Analog Devices Inc./Maxim Integrated MAX16993ATJI/V+T

Overview

MAX16993ATJI/V+T from Maxim Integrated is an AEC-Q100 qualified automotive PMIC integrating one high-voltage synchronous step-down controller (OUT1, 3.5–36V input, up to 42V transient tolerant) and two cascaded low-voltage synchronous step-down converters (OUT2/OUT3, 0.8–3.95V, up to 3A each), all operating at 2.1MHz. It delivers 30µA quiescent current in no-load mode and supports spread-spectrum and external synchronization for EMI reduction - deployed in ADAS camera modules, infotainment head units, and body control modules.

For engineers reviewing the MAX16993ATJI/V+T datasheet, MAX16993ATJI/V+T pinout, MAX16993ATJI/V+T application, or MAX16993ATJI/V+T equivalent, key selection criteria include its -40°C to +125°C automotive temperature rating, side-wettable QFND-EP 5mm × 5mm package with exposed pad, individual RESET_ outputs per channel, factory-trimmed or resistor-adjustable output voltages, and dual 180° out-of-phase 2.1MHz converters cascaded from OUT1.

Technical Context

The MAX16993ATJI/V+T implements a current-mode architecture with forced-PWM and skip modes, enabling stable regulation across wide load ranges while minimizing light-load power loss. Its OUT1 controller uses internal high- and low-side gate drivers (R_DH1 ≤ 4Ω, R_DL1 ≤ 5Ω) and supports programmable switching frequencies (2.1MHz default or factory-set 1.05/0.525/0.42/0.35MHz via CSEL1).

OUT2 and OUT3 operate from OUT1's output, sharing 2.1MHz fixed-frequency operation with 180° phase shift to reduce input ripple. Each includes integrated FETs (R_DS(ON) ≤ 110mΩ high-side, ≤ 90mΩ low-side), individual enable inputs (EN2/EN3), open-drain RESET_ outputs with programmable timeout (0.1–7.8ms), and ±3% output voltage accuracy over line, load, and temperature.

Key Specifications

Pinout & Package

MAX16993ATJI/V+T is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad connected to GND. The package supports solder joint inspection and provides low thermal resistance (θ_JC = 2.8°C/W) for automotive-grade power dissipation.

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+ and TPS653221AQPWPRQ1, the MAX16993ATJI/V+T uniquely combines pin-selectable frequency (2.1MHz or factory-divided), spread-spectrum enable (SSEN), and SYNC input for external clock alignment - offering the broadest EMI mitigation toolkit for complex automotive ECUs requiring both flexibility and compliance.

Availability

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

Supply support for MAX16993ATJI/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 - emphasizing reliability, integration, and AEC-Q100 qualification.

The MAX16993ATJI/V+T belongs to Maxim's automotive PMIC portfolio, engineered specifically for compact, high-efficiency power delivery in space-constrained electronic control units where EMI, thermal performance, and startup sequencing are critical.

FAQ

What is the maximum input voltage transient tolerance for MAX16993ATJI/V+T?

The MAX16993ATJI/V+T withstands load-dump transients up to 42V on the VSUP pin, meeting ISO 16750-2 Pulse 5a requirements. This protection is inherent to the high-voltage controller stage (OUT1) and does not require external TVS diodes for standard automotive battery scenarios. The device remains fully operational during 42V/400ms transients, ensuring robustness in jump-start and alternator surge conditions.

Does MAX16993ATJI/V+T support independent power sequencing for its three outputs?

Yes, MAX16993ATJI/V+T supports independent sequencing via separate enable inputs (EN1, EN2, EN3) and individual open-drain RESET_ outputs (RESET1, RESET2, RESET3). EN1 controls the primary controller; EN2/EN3 independently enable the secondary converters only after OUT1 reaches regulation. RESET_ timeout periods (0.1–7.8ms) are factory-programmable, allowing precise coordination with downstream processors and FPGAs during boot.

Can MAX16993ATJI/V+T operate in forced-PWM mode across all load conditions?

Yes, MAX16993ATJI/V+T enters forced-PWM mode when the SYNC pin is driven high (≥1.8V), overriding skip mode operation. In this mode, switching remains fixed at the selected frequency (e.g., 2.1MHz) regardless of load, eliminating audible noise and output voltage ripple variation - essential for powering sensitive analog circuits and high-speed interfaces in automotive applications.

What package type and thermal characteristics does MAX16993ATJI/V+T use?

MAX16993ATJI/V+T uses a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad. Its junction-to-ambient thermal resistance is 37°C/W, and junction-to-case is 2.8°C/W (measured per JEDEC JESD51-7 on 4-layer board). This enables 2160mW continuous power dissipation at +70°C ambient, supporting full 3A output capability in automotive under-hood environments.

How does the spread-spectrum feature of MAX16993ATJI/V+T reduce EMI?

The MAX16993ATJI/V+T spread-spectrum function modulates the internal oscillator frequency by ±6% around the nominal value (e.g., 2.1MHz → 2.1–2.226MHz) with a 4kHz sawtooth profile. This spreads radiated energy across a wider bandwidth, reducing peak emissions by up to 10dBµV in CISPR 25 testing - verified in typical automotive camera module layouts without additional shielding or filtering.