Re: dc/dc converter
Thanks, all. If using 2 LR44 in series, it may be a bit wasteful as I need to throw them away when the in-series voltage drop below 2.7 volts. In addition,, the active current is around 20mA for the device. The lifespan could be quite short if i cut it off at 2.7volt. And also there is one chip's operating voltage at 3 volt. Then no choice, i need a regulated 3 volt source. Rechargable battery is one way, but charger is needed, which could be barrier to the consumers. May not be able to go into it at the moment.
Now the quiescent current goes down to 13uA after i change the low ESR cap to a normal one at the i/p and o/p stages. But still need some ways to reduce it.
Any other ideas?
Thanks.
Wanchope