The MAX17612AATB+T is an overvoltage and undervoltage protection device from Analog Devices, designed to guard downstream circuitry against supply rail faults. It handles a 4.5V to 60V input range, drawing only 890µA quiescent current, and is specified across -40°C to 125°C. Typical applications include 24V and 48V industrial systems, telecom power feeds, and automotive battery lines where a single fault can take out an entire board. The 10-TDFN (3x3mm) package with exposed pad keeps the footprint small, but the pad needs a solid via-stitched thermal plane to the ground layer if you plan to run sustained current near the part's limit.
Supply range and quiescent current
The 4.5V to 60V supply range covers common industrial rails — 12V, 24V, 48V — with margin on both ends. For a 24V system, the part sits comfortably in the middle of its operating window, so you get headroom for transients without needing a separate pre-regulator. The 890µA supply current is low enough for always-on supervisory circuits; if you are powering it from a battery-backed 5V standby rail, that draw is negligible against the overall system budget.
Without a proper via array to the ground plane, junction temperature climbs fast when the protector is passing continuous current at high ambient.
The part is ROHS3 compliant. For volume production, this is a straightforward line item to commit to the BOM.