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My current favorites come from Linear Technology. They certainly have =
some that go down to low input levels. They do have a reasonable web =
based selector that allows you to enter your input and output =
parameters, and show you the suitable devices. They also provide samples =
- which for hobbyist use is great.

>I'm designing a handheld navigation device. It's a prototype for a
>device which may or may not become a production item at some time in
>the future, but for now it's basically a hobbyist effort. I'd like to
>power it from two NiMH AA batteries and I need supply rails of 5V and
>3.3V. The current required is pretty low under 100mA on the Battery
>life is a consideration, as is size.
>
>Does anyone have a preferred switching regulator to use in this
>application? The main limiting factor is that relatively few boost
>switchers will operate from the 2.4V I'll be getting from the
>batteries.


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