Analog Devices Inc./Maxim Integrated MAX16963SATEC/V+T

Overview

MAX16963SATEC/V+T from Maxim Integrated is a dual synchronous step-down DC-DC converter optimized for automotive postregulation and point-of-load applications. It operates from 2.7V to 5.5V input, delivers up to 1.5A per output at 0.8V–3.6V adjustable output voltage, and features fixed 2.2MHz PWM mode with skip-mode efficiency enhancement. Its thermally enhanced 4mm × 4mm TQFN-EP package supports -40°C to +125°C operation.

For engineers reviewing the MAX16963SATEC/V+T datasheet, MAX16963SATEC/V+T pinout, MAX16963SATEC/V+T application, or MAX16963SATEC/V+T equivalent, key selection criteria include dual-output current capability (1.5A each), spread-spectrum EMI reduction, independent enable inputs, open-drain power-good outputs with 16ms delay, and factory-programmable SYNC I/O functionality.

Technical Context

The MAX16963SATEC/V+T integrates two independent synchronous buck regulators sharing a common PV supply but with separate LX, PGND, PV1/PV2, EN1/EN2, and PG1/PG2 terminals. Each channel employs peak-current-mode control with internal 800mV reference, 2.2MHz oscillator (±10% over temperature), and programmable spread-spectrum modulation (±6% deviation) to reduce radiated emissions.

It supports forced PWM (FPWM) and skip-mode operation via the dedicated PWM pin, includes 8ms fixed soft-start and thermal shutdown at 165°C (15°C hysteresis), and provides overcurrent protection with 2.35A typical current-limit threshold per channel. The device uses low-R_DS(ON) integrated MOSFETs (90mΩ pMOS / 68mΩ nMOS) to maintain high efficiency across load range.

Key Specifications

Pinout & Package

The MAX16963SATEC/V+T is housed in a thermally enhanced 4mm × 4mm, 16-pin TQFN-EP package with exposed pad (EP) soldered to GND plane for optimal heat dissipation. Pin numbering follows standard top-view orientation with EP centered beneath the die.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output step-down converter applications.

Compared with TPS65023BRSBR and LM26420QSQX/NOPB, the MAX16963SATEC/V+T uniquely combines AEC-Q100 Grade-2 qualification, spread-spectrum EMI suppression, programmable SYNC I/O, and 16ms power-good delay - making it the only option qualified for safety-critical automotive postregulation where radiated emissions and timing predictability are constrained.

Availability

MAX16963SATEC/V+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power delivery, and body control module designs requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for MAX16963SATEC/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 precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX16963 product line delivers highly integrated, AEC-Q100-qualified DC-DC converters targeting automotive postregulation and point-of-load applications demanding high efficiency, low EMI, and robust thermal performance.

FAQ

What is the maximum output current capability of the MAX16963SATEC/V+T per channel?

The MAX16963SATEC/V+T delivers up to 1.5A of continuous output current per channel under full thermal derating conditions in its 4mm × 4mm TQFN-EP package. This rating is validated across the full -40°C to +125°C automotive temperature range with appropriate PCB copper area and airflow. The device achieves this using integrated low-R_DS(ON) MOSFETs (90mΩ pMOS / 68mΩ nMOS) and optimized thermal design with the exposed pad connected to a solid GND plane.

Does the MAX16963SATEC/V+T support spread-spectrum frequency modulation?

Yes, the MAX16963SATEC/V+T includes optional spread-spectrum frequency modulation that varies the internal 2.2MHz switching frequency by ±6% to reduce peak radiated electromagnetic emissions. This feature is enabled via factory programming and is confirmed for the SATE suffix variant per the Selector Guide. Spread-spectrum operation applies only to the internal oscillator - externally synchronized clocks retain fixed frequency.

What is the function of the SYNC pin on the MAX16963SATEC/V+T?

The SYNC pin on the MAX16963SATEC/V+T is a factory-programmable I/O configured as either a synchronization input (accepting 1.7–2.5MHz external clock) or a 90° phase-shifted synchronization output. For the SATE variant, SYNC is programmed as an input. This capability allows multiple MAX16963SATEC/V+T devices to be synchronized, eliminating beat frequencies and reducing input capacitor RMS current in multi-rail systems.

How does the MAX16963SATEC/V+T handle power sequencing between its two output channels?

The MAX16963SATEC/V+T supports independent power sequencing via separate EN1 and EN2 enable inputs and dedicated PG1 and PG2 open-drain power-good outputs. Each channel can be enabled/disabled individually, and each PG output asserts after its respective output reaches regulation with a fixed 16ms delay. This allows precise control over startup order and fault isolation - essential for complex automotive subsystems like domain controllers with multiple voltage domains.

What package type and thermal characteristics does the MAX16963SATEC/V+T use?

The MAX16963SATEC/V+T uses a 4mm × 4mm, 16-pin TQFN-EP package with exposed thermal pad (EP). Its junction-to-ambient thermal resistance (θ_JA) is 40°C/W on a standard 4-layer JEDEC board. The exposed pad must be soldered to a large contiguous GND copper plane using multiple vias to achieve rated 1.5A/channel performance at +125°C ambient. Thermal shutdown activates at 165°C junction temperature with 15°C hysteresis.