Analog Devices Inc./Maxim Integrated MAX16984RATI/V+

Overview

The MAX16984RATI/V+ from Analog Devices is an automotive-grade integrated power management IC combining a 5V/2.1A synchronous step-down DC-DC converter, USB 2.0 data switches with ±15kV IEC 61000-4-2 ESD protection, and host-charger emulation circuitry compliant with USB BC1.2 and YD/T 1591-2009 standards. It delivers regulated 5V output across 4.5V–28V input (42V load dump tolerant), supports iPod/iPhone 1.0A and iPad 2.1A charging modes, and operates from –40°C to +125°C in automotive radio and telematics systems.

For engineers reviewing the MAX16984RATI/V+ datasheet, MAX16984RATI/V+ pinout, MAX16984RATI/V+ application, or MAX16984RATI/V+ equivalent, key selection criteria include its integrated USB BC1.2 detection logic, resistor-programmable 220kHz–2.2MHz switching frequency, ±3% adjustable USB current limit, 4Ω D+/D− analog switch R_ON, and fault-indication open-drain output for system-level safety monitoring.

Technical Context

The device implements a high-efficiency synchronous buck topology with internal high-side n-channel MOSFET (200–450mΩ R_ON) and low-side n-channel switch, supporting forced-PWM or skip-mode operation via SYNC pin control. Its USB protection architecture includes HVD+/HVD− pins rated to ±18V with ±25kV ISO 10605 air-gap ESD protection and overvoltage blanking timeout of 18–30ms.

USB host emulation uses CD0/CD1 configuration bits and integrated termination resistors to detect DCP, CDP, and proprietary Apple charging modes. The SENSP/SENSN current-sense interface enables cable-drop compensation via FBPER/FBMAX-adjustable feedback gain (0.535–1.069 V/V), while the SENSO amplifier provides programmable 1.20V threshold for precise USB load-current limiting.

Key Specifications

Pinout & Package

MAX16984RATI/V+ is housed in a 28-pin, 5mm × 5mm TQFN-CU package with side-wettable flanks for automated optical inspection (AOI). The exposed pad (EP) must be soldered to a large contiguous copper ground plane for thermal management (θ_JA = 29°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive USB power management applications.

Compared with MAX16984RACIL, the MAX16984RATI/V+ offers superior thermal performance (29°C/W vs. 35°C/W) and AOI-compatible side-wettable leads for production traceability; versus MAX16984SACIL, it lacks spread-spectrum but provides identical power delivery and USB functionality at lower cost.

Availability

MAX16984RATI/V+ is available at Aetrix Electronics and suitable for automotive radio and navigation systems, telematics control units, and dedicated USB power chargers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16984RATI/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, headquartered in Wilmington, MA.

The MAX16984 belongs to Analog Devices' automotive power management portfolio, designed specifically for high-reliability USB host power delivery in infotainment, connectivity, and telematics modules operating under severe automotive electrical conditions.

FAQ

What is the maximum continuous output current capability of the MAX16984RATI/V+ at 105°C?

The MAX16984RATI/V+ delivers up to 2.1A of continuous output current at 105°C ambient temperature. This rating is validated under worst-case conditions including 14V input, 5.05V output, and proper PCB thermal design with the exposed pad connected to a large ground plane. Derating applies above 105°C per the thermal characteristics table.

Does the MAX16984RATI/V+ support Apple-specific charging protocols like iPad 2.1A mode?

Yes, the MAX16984RATI/V+ integrates dedicated circuitry for iPad 2.1A and iPhone 1.0A charging modes per Apple's proprietary specifications. It uses internal DM1/DM2 comparators with precise thresholds (e.g., 29–31% of VBIAS for iPad mode) and debounced detection timing (600–1800µs DP response) to reliably identify and configure the correct charge profile without host processor intervention.

How is USB cable voltage drop compensated in the MAX16984RATI/V+?

The MAX16984RATI/V+ compensates for USB cable voltage drop using its SENSP feedback node and analog adjustment inputs FBPER and FBMAX. By configuring FBPER (0V or 3.3V) and FBMAX (0–1.2V), the device adjusts the effective feedback gain from 0.535V/V to 1.069V/V, raising the output voltage up to 6.15V to maintain ≥5.0V at the peripheral port across 330mΩ cable resistance at full 2.1A load.

What protection features does the MAX16984RATI/V+ provide on its HVD+ and HVD− pins?

The MAX16984RATI/V+ provides comprehensive protection on HVD+ and HVD− pins: ±25kV air / ±8kV contact ESD per ISO 10605, ±15kV air / ±8kV contact per IEC 61000-4-2, and ±15kV air / ±8kV contact per 330Ω/330pF model. It also includes overvoltage detection (3.7–4.15V trip), 5µs response time, and 18–30ms blanking timeout before asserting FAULT, ensuring robustness against hot-plug transients and data-line faults.

Can the MAX16984RATI/V+ operate in forced-PWM mode, and how is it enabled?

Yes, the MAX16984RATI/V+ supports forced-PWM mode to eliminate audible noise and ensure constant switching frequency under light loads. It is enabled by driving the SYNC pin to a logic-high level (≥1.4V) using either the IN supply rail or an external clock source. When SYNC is grounded or left floating, the device defaults to skip mode for lowest quiescent current operation.