AMS1117-3.3S

AMS1117-3.3S is the UMW (UTD Semiconductor) fixed 3.3 V low-dropout regulator in SOT-89, written word-for-word in the ordering information of the UMW datasheet, where the final S is the SOT-89 package code and the packing is tape at 1,000 pieces. UMW publishes no lifecycle grading for the part; the code stands in the maker’s current datasheet ordering table. Every figure on this page is UMW’s own: an output of 3.234 V minimum, 3.300 V typical and 3.366 V maximum — a ±2 % band — dropout of 1.20 V typical and 1.30 V maximum at 1 A, quiescent current of 5 mA typical and 10 mA maximum, and PSRR of 60 dB minimum and 75 dB typical. The selection point is the 1 A-class 3.3 V rail in the tabbed SOT-89 body, from a domestic maker publishing its own guaranteed limits. Selection advice: the AMS1117 designation is made by many vendors with different dropout and tolerance figures, and a same-name offer is not this device; qualify the UMW code against the UMW document and state the maker in the RFQ. Parameters verified against the UMW AMS1117 datasheet (ordering information and electrical characteristics).