1 2 3 4 4 3 2 1 R1540N (SOT-23-5) Pin ConfigurationR1540S (HSOP-8E) Pin Configuration1R1540N Pin DescriptionsPin No.SymbolDescription 1 CE/ADJ Chip Enable and Adjustment Pin (Active - High) 2 GND(2) Ground Pin 3 VDD Input Pin 4 VOUT Output Pin 5 GND(2) Ground Pin R1540S Pin DescriptionsPin No.SymbolDescription 1 VDD Input Pin 2 VDD Input Pin 3 NC No Contact 4 CE/ADJ Chip Enable and Adjustment Pin (Active - High) 5 GND(2) Ground Pin 6 GND(2) Ground Pin 7 NC No Contact 8 VOUT Output Pin (1) The tab on the bottom of the package is substrate potential (GND). It is recommended that this tab to be connected to the ground plane on the board. (2) The GND pins must be wired together on the board. 3