Analog Devices Inc./Maxim Integrated MAX16936SATEA/V+T

Overview

MAX16936SATEA/V+T from Maxim Integrated is a 2.5A current-mode step-down DC-DC converter with integrated high-side and low-side MOSFETs, designed for automotive power supplies requiring 3.5V–36V input, 5V fixed output (±2% accuracy), 28µA no-load quiescent current, and resistor-programmable 220kHz–2.2MHz switching frequency. It supports forced-PWM and skip modes and features AEC-Q100 qualification for under-hood navigation systems.

For engineers reviewing the MAX16936SATEA/V+T datasheet, MAX16936SATEA/V+T pinout, MAX16936SATEA/V+T application, or MAX16936SATEA/V+T equivalent, key selection criteria include its 98% max duty cycle during cold-crank transients, 180° out-of-phase SYNCOUT for cascaded rails, spread-spectrum EMI reduction, 42V load-dump protection, and thermal shutdown with automatic recovery.

Technical Context

The MAX16936SATEA/V+T implements current-mode control with cycle-by-cycle overcurrent protection and automatic LX slew-rate adjustment-4ns rise time at >1.1MHz, 8ns below-to optimize EMI/efficiency trade-offs. Its dual supply inputs (SUP/SUPSW) enable robust operation across automotive battery transients including cold crank (down to 3.5V) and load dump (up to 42V).

It integrates a 5V BIAS linear regulator (4.7–5.4V output, 10mA capable) that powers internal circuitry until OUT reaches regulation, then transitions to OUT-supplied biasing above 100mA load. The FSYNC pin selects between skip mode (FSYNC = AGND) and forced-PWM (FSYNC = BIAS or external clock), with synchronization acquisition within one cycle and ±20% external clock tolerance.

Key Specifications

Pinout & Package

MAX16936SATEA/V+T is housed in a 16-pin TSSOP-EP package with exposed thermal pad (EP), optimized for automotive PCB layouts requiring high thermal reliability and compact footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16938SAEE/V+T and LM61480QRTWRQ1, MAX16936SATEA/V+T delivers optimal balance of ultra-low quiescent current, integrated phase-shifted SYNCOUT, and AEC-Q100-compliant transient robustness for mid-power automotive 5V rails-making it the preferred choice where EMI, sequencing, and cold-crank performance are critical.

Availability

MAX16936SATEA/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial HMI systems requiring stable component supply, AEC-Q100 qualification, and long-lifecycle support.

Supply support for MAX16936SATEA/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.

The MAX16936/MAX16938 product line was engineered specifically for automotive power conversion-delivering high-efficiency, low-quiescent-current, transient-hardened buck regulation with integrated diagnostics and sequencing support for next-generation vehicle electronics.

FAQ

What is the maximum input voltage the MAX16936SATEA/V+T can withstand during load-dump events?

The MAX16936SATEA/V+T supports 42V absolute maximum input voltage during load-dump transients per ISO 7637-2 Pulse 5a, enabling direct connection to automotive battery rails without external TVS clamping. This rating applies to both SUP and SUPSW pins, and the device remains functional throughout the event without latch-up or damage when operated within its specified junction temperature limits.

Does the MAX16936SATEA/V+T require an external Schottky diode, and why?

Yes, the MAX16936SATEA/V+T requires an external Schottky diode connected between LX and PGND. Although it integrates high-side and low-side MOSFETs, the diode improves light-load efficiency by providing a low-loss freewheeling path during discontinuous conduction mode-especially critical in automotive standby conditions where quiescent current must remain below 30µA.

How does the FSYNC pin configure skip mode versus forced-PWM operation on the MAX16936SATEA/V+T?

On the MAX16936SATEA/V+T, connecting FSYNC to AGND enables skip mode for lowest quiescent current, while connecting FSYNC to BIAS or an external clock (1.8–2.6MHz) enables fixed-frequency forced-PWM mode. The device synchronizes to the external clock within one cycle and reverts to internal oscillation if the clock is absent for more than two cycles-ensuring seamless transition between modes.

What is the purpose of the SYNCOUT pin on the MAX16936SATEA/V+T, and how is it used?

The SYNCOUT pin on the MAX16936SATEA/V+T provides an open-drain 180° out-of-phase clock signal relative to the internal oscillator. It is used to synchronize a second MAX16936/MAX16938 in a cascaded configuration-reducing input/output ripple and enabling higher total output current without increasing EMI. A pull-up resistor (100Ω–1kΩ) to OUT sets proper logic levels for 2MHz operation.

Is the MAX16936SATEA/V+T AEC-Q100 qualified, and what grade does it meet?

Yes, the MAX16936SATEA/V+T is AEC-Q100 qualified for Grade 0 (−40°C to +150°C junction) and Grade 1 (−40°C to +125°C ambient) operation. Its qualification covers stress tests including HTOL, TC, UHAST, and ESD-ensuring reliability in under-hood automotive environments where thermal cycling and voltage transients are routine.