Analog Devices Inc./Maxim Integrated MAX16935BAUES/V+

Overview

MAX16935BAUES/V+ from Maxim Integrated is a 3.5A, current-mode synchronous step-down converter with integrated high-side and low-side MOSFETs, designed for automotive power rails. It operates from 3.5V to 36V input, delivers fixed 5V output (±2% accuracy), sustains 98% duty cycle during cold-crank transients, and draws only 28µA quiescent current-enabling always-on infotainment and ADAS domain controllers.

For engineers reviewing the MAX16935BAUES/V+ datasheet, MAX16935BAUES/V+ pinout, MAX16935BAUES/V+ application, or MAX16935BAUES/V+ equivalent, key selection criteria include AEC-Q100 qualification, 2.2MHz resistor-programmable switching frequency, FPWM/skip mode control via FSYNC, 180° out-of-phase SYNCOUT for cascaded supplies, and integrated thermal shutdown with automatic recovery.

Technical Context

The MAX16935BAUES/V+ implements current-mode control with cycle-by-cycle overcurrent protection and automatic LX slew-rate adjustment-4ns rise time at >1.1MHz operation-to minimize EMI while preserving efficiency. Its dual supply inputs (SUP and SUPSW) decouple logic and switch driver power paths, enabling stable operation down to 3.5V input during automotive cold-crank events.

It features a 5V BIAS linear regulator (4.7–5.4V output, ±2.95–3.40V UVLO), open-drain PGOOD with 95%/92% VFB thresholds, and 180° phase-shifted SYNCOUT for interleaved multi-phase designs. Overvoltage protection triggers at 107% of regulated output, and thermal shutdown activates at +175°C with 15°C hysteresis.

Key Specifications

Pinout & Package

MAX16935BAUES/V+ is housed in a 16-pin, 5mm × 5mm TQFN-EP package with exposed thermal pad (EP) connected to PGND. The package supports high thermal conductivity and compact placement in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16939BAUES/V+, the MAX16935BAUES/V+ provides higher OVP threshold for less aggressive clamping, while versus LM61480QRNXTQ1 it delivers greater system-level integration (BIAS LDO, SYNCOUT, FPWM/skip control) in a smaller 16-pin package-reducing total solution size and design validation effort.

Availability

MAX16935BAUES/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16935BAUES/V+ 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 and mixed-signal ICs for automotive, industrial, and communications markets-with emphasis on reliability, integration, and power efficiency.

The MAX16935/MAX16939 product line targets automotive power management, delivering AEC-Q100-qualified DC/DC converters with ultra-low IQ, wide VIN range, and robust fault protection for next-generation E/E architectures.

FAQ

What is the output voltage configuration of the MAX16935BAUES/V+?

The MAX16935BAUES/V+ provides a fixed 5V output with ±2% accuracy over temperature and line. This is achieved by connecting the FB pin directly to the BIAS pin-no external resistor divider is required. The device does not support adjustable output voltage in this variant; alternative versions like MAX16935AEUS/V+ offer resistor-programmable outputs from 1V to 10V.

How does the MAX16935BAUES/V+ handle automotive cold-crank conditions?

The MAX16935BAUES/V+ supports cold-crank operation through its 98% maximum duty cycle and dual-supply architecture (SUP/SUPSW). When input drops to 4.5V, it maintains regulated 5V output by extending on-time-verified across −40°C to +125°C. Its 3.5V minimum input rating and 42V transient tolerance ensure uninterrupted power during engine start and load-dump events.

Can the MAX16935BAUES/V+ be synchronized to an external clock?

Yes-the FSYNC pin accepts an external clock signal (1.8MHz–2.6MHz, ±20% of internal fSW) to synchronize the MAX16935BAUES/V+ switching frequency. When active, the device locks within one cycle; if the external clock is absent for >2 cycles, it reverts to internal oscillator operation. Spread-spectrum modulation is disabled during external sync.

What thermal management provisions does the MAX16935BAUES/V+ include?

The MAX16935BAUES/V+ integrates thermal shutdown at +175°C (with 15°C hysteresis) and uses a thermally enhanced TQFN-EP package. Its exposed pad (EP) must be soldered to a large PGND copper area to achieve θJA = 35°C/W. Derating begins above +70°C ambient (28.6mW/°C), supporting continuous 3.5A operation in properly heatsinked automotive layouts.

Is the MAX16935BAUES/V+ pin-compatible with other variants in the MAX16935/MAX16939 family?

Yes-MAX16935BAUES/V+ shares identical pinout, package (16-pin TQFN-EP), and footprint with all MAX16935 and MAX16939 variants, including MAX16935AEUS/V+, MAX16939BAUES/V+, and MAX16939AEUS/V+. Functional differences (e.g., OVP threshold, output adjustability) are masked at the board level, enabling drop-in replacement where specifications align.