AP68255Q

AP68255Q is a Diodes Incorporated non-synchronous buck converter in an SO-8EP package — an automotive wide-input step-down regulator accepting 5.5 V to 80 V and delivering up to 2.5 A, with output adjustable from 1.2 V to 50 V, switching at 300 kHz under constant-on-time control. It is AEC-Q100 Grade 1 qualified for body and under-hood electronics fed from harsh vehicle rails. Per datasheet DS47151 (shared with the AP68355Q), the orderable code is AP68255QSP-13 — the SP-13 suffix is the SO-8EP tape-and-reel order form. Selection advice: the 80 V input ceiling is the point of this family — it absorbs load-dump and jump-start transients that destroy 40 V-class regulators, at the cost of a freewheel-diode drop at high current; for continuous full-load designs compare efficiency against the 3.5 A AP68355Q on this site, which shares the datasheet and pin concept. Size the diode and inductor for the worst-case low-output, high-input corner, and design to the DS47151 electrical table where summary feature text and datasheet values differ. Parameters verified against Diodes Incorporated documentation.