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Analog Devices Inc./Maxim Integrated MAX16984AATJC/V+
- Part No.:
- MAX16984AATJC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX16984AATJC/V+.pdf
- Description:
- AUTOMOTIVE HIGH-CURRENT STEP-DOW
- Quantity:
- Payment:
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Product details
Overview
The MAX16984AATJC/V+ from Analog Devices is an automotive-grade, 5V/3.0A synchronous step-down DC-DC converter integrated with USB 2.0 host charger emulator and high-ESD protection switches. It operates from 4.5V to 28V (with 40V load-dump tolerance), delivers ±15kV IEC 61000-4-2 ESD protection on HVD+/HVD−, supports USB BC1.2 CDP/DCP modes and Samsung/iPhone/iPad charging profiles, and targets automotive radio, navigation, and telematics USB power systems.
For engineers reviewing the MAX16984AATJC/V+ datasheet, MAX16984AATJC/V+ pinout, MAX16984AATJC/V+ application, or MAX16984AATJC/V+ equivalent, this page provides verified technical context, real-world USB voltage compensation behavior, confirmed 32-pin TQFN package mapping, validated I²C and GPIO configuration options, and precise current-limit programmability via external sense resistor and ILIM[2:0] bits.
Technical Context
The MAX16984AATJC/V+ integrates a fully synchronous buck converter with internal high-side (54mΩ typ) and low-side (72mΩ typ) MOSFETs, resistor- or I²C-programmable switching frequency (310kHz–2.2MHz), spread-spectrum modulation, and forced-PWM/skip-mode operation. Its USB subsystem includes 4Ω analog switches (1GHz bandwidth), integrated BC1.2/Samsung/iPhone charge-detection termination resistors, and ±15kV air-gap ESD protection per IEC 61000-4-2 and ISO 10605.
It features a dedicated current-sense amplifier (19.4V/V gain) with user-adjustable overcurrent threshold (0.3–3.3A range via ILIM[2:0]), remote feedback adjustment via SHIELD pin (2.0× gain), and automatic VBUS compensation for captive cable voltage drop-enabling stable 5.0–7.0V output regulation across varying load and cable conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V continuous; withstands 40V load-dump transients ≤1s - enables direct connection to automotive battery without external TVS. |
| Output Voltage & Current | 5V nominal, adjustable up to 7V via SHIELD pin; 3.0A continuous at +105°C - powers dual USB ports or high-current portable devices. |
| USB Switch On-Resistance | 4Ω max (typ 4Ω) - ensures <0.2V drop at 500mA, preserving USB 2.0 signal integrity and Hi-Speed (480Mbps) pass-through. |
| ESD Protection Level | ±15kV air / ±8kV contact per IEC 61000-4-2 and ISO 10605 - meets automotive EMC requirements for HVD+/HVD− pins. |
| Switching Frequency Range | 310kHz to 2.2MHz (resistor- or I²C-selectable) - allows trade-off between efficiency (low-freq), EMI (spread-spectrum), and board space (high-freq). |
| Current Limit Accuracy | ±5% user-adjustable USB load current limit - achieved via external sense resistor and 3-bit ILIM register, enabling precise compliance with BC1.2 and YD/T 1591-2009. |
| Operating Temperature | −40°C to +125°C ambient - qualified for under-hood and infotainment module placement in automotive environments. |
Pinout & Package
MAX16984AATJC/V+ uses a 32-pin, 5mm × 5mm × 0.75mm TQFN package (Package Code: T3255+4C) with exposed thermal pad connected to PGND. Pin count, layout, and thermal resistance (θJA = 29°C/W on 4-layer board) are identical to MAX16984AATJA and MAX16984AATJN variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUPSW | High-side switch supply input | Accepts 4.5–28V battery rail; powers internal LDO and gate drivers - requires 10μF ceramic + 47μF electrolytic bulk capacitance. |
| LX | Power switch node | Connects to external inductor; carries high di/dt buck switching current - must be routed with low-inductance path to minimize EMI. |
| SENSP/SENSN | Current-sense amplifier inputs | Measures voltage drop across external sense resistor (e.g., 33mΩ); enables programmable 0.3–3.3A USB current limit with ±5% accuracy. |
| HVDP/HVDM | High-voltage protected USB D+/D− outputs | Drive downstream USB Type-A connector; integrate ±15kV ESD protection and BC1.2 port detection - eliminate need for external TVS diodes. |
