The LP380502SD-ADJ integrated circuit consists of a low voltage drop-out (LDO) regulator with output up to 1.5 A provided in LLP-8 enclosure. The resistors R1 and R2 determine the output voltage, based on the circuit of Figure 1. The input voltage can be between 3 and 5 V for a 2.5 V output obtained with:
R1 = 19.1 kohms
R2 = 6.04 kohms
We remind you that National Semiconductor is now a member of the Texas Instruments group.