The requested file:
https://pdf.datasheetcatalog.com/datasheet2/c/0hdpx9hfq92rohqdld4w73jwwrfy.pdf
is the data sheet for the following electronic components:

National Semiconductor

#	Part Name	Description
1	LM2596S-12	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
2	LM2596S-3.3	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
3	LM2596S-5.0	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
4	LM2596S-ADJ	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
5	LM2596SX-12	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
6	LM2596SX-3.3	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
7	LM2596SX-5.0	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
8	LM2596SX-ADJ	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
9	LM2596T-12	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
10	LM2596T-3.3	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
11	LM2596T-5.0	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator
12	LM2596T-ADJ	SIMPLE SWITCHER Power Converter 150 KHz 3A Step-Down Voltage Regulator

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