I have a circuit that requires 3.3V DC (typically) to operate. It also has a minimum required voltage of 2.97V DC. Because of design size restrictions, I was hoping to use 2 AAA batteries to power the circuit. This would give me a maximum voltage of 3.0V DC (ideally conditions). Is there anything out there capable of generating a higher output voltage than the input source, so that even if the voltage drops below
2.9V my output voltage for my circuit remains constant at 3.3V?Steph
How about a
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If you are going to use a boost regulator anyway, consider starting with one AA cell. It appears to me that there is more energy available in a AA cell than there is in two AAA cells.
See the relevant datasheets at:
In particular, the Amp-hour rating of the AAA cell when discharged at
250 mW is around 0.78 Amp-hours. This uses 0.8 V as the cutoff threshold.For the AA cell under the same conditions, the Amp-hour rating is around
2.2 Amp-hours.By the way, how much current do you need at 3.3 V? If you need very low current for a very long time, I don't think typical boost regulation schemes will be feasible, but I'm not an expert.
--Mac
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