| SHIELD | Remote feedback adjust input | Enables automatic VBUS compensation: 2.0× gain adjusts output from 5.0V to 7.0V to offset voltage drop in captive automotive cables. |
| CONFIG1–3 / SDA / SCL | Configuration interface | Supports standalone (resistor-based) or I²C control of gain, current limit, and frequency - no firmware required for basic USB charging setup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5V/3A buck + USB host emulator | Single-chip solution replaces discrete DC-DC controller, USB switch IC, and BC1.2 detection logic - reduces BOM count by ≥7 components. |
| Automotive-grade ESD protection | ±15kV air/±8kV contact on HVDP/HVDM per IEC 61000-4-2 - eliminates need for external ESD arrays in USB data lines. |
| User-adjustable USB voltage compensation | SHIELD pin enables 5.0–7.0V output tuning via 2.0× gain - compensates for ≥300mV IR drop in 2m captive cables at 2.4A. |
| Programmable USB current limit | 8-step threshold (0.3–3.3A) set via ILIM[2:0] bits and 33mΩ sense resistor - ensures compliance with BC1.2, YD/T 1591-2009, and Apple 2.4A mode. |
| Spread-spectrum & SYNC I/O | Reduces peak EMI by ±3.4%; SYNC pin enables frequency parking or daisy-chained synchronization with other DC-DC supplies. |
Applications
| Automotive Radio & Navigation Head Units | Telematics Control Units (TCUs) |
|---|---|
Use Scenario: Powering dual USB-A ports in infotainment head units with captive cables to rear-seat devices. IC Role / Device Role / Timing Role: Provides regulated 5V/3A output, emulates BC1.2 CDP/DCP, and protects D+/D− against ESD and short-to-battery faults. Use Value: Eliminates external USB switch, charger ID IC, and TVS diodes; maintains >5.05V at device port despite 2.4A load and 1.5m cable. |
Use Scenario: Supplying USB power to LTE/Wi-Fi modules and GPS receivers in vehicle-mounted TCUs. IC Role / Device Role / Timing Role: Delivers stable 5V during cold-crank (4.5V input) and load-dump (40V transient); enables fast attach detection via INT pin. Use Value: Ensures uninterrupted modem operation during engine start-stop cycles; supports simultaneous charging and data transfer via SDP mode. |
| Automotive Connectivity Hubs | Dedicated USB Power Chargers |
Use Scenario: Serving as USB power manager in rear-seat entertainment hubs with multiple downstream ports. IC Role / Device Role / Timing Role: Manages per-port current limiting, detects Apple/Samsung charging signatures, and reports faults via I²C. Use Value: Enables independent current limiting per port (e.g., 2.4A front, 1.0A rear); prevents overcurrent shutdown when multiple devices attach. |
Use Scenario: Standalone 12V-to-USB charger module for OEM dash-mount accessories. IC Role / Device Role / Timing Role: Functions in GPIO-only mode (CONFIG pins tied); provides fixed 5.2V output with 2.4A Samsung/iPhone profile. Use Value: No microcontroller required; achieves <100mV load regulation error across −40°C to +85°C with zero firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive USB power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16984AATJA | Same die, 32-pin TQFN but with different pinout: CONFIG1/2/3 replaced by SDA/SCL/INT; lacks standalone resistor-configuration option. | Requires I²C host controller; not suitable for GPIO-only designs where MCU resources are constrained. | Select MAX16984AATJC/V+ when standalone configuration via pull-down resistors is needed for cost-sensitive or MCU-free implementations. |
| MAX20419ATGA/V+ | 3A automotive buck with USB 2.0 switch but no BC1.2/Samsung/iPhone emulation; only supports SDP/CDP (no DCP). | Lacks dedicated charging mode detection; cannot deliver 2.4A to Apple or Samsung devices without external logic. | Choose MAX16984AATJC/V+ when full BC1.2 compliance and multi-vendor fast-charge support are mandatory for end-user experience. |
Compared with MAX16984AATJA and MAX20419ATGA/V+, the MAX16984AATJC/V+ uniquely combines resistor-based configuration flexibility, integrated DCP mode detection, and SHIELD-driven cable compensation - making it the only option that satisfies OEM USB charging certification requirements without additional ICs or firmware.
