Lpc2000

Thanks for the responses.

That's a disapointment. According to the datasheet the LPC2106 uses about
10 uA on the 1.8V in power down - and a Max1616 regulator for 1.8 V will use about 8 uA 
so obviously the on chip 1.8V regulator has not been a good idea as far as power
is concerned. I think I expressed a concern about this concept earlier.

I'll probably stick with the PIC as I have all the development tools.

Owen


 Date: Thu, 23 Dec 2004 05:14:04 -0000
   From: "philips_apps" <philips_apps@...>
Subject: 
Re: Any experience of the LPC2130 under very low power?

Hello Owen,

we did some bench measurements, these will probably show up as typical
values in the data sheet for a later version:

If the device is in power down mode (the RAM content is kept and power
is supplied to Vdd), we measured approx. 150 uAs. The value is related
to the one voltage source 3.3V instead of having to provide 1.8V as
well. We have to generate the 1.8V internally, even during power down
because the RAM and the RTC run from 1.8V

The RTC itself can be buffered through a vbat pin. It uses approx.
15-20 uAs.  It is important to know that current from vbat is also
drawn during normal operation.

So, can't provide you with the 50 uAs requested but the value is MUCH
lower than the lpc2106 and you can log so much more data into the
flash than with an AVR Mega or a MSP430 but at the cost of a larger
battery.

Hope this helps, Robert