Isolated flyback in a small 12-TDFN package
The MAX17691AATC+ is an integrated isolated flyback switching regulator from Analog Devices, packing the controller and internal switch into a 12-TDFN (3x3 mm) package. It delivers up to 7.5 W with a wide input range of 4.2 V to 60 V, making it a fit for industrial and automotive auxiliary supplies where board space is tight. Switching frequency runs between 100 kHz and 350 kHz, which lets you balance transformer size against efficiency.
What the ratings mean for your BOM
The 7.5 W output power is the total you can pull from the isolated rail. The 68% duty cycle limits how much of each switching period the primary-side switch can be on. Fault protection includes current limiting, over-temperature, over-voltage, short-circuit, and UVLO — all on-chip. That means you can skip external supervisor ICs for most designs, saving board area and BOM cost. The -40°C to 125°C operating range qualifies it for outdoor telecom cabinets, motor drives, and under-hood automotive auxiliary supplies. No commercial-grade derating needed for harsh environments.
Active, no LTB risk
Marked as Active with ROHS3 compliance. No end-of-life notice or last-time-buy window to track.