This is my first post.
Im interested in using PIC's on single 1.5v battery, so I guess the PIC would have to operate over a range of ~1.2 to 1.5v.
As far as I know there are no pics that will operate in this range, but does anybody know of any DC-DC converter circuits/chips that would be suitable? Ideal characteristics would be:- low price, small size and low power consumption.
This is my first post.
Im interested in using PIC's on single 1.5v battery, so I guess the PIC would have to operate over a range of ~1.2 to 1.5v.
As far as I know there are no pics that will operate in this range, but does anybody know of any DC-DC converter circuits/chips that would be suitable? Ideal characteristics would be:- low price, small size and low power consumption.
Sarma, that Maxim part is perfect, I chose the MAX1724EZK50-T, just 1 inductor and 2 cap's needed for 5v at 150mA, 1.5µA quiescent supply current and up to 90% efficiency and around $3, all good
PIC's were designed around a higher voltage, there are plenty of ASIC's that will work natively on 1.5 volts but PICS are a general purpose chip. Modern battery boost switchers can be tacked on without much of a second look and are incredibly efficient. There's really no need to have a PIC that can nativly run off a single cell. Not to mention rechargeables are only 1.2 volts. Even then if the clock rate is slow enough you may be able to run a pic at those voltages, though I'm not so sure about startup.
The supply voltage itself is not an issue. For low-power applications, a PIC with nanoWatt Technology requires 50 nanoamperes in standby and a few hundreds microamperes when running. The PIC can run of 3 V (a small lithium battery), as watches and calculators do.