Have you ordered samples from them? I ordered some on the 19th and they 
said 2-7 days, but they aren't here yet.

Alan B. Pearce wrote:
>>>Have a browse around the Linear Technology web site. ISTR they do some
>>>single cell boost chips - and they provide samples.
>>>
>>
>>Something like this?
>>http://www.linear.com/pc/productDetail.do?navId=H0,C1,C1003,C1042,P1901
>>
>>I'm not very experienced with switchers :) I need 3V out at least, 1V
>>input, 250mA output. Looks like the circuit on p.13 might do?
>>http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1042,P1901,
> 
> D2814
> 
> That could be a possibility, but also look at LT1615 (1.2 to 15V input,
> ThinSOT package), LTC3400/3400B ((0.85 to 5V input, ThinSOT package),
> LTC3401 (0.5 to 5V input, output 6V max, MS package).
> 
> As to not being experienced with switchers, choose a recommended coil and
> capacitors from the suppliers recommended in the datasheet, and layout the
> pattern as they recommend, and there should not be much more to it.
> 
> I'm currently looking to have a play with the LT3470 step down switcher,
> which does 4 to 40V input, and outputs up to 200mA with a total of 8
> components including the IC. Seems like a real nice chip to use as a 78xx
> replacement in a lot of things where one is getting marginal because of heat
> dissipation. The whole thing could be built on a PCB that became a 78xx with
> low dissipation. ;)
> 


-- 
Hector Martin (hector@marcansoft.com)
Public Key: http://www.marcansoft.com/hector.asc

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