so based on your experience, what's the best way to terminate ins and outs to minimize sleep current ?


dld

On Sat, 4 Oct 2003 09:23:50 +0100, Ian Bell wrote:

>On Friday 03 Oct 2003 11:16 pm, you wrote:
>> Well I am thinking if the battery voltage was dropped the pic would be
>> using less current during sleep and DC-DC regulators use to much current
>> (for this purpose).  I am at 24uA currently during sleep, and hope to go
>> even lower. This will make the difference between using a AA or C size
>> battery.  About $5 difference for each unit that will be sold in qunatites
>> of ten thousands.
>>
>
>Not sure about the PIC but with most micros, sleep mode current is heavily
>dependent on the way the inputs and outputs are terminated.  I once was
>involved in the development of a CO2 detector wich had a sleep mode design
>target of 15uA which should have been achieveable.  When we got first masked
>parts it was 150uA!!.  Turned out to be due to duff info about the best way
>to terminate ins and outs to minimise sleep current.
>
>Ian
>
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David Dunn
Digital Racing Products

dave@digitalracingproducts.com
www.digitalracingproducts.com

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