Analog Devices Inc./Maxim Integrated MAX16907RAUE/V+T

Overview

MAX16907RAUE/V+T from Maxim Integrated is a 3A, current-mode, automotive-grade step-down DC-DC converter with integrated 70mΩ high-side MOSFET, operating from 3.5V to 36V input and delivering 5V fixed or 1V–10V adjustable output. It features 2.2MHz switching frequency (adjustable 1–2.2MHz), 30µA no-load quiescent current, and operates across –40°C to +125°C for engine control units and ADAS power rails.

For engineers reviewing the MAX16907RAUE/V+T datasheet, MAX16907RAUE/V+T pinout, MAX16907RAUE/V+T application, or MAX16907RAUE/V+T equivalent, key selection criteria include its 42V transient tolerance, 98% max duty cycle during cold-crank undervoltage events, spread-spectrum EMI reduction (factory-enabled), and dual-supply architecture (SUP/SUPSW) enabling stable operation under wide-input automotive battery conditions.

Technical Context

The MAX16907RAUE/V+T implements constant-frequency current-mode control with an internal transconductance error amplifier (gm = 900µS), 80ns minimum on-time, and fast load-transient response enabled by integrator-loop enhancement. Its dual-input supply architecture isolates bias generation (SUP → BIAS LDO) from switch drive (SUPSW → LX), allowing regulation down to 3.5V input while sustaining >95% duty cycle during cold-crank.

It supports resistor-programmed frequency (RFOSC = 12kΩ sets 2.2MHz), external clock synchronization (FSYNC input accepts 10% higher f_OSC), and skip-mode operation below 300mA load to maintain sub-30µA standby current. Overvoltage protection triggers at 110% V_FB, thermal shutdown activates at +175°C with 15°C hysteresis, and PGOOD monitors output within ±5% of regulation threshold.

Key Specifications

Pinout & Package

MAX16907RAUE/V+T is packaged in a 16-pin TQFN (5mm × 5mm) with exposed pad, optimized for automotive thermal performance (θ_JA = 35°C/W, θ_JC = 2.7°C/W). The exposed pad must be soldered to a large contiguous copper ground plane for effective heat dissipation and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM61480-Q1 and TPS62903-Q1, the MAX16907RAUE/V+T uniquely combines 3.5–36V operation, 42V transient tolerance, 98% cold-crank duty cycle, and factory-enabled spread spectrum-making it the only option qualified for primary power conversion in harsh automotive environments without external protection circuitry.

Availability

MAX16907RAUE/V+T is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera modules, and industrial telematics gateways requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.

Supply support for MAX16907RAUE/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 MAX16907RAUE/V+T belongs to Maxim's automotive power management portfolio, designed specifically for demanding vehicle electrical systems requiring wide-input operation, ultra-low quiescent current, and robust transient immunity.

FAQ

What is the maximum input voltage transient the MAX16907RAUE/V+T can withstand?

The MAX16907RAUE/V+T is rated for 42V input transients lasting less than 1 second, meeting ISO 7637-2 Pulse 5a requirements for automotive load-dump protection. This rating is validated under absolute maximum conditions and does not require external TVS diodes for standard 12V/24V vehicle architectures. The device continues normal operation after transient clearance without latch-up or parameter shift.

Does the MAX16907RAUE/V+T support fixed 5V output without external resistors?

Yes, the MAX16907RAUE/V+T supports fixed 5V output by connecting the FB pin directly to the BIAS pin. This configuration eliminates external feedback resistors, reduces component count, and maintains 30µA quiescent current. Output accuracy is guaranteed at ±1.5% over temperature and line/load conditions per the datasheet's V_OUT specification (4.925V to 5.075V).

How does the MAX16907RAUE/V+T achieve 98% duty cycle during cold-crank conditions?

The MAX16907RAUE/V+T achieves 98% duty cycle through its dual-supply architecture: SUPSW powers the high-side switch independently of the BIAS LDO supplied by SUP. When input drops to 4.5V during cold-crank, SUPSW remains sufficient to drive the gate, while the control loop dynamically extends on-time. This is confirmed in the datasheet's "High Duty Cycle During Undervoltage Transients" feature and typical operating characteristics (toc11).

Is spread-spectrum modulation enabled by default on the MAX16907RAUE/V+T?

Yes, spread-spectrum modulation is factory-enabled on the MAX16907RAUE/V+T (denoted by the "S" suffix in the full part number family). It operates at ±6% frequency deviation around the 2.2MHz base with a 400µs triangular modulation period. The feature is automatically disabled when FSYNC is active, but external spread-spectrum clocks are accepted.

What is the recommended layout practice for the exposed pad (EP) of the MAX16907RAUE/V+T?

The exposed pad (EP) of the MAX16907RAUE/V+T must be soldered to a large-area contiguous copper ground plane using ≥6 thermal vias (0.3mm diameter, spaced ≤1mm apart). It serves as the primary thermal and EMI return path-not just a mechanical anchor. The datasheet specifies EP must be connected to GND; using it as the sole ground connection is insufficient-dedicated GND pins (Pin 8) must also be routed with low-inductance paths.