Analog Devices Inc./Maxim Integrated MAX16993ATJA/V+T

Overview

MAX16993ATJA/V+T from Maxim Integrated is an AEC-Q100 qualified automotive PMIC integrating one high-voltage synchronous step-down controller (OUT1) and two cascaded low-voltage synchronous step-down converters (OUT2/OUT3), operating up to 36V input, delivering 3A per low-voltage output, with 30µA quiescent current and 2.1MHz switching frequency - used in ADAS camera modules, infotainment head units, and body control modules.

For engineers reviewing the MAX16993ATJA/V+T datasheet, MAX16993ATJA/V+T pinout, MAX16993ATJA/V+T application, or MAX16993ATJA/V+T equivalent, key selection criteria include its -40°C to +125°C operation, side-wettable QFND-EP package, individual RESET_ outputs with programmable timeout, spread-spectrum enable (SSEN), and SYNC input for system-level clock synchronization.

Technical Context

The MAX16993ATJA/V+T implements a current-mode architecture supporting forced-PWM and skip modes, with independent enable inputs (EN1–EN3) and open-drain RESET_ outputs per channel. Its OUT1 controller features pin-selectable 2.1MHz or factory-programmed lower frequencies (1.05MHz/525kHz/420kHz/350kHz), while OUT2/OUT3 operate fixed at 2.1MHz and are powered directly from OUT1.

It integrates protection including overtemperature shutdown (+170°C), short-circuit current limiting (100–150mV sense threshold), and load-dump transient tolerance up to 42V on VSUP. The BIAS LDO provides 5V internal regulation, transitioning to OUT1 voltage post-soft-start, and supports up to 100mA internal supply.

Key Specifications

Pinout & Package

MAX16993ATJA/V+T is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad connected to GND. Pin functions are validated per Maxim's official datasheet Rev 14 (12/2016).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel automotive DC-DC controller applications.

Compared with MAX20096ATPA/V+, MAX16993ATJA/V+ delivers complete triple-rail integration in one package; versus TPS650361QRGZRQ1, it offers wider output adjustability, spread-spectrum capability, and programmable RESET_ timing - critical for next-gen ADAS and gateway designs requiring EMI compliance and flexible sequencing.

Availability

MAX16993ATJA/V+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16993ATJA/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

Maxim Integrated, now part of Analog Devices, designs high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets.

The MAX16993 belongs to Maxim's automotive-grade power-management portfolio, engineered specifically for compact, high-efficiency, multi-rail power delivery in safety-critical vehicle electronics with stringent EMI and thermal requirements.

FAQ

What is the maximum input voltage rating for MAX16993ATJA/V+T, and how does it handle automotive load-dump events?

The MAX16993ATJA/V+T supports a continuous input voltage range of 3.5V to 36V and is rated to withstand load-dump transients up to 42V on the VSUP pin. This is achieved through internal clamping and robust gate-drive design, eliminating the need for external TVS diodes in most automotive battery-connected applications. The device remains fully functional during ISO 16750-2 Pulse 5a (42V/400ms) events without latch-up or parameter shift.

Does MAX16993ATJA/V+T support adjustable output voltages, and what is the feedback reference voltage for OUT1?

Yes, MAX16993ATJA/V+T supports both factory-trimmed fixed outputs (e.g., 3.3V, 5.0V) and resistor-divider adjustable outputs. In adjustable mode, the FB1 pin regulates to a precise 1.000V (typ, ±1.9mV) reference, enabling output voltages from 3.0V to 5.5V using standard 1% resistors. This reference voltage is guaranteed over -40°C to +125°C and is independent of line/load variations.

How does the spread-spectrum feature (SSEN) affect electromagnetic emissions in MAX16993ATJA/V+T?

When SSEN is pulled high to BIAS, the MAX16993ATJA/V+T modulates its internal oscillator frequency between fSW and fSW + 6% at a 4kHz sawtooth rate. This spreads spectral energy across a wider bandwidth, reducing peak radiated emissions by up to 10dBµV in the 30–1000MHz range - directly aiding compliance with CISPR-25 Class 5 requirements without adding ferrites or shielding.

What thermal protection mechanisms are implemented in MAX16993ATJA/V+T, and at what temperatures do they activate?

MAX16993ATJA/V+T includes thermal warning at +150°C and thermal shutdown at +170°C, with 15°C hysteresis. When temperature exceeds +150°C, the ERR pin asserts low to signal impending thermal stress; above +170°C, all regulators disable and RESET_ outputs go low. Junction temperature is monitored continuously, and the device resumes normal operation only after cooling below +155°C.

Can MAX16993ATJA/V+T be synchronized to an external clock, and what are the valid input frequency and duty-cycle requirements for the SYNC pin?

Yes, MAX16993ATJA/V+T supports external clock synchronization via the SYNC pin. When configured as an input, it accepts frequencies from 1.7MHz to 2.4MHz with a 50% ±5% duty cycle. The internal oscillator locks to the external clock within one cycle, enabling deterministic phase alignment across multiple PMICs in complex automotive ECUs - critical for reducing beat-frequency noise in multi-rail systems.