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20461ATJA/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 MAX20461ATJA/V+ reliable?
The price and inventory of MAX20461ATJA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20461ATJA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20461ATJA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20461ATJA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20461ATJA/V+?
MAX20461ATJA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20461ATJA/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 MAX20461ATJA/V+?
For technical support, including MAX20461ATJA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20461ATJA/V+ requirements.
6.How does Aetrix verify that MAX20461ATJA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20461ATJA/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 MAX20461ATJA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20461ATJA/V+?
All MAX20461ATJA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20461ATJA/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 MAX20461ATJA/V+ part is unused and in its original packaging.
Return procedure for MAX20461ATJA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX20461ATJA/V+ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
