Analog Devices Inc./Maxim Integrated MAX16907SAUE/V+T

Overview

MAX16907SAUE/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 30µA standby current, 2.2MHz switching frequency (adjustable 1–2.2MHz), and operates across –40°C to +125°C for engine control units and ADAS power rails.

For engineers reviewing the MAX16907SAUE/V+T datasheet, MAX16907SAUE/V+T pinout, MAX16907SAUE/V+T application, or MAX16907SAUE/V+T equivalent, key selection criteria include its 42V transient tolerance, 98% max duty cycle during cold-crank, spread-spectrum EMI reduction (S-version), power-good monitoring, and TSSOP-16 package with exposed pad for thermal management.

Technical Context

The MAX16907SAUE/V+T implements constant-frequency current-mode control with internal transconductance error amplifier (gm = 900µS), 80ns minimum on-time, and fast load-transient response enabled by integrator architecture enhancements. Its dual-supply inputs (SUP and SUPSW) decouple bias and switch drive paths, enabling stable operation during undervoltage transients down to 3.5V.

It supports resistor-programmed oscillator (RFOSC = 12kΩ → 2.2MHz), external clock synchronization (FSYNC), skip mode below 300mA load, and integrated protections including overcurrent (ILX = 3.4–6A), overvoltage (110% VFB trip), thermal shutdown (+175°C), and soft-start (8.5ms). The BIAS LDO delivers 5V ±1.5% at up to 100mA for internal circuitry.

Key Specifications

Pinout & Package

MAX16907SAUE/V+T is housed in a 16-pin TSSOP package with exposed pad (EP), optimized for thermal dissipation in space-constrained automotive modules. The exposed pad must be soldered to a large contiguous copper ground plane; it is not a functional signal but critical for thermal performance (θ_JA = 38.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16907SAUE/V+T, LM61480QRTWRQ1 offers higher current but lacks cold-crank robustness and EMI dither, while TPS62933RTER provides wider frequency range but omits automotive safety features and qualification - making MAX16907SAUE/V+T the only option with integrated PGOOD, 42V tolerance, and AEC-Q100 compliance in this footprint.

Availability

MAX16907SAUE/V+T is available at Aetrix Electronics and suitable for automotive ECU power supplies, ADAS camera modules, infotainment head units, and telematics gateways requiring stable component supply across extended temperature and transient conditions.

Supply support for MAX16907SAUE/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 MAX16907 belongs to Maxim's automotive power management portfolio, designed specifically for harsh-environment DC-DC conversion in engine compartments and ADAS subsystems with stringent EMI, reliability, and thermal requirements.

FAQ

What is the maximum input voltage transient the MAX16907SAUE/V+T can withstand?

The MAX16907SAUE/V+T withstands 42V input transients for durations under 1 second, complying with ISO 7637-2 Pulse 5a (load dump) requirements without external TVS diodes. This rating is validated per Absolute Maximum Ratings table and applies to both SUP and SUPSW pins. The device enters hiccup mode during sustained overvoltage but resumes normal operation once the transient clears - a key reliability feature for automotive battery systems.

Does the MAX16907SAUE/V+T support fixed 5V output without external resistors?

Yes, the MAX16907SAUE/V+T supports fixed 5V output by connecting the FB pin directly to the BIAS pin, eliminating the need for an external resistor divider. In this configuration, the output is regulated to 4.925V–5.075V (typical 5V) across –40°C to +125°C and line/load conditions. This simplifies design, reduces BOM count, and improves accuracy versus resistor-based feedback networks subject to drift.

How does the MAX16907SAUE/V+T achieve low quiescent current in standby mode?

The MAX16907SAUE/V+T achieves 30µA typical standby current by dynamically powering internal circuitry from VOUT (when 3V ≤ VOUT ≤ 5.5V) instead of SUP/SUPSW during light-load skip mode. When inductor current drops below 300mA, the controller disables most bias circuitry and draws only from the output rail - reducing battery drain in always-on automotive systems such as CAN wake-up receivers and security modules.

What package type and thermal characteristics apply to the MAX16907SAUE/V+T?

The MAX16907SAUE/V+T uses a 16-pin TSSOP package with exposed thermal pad (EP). Its junction-to-ambient thermal resistance is 38.3°C/W on a 4-layer JEDEC-standard board. The EP must be soldered to a large contiguous copper ground plane; using it as the sole ground connection is insufficient. Thermal performance directly impacts maximum continuous output current - at +70°C ambient, full 3A load is sustainable with adequate copper area.

Can the MAX16907SAUE/V+T be synchronized to an external clock, and what are the requirements?

Yes, the MAX16907SAUE/V+T can synchronize to an external clock applied to the FSYNC pin. The external clock frequency must exceed the internal oscillator frequency by at least 10% (e.g., ≥2.42MHz for nominal 2.2MHz operation) and meet logic thresholds: V_{FSYNC_HI} ≥1.4V, V_{FSYNC_LO} ≤0.4V. Synchronization disables internal spread spectrum but preserves all other functions including PGOOD, soft-start, and protections - ideal for noise-sensitive systems like radar or audio.