Analog Devices Inc./Maxim Integrated MAX16993ATJI/V+

Overview

MAX16993ATJI/V+ from Maxim Integrated is a 3-channel automotive-grade PMIC integrating one high-voltage synchronous step-down controller (OUT1) and two low-voltage synchronous step-down converters (OUT2/OUT3), all operating up to 2.1MHz. It accepts 3.5V–36V input, delivers ≤5.0V/≤3.95V outputs with ±2.5% voltage accuracy, and consumes only 30µA quiescent current in no-load DC-DC enabled mode-enabling always-on power domains in ADAS camera modules, infotainment head units, and telematics control units.

For engineers reviewing the MAX16993ATJI/V+ datasheet, MAX16993ATJI/V+ pinout, MAX16993ATJI/V+ application, or MAX16993ATJI/V+ equivalent, key selection criteria include its AEC-Q100 qualification, side-wettable 32-pin QFND-EP package, individual RESET_ outputs per channel, spread-spectrum enable (SSEN), and SYNC input for system-level clock synchronization-critical for EMI-sensitive automotive ECUs.

Technical Context

The MAX16993ATJI/V+ implements a current-mode architecture with forced-PWM and skip modes across all three channels. OUT1 uses an external high-side MOSFET and internal low-side FET, while OUT2/OUT3 integrate both high- and low-side FETs with 50–110mΩ R_DS(ON). Its oscillator supports pin-selectable 2.1MHz operation or factory-trimmed lower frequencies (1.05MHz/525kHz/420kHz/350kHz), and spread-spectrum modulation reduces peak EMI by up to 10dB.

Each channel features independent enable inputs (EN1/EN2/EN3), open-drain RESET_ outputs with programmable timeout (0.1ms–7.8ms), and overtemperature shutdown at +170°C. The BIAS LDO provides 5V internal supply during startup, then transitions to OUT1 voltage post-soft-start-ensuring stable biasing across wide input transients including 42V load-dump events.

Key Specifications

Pinout & Package

MAX16993ATJI/V+ is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad connected to GND. This package supports AOI-compatible reflow and provides θ_JA = 37°C/W for robust thermal performance in high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel automotive PMIC applications.

Compared with MAX20090ATPA/V+ and TPS65321C-Q1, the MAX16993ATJI/V+ offers optimal integration density for cost-sensitive ADAS and infotainment systems where cascaded efficiency, minimal external components, and proven EMI performance are prioritized over safety diagnostics or ultra-high current capability.

Availability

MAX16993ATJI/V+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16993ATJI/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

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets-with emphasis on high-reliability, low-power, and EMI-robust solutions.

The MAX16993ATJI/V+ belongs to Maxim's automotive PMIC family, engineered specifically for single-chip power delivery in space-constrained, thermally demanding ECU environments-targeting camera modules, radar sensors, and infotainment systems requiring AEC-Q100 compliance and fast transient response.

FAQ

What is the maximum input voltage rating for MAX16993ATJI/V+ and how does it handle automotive transients?

The MAX16993ATJI/V+ supports continuous input voltage up to 36V and is protected against load-dump transients up to 42V for ≤50ns. Its VSUP pin withstands these events without external clamping, meeting ISO 7637-2 Pulse 5a requirements. This ruggedness ensures reliable operation during jump-starts or alternator load dumps in automotive applications-critical for maintaining uptime in MAX16993ATJI/V+-based power supplies.

Does MAX16993ATJI/V+ support output voltage adjustment, and what are the available options?

Yes, MAX16993ATJI/V+ supports both fixed and adjustable output voltages. OUT1 offers factory-trimmed fixed options (e.g., 3.3V, 5.0V) or resistor-divider adjustable range from 3.0V to 5.5V (FB1 regulates to 1.0V). OUT2/OUT3 provide fixed outputs (e.g., 3.15V, 1.8V) or adjustable range from 0.8V to 3.95V. All configurations maintain ±3% accuracy across temperature and load-enabling flexible rail generation in MAX16993ATJI/V+ designs without external DACs.

How does the spread-spectrum feature (SSEN) function in MAX16993ATJI/V+, and when should it be enabled?

When SSEN is pulled high to BIAS, MAX16993ATJI/V+ modulates its internal oscillator frequency ±6% at 4kHz, spreading spectral energy to reduce peak radiated emissions. This feature is activated dynamically during EMI testing or in noise-sensitive zones (e.g., near FM antennas). It does not affect externally synchronized operation via SYNC. Enabling SSEN on MAX16993ATJI/V+ typically lowers measured EMI by 6–10dB without altering PCB layout or component selection.

What thermal management provisions does MAX16993ATJI/V+ include, and how is junction temperature monitored?

MAX16993ATJI/V+ integrates thermal warning at +150°C and shutdown at +170°C with 15°C hysteresis. The ERR pin asserts low during thermal events, providing a system-level fault signal. Its side-wettable QFND-EP package delivers θ_JA = 37°C/W on a 4-layer board, and the exposed pad must be soldered to a thermal plane. These features ensure safe operation in under-hood environments where MAX16993ATJI/V+ may operate continuously at +105°C ambient.

Can MAX16993ATJI/V+ be synchronized to an external clock, and what are the electrical requirements for the SYNC input?

Yes, MAX16993ATJI/V+ supports external synchronization via the SYNC pin, configurable as input accepting 1.7MHz–2.4MHz clocks with 50% duty cycle. When driven high (≥1.8V), it forces fixed-frequency PWM mode; when low (≤0.8V), it enables skip mode. The SYNC input has 100kΩ internal pulldown and draws ≤80µA-allowing direct connection to FPGA or MCU clock outputs without level-shifting in MAX16993ATJI/V+ system designs.