Analog Devices Inc./Maxim Integrated MAX16993AGJL/VY+T

Overview

MAX16993AGJL/VY+T 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) cascaded from OUT1. It operates from 3.5V–36V input, delivers up to 3A per low-voltage channel, consumes only 30µA quiescent current, and supports 2.1MHz switching for compact EMI-optimized designs in ADAS camera modules and infotainment head units.

For engineers reviewing the MAX16993AGJL/VY+T datasheet, MAX16993AGJL/VY+T pinout, MAX16993AGJL/VY+T application, or MAX16993AGJL/VY+T equivalent, key selection criteria include its AEC-Q100 qualification, -40°C to +125°C operation, individual RESET_ outputs with programmable timeout, spread-spectrum enable (SSEN), and SYNC input for system-level clock synchronization - all critical for robust automotive power sequencing and noise-sensitive environments.

Technical Context

The MAX16993AGJL/VY+T implements a current-mode control architecture with forced-PWM and skip modes, enabling stable regulation across wide load ranges while minimizing light-load power loss. Its OUT1 controller uses an external high-side MOSFET and integrated low-side driver, while OUT2 and OUT3 integrate both high- and low-side FETs - eliminating external switches and reducing board area.

Frequency configuration is pin-selectable via CSEL1 (GND = 2.1MHz; BIAS = factory-divided options: 1.05MHz/525kHz/420kHz/350kHz), and spread-spectrum modulation (enabled via SSEN) varies fSW by ±3% at 4kHz to suppress narrowband EMI peaks. All three channels feature independent enable inputs (EN1/EN2/EN3), open-drain RESET_ outputs with fixed timeout periods (0.1ms–7.8ms), and overtemperature/overcurrent protection.

Key Specifications

Pinout & Package

The MAX16993AGJL/VY+T is housed in a 32-pin TQFN-EP (5mm × 5mm × 0.75mm) with side-wettable QFND-EP variant, featuring exposed pad (EP) connected to GND for thermal dissipation (θ_JA = 29°C/W).

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 TPS653221AQDAPRQ1, the MAX16993AGJL/VY+T offers unique spread-spectrum capability and flexible frequency selection via CSEL1, making it optimal for EMI-constrained layouts where layout reuse isn't mandatory and diagnostic extensions aren't required.

Availability

MAX16993AGJL/VY+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and body control modules requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for MAX16993AGJL/VY+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 precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and automotive applications.

The MAX16993AGJL/VY+T belongs to Maxim's automotive PMIC portfolio, engineered specifically for compact, high-efficiency, multi-rail power delivery in space-constrained, thermally aggressive vehicle subsystems.

FAQ

What is the maximum input voltage the MAX16993AGJL/VY+T can withstand during load-dump events?

The MAX16993AGJL/VY+T is protected against load-dump transients up to 42V on the VSUP pin, exceeding ISO 7637-2 Pulse 5a requirements. This allows direct connection to automotive battery rails without external TVS clamping in most standard 12V systems. The device remains functional during these events and resumes normal operation once voltage returns within specification.

Does the MAX16993AGJL/VY+T support adjustable output voltages for all three channels?

Yes - the MAX16993AGJL/VY+T supports resistor-divider-adjustable outputs on all three channels. OUT1 regulates to 1.0V at FB1 in adjustable mode, enabling 3.0V–5.5V outputs. OUT2 and OUT3 regulate to 0.815V at their respective feedback pins, supporting 0.8V–3.95V outputs. Fixed-voltage options are also available via factory trimming.

How does the spread-spectrum function work on the MAX16993AGJL/VY+T?

The MAX16993AGJL/VY+T's spread-spectrum function is enabled by pulling SSEN high to BIAS. It modulates the internal oscillator frequency by ±3% (±6% total span) with a 4kHz sawtooth profile, reducing peak radiated emissions without affecting regulation accuracy or loop stability. This feature is disabled by default (SSEN = GND) and applies only to internally generated clocks - not external SYNC sources.

Can the MAX16993AGJL/VY+T be synchronized to an external clock source?

Yes - the MAX16993AGJL/VY+T includes a dedicated SYNC input that accepts external clock signals from 1.7MHz to 2.4MHz with 50% duty cycle. When configured as an input (factory setting), asserting SYNC high enables forced-PWM mode and locks internal switching to the external clock, eliminating beat frequencies in multi-PMIC systems.

What thermal performance can be expected from the MAX16993AGJL/VY+T in a typical automotive PCB layout?

In a standard 4-layer JEDEC JESD51-7 test board, the MAX16993AGJL/VY+T achieves θ_JA = 29°C/W (TQFN) and θ_JC = 1.7°C/W. With proper thermal vias under the exposed pad and copper pours on inner layers, junction temperature rise remains below 40°C at full 3A load per channel at +85°C ambient - well within the +150°C max junction limit.