Analog Devices Inc./Maxim Integrated MAX16984SATI/V+T

Overview

The MAX16984SATI/V+T 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 on HVD+/HVD-, and host-charger emulation circuitry compliant with USB BC1.2 and YD/T 1591-2009 standards. It delivers regulated 5V output from 4.5V–28V input (42V load dump tolerant) and enables direct battery-to-USB-port power in automotive infotainment systems.

For engineers reviewing the MAX16984SATI/V+T datasheet, MAX16984SATI/V+T pinout, MAX16984SATI/V+T application, or MAX16984SATI/V+T equivalent, key selection considerations include its dual-role USB voltage compensation (5.0V–6.15V adjustable), integrated iPod/iPad charge-detection termination, 4Ω D+/D− switch R_ON, spread-spectrum EMI reduction, and -40°C to +125°C operating range for under-hood deployment.

Technical Context

The device integrates three functional blocks: a high-efficiency buck converter with internal high-side n-channel MOSFET (R_ONH = 200–450mΩ), low-side n-channel switch (R_ONL = 1–2Ω), and Schottky rectification; dual 4Ω analog USB switches supporting 480Mbps data rates with <200ps propagation delay skew; and a current-sense amplifier with transconductance of 2.5mA/V driving FBMAX/SENSO for programmable USB current limiting and cable-drop compensation.

Its USB detection logic implements dedicated iPhone (1.0A) and iPad (2.1A) charging modes via HVD+/HVD- pulldown resistors (RPD = 300–750kΩ) and comparator thresholds referenced to V_BIAS, while fault handling includes active-low open-drain FAULT output with blanking timeouts (e.g., 3–20ms for SENSN overvoltage) and thermal shutdown at +174°C with 30°C hysteresis.

Key Specifications

Pinout & Package

MAX16984SATI/V+T is packaged in a 28-pin, 5mm × 5mm TQFN-CU with side-wettable flanks for automated optical inspection (AOI) and enhanced thermal performance (θ_JA = 29°C/W). The exposed pad (EP) must be connected to a large-area ground plane for effective heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20419ATG/V+T and TPS65987D-SR, the MAX16984SATI/V+T uniquely combines automotive-grade 42V load dump tolerance, integrated Apple/iPad charging detection, ±15kV HVD± ESD protection, and adjustable USB output voltage in a single 5mm × 5mm package-making it the only drop-in solution for legacy USB-A host charging in harsh automotive environments.

Availability

MAX16984SATI/V+T is available at Aetrix Electronics and suitable for automotive radio and navigation systems, USB host charging ports, telematics control units, and dedicated USB power chargers requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX16984SATI/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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and consumer markets.

The MAX16984SATI/V+T belongs to Analog Devices' automotive power management product line, engineered specifically for robust, integrated USB power delivery in infotainment and connectivity systems operating under severe electrical and thermal conditions.

FAQ

What is the maximum continuous output current of the MAX16984SATI/V+T at 105°C?

The MAX16984SATI/V+T delivers up to 2.1A of continuous output current at an ambient temperature of 105°C. This rating is validated under worst-case conditions including 14V input, forced-PWM mode, and proper thermal layout with the exposed pad soldered to a large copper ground plane. Derating applies above 105°C per the device's thermal characteristics.

Does the MAX16984SATI/V+T support USB On-The-Go (OTG) functionality?

Yes, the MAX16984SATI/V+T is explicitly stated in its datasheet as compatible with the USB On-The-Go specification. Its integrated USB 2.0 analog switches (D+/D−), host-charger detection logic, and bidirectional data path support OTG negotiation when used with appropriate system-level controllers and firmware.

How does the MAX16984SATI/V+T implement cable voltage drop compensation?

The MAX16984SATI/V+T implements cable voltage drop compensation by allowing user-adjustable scaling of the output voltage from 5.0V to 6.15V. This is achieved through the FBPER digital input and FBMAX analog feedback node, which together control the SENS P amplifier gain (ASENSP = 0.535–1.069 V/V) to offset IR losses in long or high-resistance USB cables.

What is the purpose of the HVD+ and HVD- pins on the MAX16984SATI/V+T?

The HVD+ and HVD- pins on the MAX16984SATI/V+T serve as high-voltage-protected USB differential data outputs. They connect directly to the USB connector's D+ and D- pins and integrate ±15kV IEC 61000-4-2 ESD protection, short-to-battery resilience, and Apple-specific charge-detection termination resistors-eliminating the need for external protection components.

Can the MAX16984SATI/V+T operate in forced-PWM mode, and how is it enabled?

Yes, the MAX16984SATI/V+T supports forced-PWM (FPWM) mode to eliminate audible noise and ensure constant switching frequency under light loads. FPWM mode is enabled by driving the SYNC pin high (≥1.4V), either from an external clock source or from the IN supply rail. When SYNC is grounded or left floating, the device defaults to skip mode for improved light-load efficiency.