Fairchild Semiconductor brings designers of cell phones, medical, portable and consumer applications one of the industry's lowest RDS(ON) (75m at -4.5V) 20V P-Channel MOSFET in a 1 mm x 1 mm WL-CSP package. The FDZ371PZ is designed with Fairchild's proprietary PowerTrench® process technology. This technology yields an exceptionally low RDS(ON), minimizing conduction losses. Through these lower losses, the FDZ371PZ improves efficiency and extends battery life for portable designs. It also provides robust ESD protection of 4.4 kV to protect against adverse ESD events. The FDZ371PZ's WL-CSP package utilizes 4 x 250 µm lead-free solder balls, providing excellent electrical and thermal resistance values.