Analog Devices Inc./Maxim Integrated MAX16993AGJE/VY+T

Overview

MAX16993AGJE/VY+T from Maxim Integrated is a 2.1MHz automotive-grade PMIC integrating one high-voltage synchronous step-down controller (OUT1, 3.5–36V input, 30µA quiescent current) and two cascaded low-voltage synchronous step-down converters (OUT2/OUT3, 0.8–3.95V, up to 3A each), all in a single 32-pin TQFN-EP package. It delivers regulated power for ADAS camera modules, infotainment head units, and domain controllers requiring AEC-Q100 compliance and load-dump resilience.

For engineers reviewing the MAX16993AGJE/VY+T datasheet, MAX16993AGJE/VY+T pinout, MAX16993AGJE/VY+T application, or MAX16993AGJE/VY+T equivalent, key selection criteria include its 3-channel architecture with individual enable/reset, spread-spectrum EMI reduction, SYNC input for system-level clock synchronization, and factory-programmable switching frequencies (2.1MHz or OTP-divided options).

Technical Context

The MAX16993AGJE/VY+T implements a current-mode control architecture with forced-PWM and skip modes across all three channels. Its OUT1 controller uses an internal oscillator with pin-selectable 2.1MHz operation or factory-trimmed lower frequencies (1.05MHz, 525kHz, 420kHz, 350kHz), while OUT2/OUT3 operate fixed at 2.1MHz and are powered directly from OUT1's output.

It integrates protection features including overtemperature shutdown (+170°C), short-circuit current limiting (100–150mV CS threshold), individual open-drain RESET_ outputs with programmable timeout (0.1–7.8ms), and undervoltage lockout on PV (2.7V typical). The BIAS LDO transitions from 5V pre-soft-start to OUT1 voltage post-soft-start, powering internal circuitry and gate drivers.

Key Specifications

Pinout & Package

MAX16993AGJE/VY+T is housed in a 32-pin TQFN-EP (5mm × 5mm × 0.75mm) with side-wettable QFND-EP variant, featuring exposed thermal pad (EP = GND) and separate analog (GND) and power ground pins (PGND2, PGND3) for noise isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20096ATPA/VY+ and TPS650332ARSLR, the MAX16993AGJE/VY+T uniquely combines cascaded topology, SSEN-enabled EMI reduction, and factory-programmable frequency options - making it optimal for space-constrained, emission-sensitive automotive modules requiring precise rail sequencing and robust transient immunity.

Availability

MAX16993AGJE/VY+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and domain controllers requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for MAX16993AGJE/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.

The MAX16993 belongs to Maxim's automotive PMIC product line, designed specifically to consolidate multi-rail power delivery in safety-critical vehicle systems while meeting stringent EMI, thermal, and reliability requirements.

FAQ

What is the maximum input voltage rating for MAX16993AGJE/VY+T, and how does it handle automotive transients?

The MAX16993AGJE/VY+T supports a continuous input voltage range of 3.5V to 36V and is protected against load-dump transients up to 42V. This is achieved through internal clamping and robust gate-drive design on the high-side switch, enabling direct connection to the vehicle battery without external TVS diodes in most cases. The device remains operational during ISO 7637-2 Pulse 5a transients, satisfying automotive system-level surge requirements.

Does MAX16993AGJE/VY+T support output voltage adjustment, and what are the fixed options?

Yes, MAX16993AGJE/VY+T supports both fixed and adjustable outputs. For OUT1, fixed options include 3.3V (FB1 = GND), 5.0V, and 3.15V (factory-trimmed); adjustable mode uses a resistor divider to set 3.0–5.5V with 1.0V feedback reference. OUT2/OUT3 offer fixed 3.15V/1.8V or adjustable 0.8–3.95V via external dividers. All fixed options achieve ±3% accuracy over temperature and load without precision resistors.

How does the spread-spectrum feature (SSEN) function in MAX16993AGJE/VY+T, and what is its impact on EMI?

When SSEN is pulled high to BIAS, the MAX16993AGJE/VY+T modulates its internal oscillator frequency between fSW and fSW + 6% with a 4kHz sawtooth profile. This spreads spectral energy across a wider bandwidth, reducing peak radiated emissions by up to 10dB in the 30–1000MHz range. It is particularly effective for passing CISPR-25 Class 5 conducted and radiated emissions tests without adding ferrite beads or shielded inductors.

What are the thermal characteristics and package options for MAX16993AGJE/VY+T?

MAX16993AGJE/VY+T is offered in a 32-pin TQFN-EP (5mm × 5mm × 0.75mm) and side-wettable QFND-EP (5mm × 5mm × 0.8mm), both with exposed thermal pads. Thermal resistance is θJA = 29°C/W (TQFN) and 37°C/W (QFND), with θJC = 1.7°C/W and 2.8°C/W respectively. The device shuts down at +170°C junction temperature with 15°C hysteresis, and operates continuously from -40°C to +125°C ambient.

Can MAX16993AGJE/VY+T synchronize its switching frequency to an external clock, and what are the requirements?

Yes, MAX16993AGJE/VY+T supports external synchronization via the SYNC pin. When configured as an input (factory setting), it accepts a 1.7–2.4MHz square wave with 50% duty cycle to lock all three channels to the external source. This eliminates beat frequencies in multi-PMIC systems and reduces system-level EMI. SYNC must be pulled to BIAS or driven externally; leaving it floating or grounded enables skip mode.