Can't find any info, so decided to ask:
I have battery powered device that needs 80mA @5V and 120mA 3.3V
I am planning to use 4 AA batteries that gives me about 6V if fresh.
Device will be powered for about 10 minutes at the time so I expect relatively long batttery life.
I can easily get 3.3V from 5V (7833), but what will be easiest and cheap way to get stable 5V +0.2V/-0.5V from the battery.
Any special ICs or circuit designs?
Also I would like to have reverse polarity protection.
I understand that getting 3.3V from 5 using linear regulator is not the best way, so I may need to generate 3.3V from battery directly.
5V side used for PIC18F and LCD display.
Thanks
I have battery powered device that needs 80mA @5V and 120mA 3.3V
I am planning to use 4 AA batteries that gives me about 6V if fresh.
Device will be powered for about 10 minutes at the time so I expect relatively long batttery life.
I can easily get 3.3V from 5V (7833), but what will be easiest and cheap way to get stable 5V +0.2V/-0.5V from the battery.
Any special ICs or circuit designs?
Also I would like to have reverse polarity protection.
I understand that getting 3.3V from 5 using linear regulator is not the best way, so I may need to generate 3.3V from battery directly.
5V side used for PIC18F and LCD display.
Thanks