Boost converter IC
Nothing especially startling but seems to be a good all rounder.

NCP1406 from ON Semi
1.4 - 5.5v in -> <=25v out.
Shutdown 0.3uA.
Operating non switching 15 uA (ie output voltage at setpoint)
1.8v startup at no load so 2 x NimH OK
Inbuilt FET switch.
85% ish efficiency
3mm x 1.5mm TSOP-5 package.
7 parts total including IC and Capacitors in basic form.
Good for eg White LED drive.
Hi freq, small inductor (10 uH)
Shutdown mode.

        http://www.onsemi.com/site/products/summary/0,4450,NCP1406,00.html

Excellent 25 page data sheet and application note

    http://www.onsemi.com/pub/Collateral/NCP1406-D.PDF



        RM 

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