Analog Devices Inc./Maxim Integrated MAX16993ATJE+T

Overview

MAX16993ATJE+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 switching frequency with 30µA quiescent current - enabling compact, efficient power rails for ADAS camera modules and infotainment head units.

For engineers reviewing the MAX16993ATJE+T datasheet, MAX16993ATJE+T pinout, MAX16993ATJE+T application, or MAX16993ATJE+T equivalent, key selection criteria include its 32-pin side-wettable QFND-EP package, individual enable/reset per channel, spread-spectrum and SYNC-capable clock architecture, and factory-trimmed or resistor-adjustable output voltage options across all three rails.

Technical Context

The MAX16993ATJE+T implements a current-mode control architecture with forced-PWM and skip-mode operation, supporting precise regulation via internal error amplifiers (g_MEA = 300–1200 µS) and programmable soft-start (4ms for OUT1, 2.5ms for OUT2/OUT3). Its OUT1 controller uses external high-side/low-side MOSFETs, while OUT2/OUT3 integrate power FETs with R_DS(ON) as low as 50 mΩ (low-side) and 70 mΩ (high-side).

It features independent protection per rail: overcurrent limiting (100–150mV CS1 threshold), thermal shutdown at +170°C with 15°C hysteresis, and individual open-drain RESET_ outputs asserting on 6% undervoltage with programmable timeout (0.1–7.8ms). The BIAS LDO (5.0V ±0.4V) powers internal circuitry and transitions to OUT1 post-soft-start.

Key Specifications

Pinout & Package

MAX16993ATJE+T is housed in a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad (EP = GND). The package supports AOI and delivers θ_JA = 37°C/W and θ_JC = 2.8°C/W for robust thermal management in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20096ATPA/VY+ and TPS65321A-Q1, the MAX16993ATJE+T uniquely integrates cascaded 3A synchronous buck converters with spread-spectrum, SYNC, and side-wettable packaging - offering superior integration, EMI control, and AOI compatibility for space-constrained automotive modules.

Availability

MAX16993ATJE+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for MAX16993ATJE+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, mixed-signal, and power-management ICs for automotive, industrial, and communications markets, with deep expertise in ruggedized, high-reliability solutions.

The MAX16993ATJE+T belongs to Maxim's automotive-grade PMIC product line, engineered specifically for compact, high-efficiency, multi-rail power delivery in safety-critical vehicle subsystems such as vision processing and domain controllers.

FAQ

What is the maximum input voltage the MAX16993ATJE+T can withstand during automotive load-dump events?

The MAX16993ATJE+T is rated to withstand load-dump transients up to 42V for ≤50ns without damage or functional interruption. This specification complies with ISO 7637-2 Pulse 5a requirements and allows direct connection to the vehicle battery without external TVS clamping in most implementations. The VSUP pin absolute maximum rating is +45V, but sustained operation above 36V is not supported.

Does the MAX16993ATJE+T support independent power sequencing between its three output rails?

Yes, the MAX16993ATJE+T supports fully independent sequencing via dedicated enable inputs: EN1 controls OUT1, EN2 controls OUT2, and EN3 controls OUT3. OUT1 must be enabled first to power PV2/PV3; once OUT1 reaches regulation, EN2 and EN3 can be asserted independently. Each rail also has its own open-drain RESET_ output with programmable timeout (0.1–7.8ms), enabling precise system-level boot and fault-handling sequences.

Can the MAX16993ATJE+T operate in forced-PWM mode across all load conditions?

Yes, the MAX16993ATJE+T supports forced-PWM mode via the SYNC input: applying a logic-high signal (≥1.8V) to SYNC disables skip mode and locks all three regulators into continuous conduction. When synchronized to an external clock (1.7–2.4MHz), forced-PWM operation is maintained regardless of load, eliminating low-frequency ripple and ensuring predictable EMI behavior - critical for noise-sensitive applications like camera ISPs.

What package type does the MAX16993ATJE+T use, and why is side-wettability important?

The MAX16993ATJE+T uses a 32-pin side-wettable QFND-EP package (5mm × 5mm × 0.8mm) with gull-wing leads. Side-wettability enables automated optical inspection (AOI) of solder fillets on the package perimeter - a critical requirement for automotive manufacturing process validation. It also provides superior thermal performance (θ_JA = 37°C/W) compared to standard QFN, supporting reliable operation at +125°C ambient.

How does the MAX16993ATJE+T handle overtemperature conditions?

The MAX16993ATJE+T incorporates dual thermal protection: a thermal-warning flag activates at +150°C (reported via ERR pin), and full thermal shutdown occurs at +170°C with 15°C hysteresis. Upon shutdown, all outputs disable and RESET_ pins assert low. Recovery requires VSUP cycling or temperature falling below +155°C. This staged response supports ASIL-B diagnostic coverage and prevents irreversible silicon damage during sustained overload.