From the "LEDS Magazine" web site:
Summary of Features: LTC3453
snip
Contact
Call toll-free 1-800-4-LINEAR (for literature only)
North America
John Hamburger
Tel: (408) 432-1900 ext. 2419
E-mail:
Web site: http://www.linear.com

I'd suggest you e-mail John Hamburger asking where you can obtain a
"prototyping kit" for use in a product you are developing.
Linear Technologies also sells/gives away such kits to potential customers.

They'll be disappointed that you aren't ready to discuss the project yet.

(You should have heard the strange follow-up phone calls I got when I was
playing with the design of a steam car. Luckily, much of the work our group
was actually engaged in was classified.)

Roger

http://home.earthlink.net/~derbyrm

"OldNick" nsremovable.iinet.net.au wrote in message
...
I have searched till I am blue in the whatsit for a retail supply
store for the news(ish) buck-boost LED drivers (eg: LTC3453 -
Synchronous Buck-Boost High Power White LED Driver
), which look like the duck's nuts for setting up LED lamps, torches
etc.

I have seen a hundred articles about them, and prices per thousand
etc...but have seen not one site that retailed them.

I live in Australia, but if US store willsell to me, that's no biggy.

Thanks for any help