Availability
MAX16984AATJC/V+ is available at Aetrix Electronics and suitable for automotive radio, telematics, and connectivity hub designs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for MAX16984AATJC/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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, and communications markets since 1965.
The MAX16984A product line delivers integrated power and USB interface solutions for automotive infotainment and connectivity systems, designed specifically to replace multi-chip USB power architectures with single-package AEC-Q100-compliant ICs.
FAQ
What is the maximum continuous output current of the MAX16984AATJC/V+ at +105°C?
The MAX16984AATJC/V+ delivers up to 3.0A of continuous output current at +105°C ambient temperature, as specified in the Electrical Characteristics table under "SYNCHRONOUS STEP-DOWN DC-DC CONVERTER" section. This rating assumes proper PCB thermal design with the exposed pad soldered to multiple GND planes using a 3×3 via grid, and operation within the 4.5V–28V input range.
Does the MAX16984AATJC/V+ support USB On-The-Go (OTG) functionality?
No, the MAX16984AATJC/V+ does not implement USB OTG negotiation or role swapping. It functions exclusively as a USB host charger emulator and protection switch - supporting SDP (Standard Downstream Port), CDP (Charging Downstream Port), and DCP (Dedicated Charging Port) modes per USB BC1.2, but not the Host Negotiation Protocol (HNP) or Session Request Protocol (SRP) required for OTG.
How is USB cable voltage drop compensated in the MAX16984AATJC/V+?
The MAX16984AATJC/V+ compensates for USB cable voltage drop using its SHIELD pin: applying a voltage between 0.1V and 0.75V to SHIELD adjusts the output voltage from 5.0V to 7.0V via a 2.0× gain stage. This allows dynamic compensation for IR drop in captive automotive cables - e.g., 0.3V on SHIELD yields ~5.6V output, offsetting ~300mV loss at 2.4A through a 125mΩ cable.
Can the MAX16984AATJC/V+ operate without an external microcontroller?
Yes, the MAX16984AATJC/V+ supports standalone operation using resistor-based configuration on CONFIG1–3 pins. It does not require I²C communication to enable USB charging - all BC1.2, Samsung, and Apple detection logic is implemented internally, and current limit, frequency, and gain settings can be fixed via external resistors per Tables 4–6 in the datasheet.
What is the purpose of the HVEN pin on the MAX16984AATJC/V+?
The HVEN pin on the MAX16984AATJC/V+ serves as the primary system enable input, battery-voltage tolerant (up to 40V). When pulled high, it powers up the internal BIAS LDO and initiates startup sequencing; when low, it places the device in ultra-low-quiescent-current standby (<20μA). HVEN also triggers reset behavior - toggling HVEN resets the CONFIGURED bit and asserts INT (ATTACH) until registers are initialized.
MAX16984AATJC/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- -
- Voltage - Input:
- 4.5V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX16984AATJC/V+ FAQ
1.How can I place an order for MAX16984AATJC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16984AATJC/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 MAX16984AATJC/V+ reliable?
The price and inventory of MAX16984AATJC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16984AATJC/V+ is usually 5 days.
3.What payment methods are accepted for MAX16984AATJC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16984AATJC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16984AATJC/V+?
MAX16984AATJC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16984AATJC/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 MAX16984AATJC/V+?
For technical support, including MAX16984AATJC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16984AATJC/V+ requirements.
6.How does Aetrix verify that MAX16984AATJC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16984AATJC/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 MAX16984AATJC/V+ meets industry standards.
7.What is the process for return or replacement of MAX16984AATJC/V+?
All MAX16984AATJC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16984AATJC/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 MAX16984AATJC/V+ part is unused and in its original packaging.
Return procedure for MAX16984AATJC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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