dumping PDF document ( *.pdf) to Text?

You've got two free options, as far as I can tell.

First, there is a command line tool in the xpf package freely available from http://www.foolabs.com/xpdf

Then, another command line tool in the http://mupdf.com project

Both can be called easily from Delphi. I used the pdftotext.exe file from xpdf without any problem.

PDFtext can do it. You'll have to pay $57 and deploy additional dll, though.