The requested file:
https://pdf.datasheetcatalog.com/datasheet2/2/04f4xqjfc7u4st0422garww9u3py.pdf
is the data sheet for the following electronic components:

National Semiconductor

#	Part Name	Description
1	LM2578 MDC	Switching Regulator
2	LM2578A MDC	Switching Regulator
3	LM2578A MWC	Switching Regulator
4	LM2578AM	Switching Regulator
5	LM2578AMX	Switching Regulator
6	LM2578AN	Switching Regulator
7	LM3578A MWC	Switching Regulator
8	LM3578AM	Switching Regulator
9	LM3578AMX	Switching Regulator
10	LM3578AN	Switching Regulator

Select the part name and then you can download the datasheet in PDF format.