PVDD1PGND2NC3SW4PGND5PGND6PGND7PGND8SW9SW10SW11SW12PVIN13PVIN14PVIN15PVIN16PVIN17PVIN18PVIN19BST20PGND21CS22SGND23FB24PG25EN26VIN27VDD28PGND29SW30PVIN31