This Part Name is FDZ1040L.
This is Semiconductor.
This product has Integrated Load Switch functions.
Manufacturers of the product is Fairchild Semiconductor
Image and pinout :
FDZ1040L — Integrated Load Switch April 2013 FDZ1040L Integrated Load Switch Features Optimized for Low-Voltage Core ICs in Portable Systems Very Small Package Dimension: WLCSP 0.8 X 0.8 X 0.5 mm3 Current = 1.2 A, VIN max = 4 V Current = 2 A, VIN max = 4 V (Pulsed) RDS(on) = 80 mΩ at VON = VIN = 4 V RDS(on) = 85 mΩ at VON = VIN = 3.6 V RDS(on) = 90 mΩ at VON = VIN = 3 V RDS(on) = 110 mΩ at VON = 0.7 V, VIN = 1.6 V RDS(on) = 309 mΩ at VON = 0.7 V, VIN = 1 V RoHS Compliant Description This device is particularly suited for compact power management in portable applications needing 1 V to 4 V input and 1.2 A output current capability. This load switch integrated a level-shifting function that drives a Pchannel power MOSFET in a very small 0.8 X 0.8 X 0.5 mm3 WLCSP package. Applications Load Switch Power Management in Portable Applications GND ON VOUT VIN Pin 1 Figure 1. Bottom View Figure 2. Top View Ordering Information Part [ ... ]