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Explanation: It's probably this: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1901
In other words, a step-up voltage converter that (in this case) triples the input voltage.
If you want to take it literally, it would just be "voltage tripler", and this is probably the safest bet for what to use here. (The MAX668 doesn't really work that way, though, it regulates to a set output voltage. But never mind that.)