5 4 3 2 1 1 2 D 3 3 4 9 10 22 23 28 29 PVIN PVIN PVIN PVIN PVIN PVIN PVIN PVIN 24 SVIN TRACK 35 D SW SW SW SW SW SW SW SW 1 2 11 12 20 21 30 31 VFB 25 C C 5 PGOOD 7 RUN/SS PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND PGND RT 26 6 13 14 15 17 18 19 32 33 34 36 37 38 16 3 SGND SYNC/MODE VREF 2 8 27 1 ITH 1 2 3 B B A A 5 4 3 2 1