Here is how to construct a standard application circuit based on the :
Based on the alphanumeric code and the request for a "schematic top," it is highly likely that you are dealing with a printed circuit board (PCB) or a specific electronic module where this designation refers to the component placement on the top side of the board. lac781p schematic top
Some also include a reverse protection diode (1N4001) from Vout to Vin, and a small LED + resistor on the output as a power indicator. Here is how to construct a standard application