battery powerd system

Hi,
I want to project controller board powered by 2 AAA batteries. It should have power down-wake up functionality (for long battery life) and serial communication. Are there any low power supply versions with 8032 core or better use a high efficiency step up regulator (than I could use my 5V programming environment).

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  • Try the AT89C1051U. It will work down to 2.7V input. It also has a Idle and Power down mode. Its small (20 pin SOIC) and in Idle mode will pull 1mA and pull 20 uA!! in power down mode.(both at @3V and 12 MHz)

    For your serial port, try the MAX3229 series. It is a 2RX/2TX topology and it too will work down at 2.5V (and less I think) and has shut down and will pull only 0.3mA in AutoShutdown Mode. If you cannot use the UCSP package, try the MAX3323. It is quite a bit bigger and pulls about a 1mA @3V.

    In general, I recommend against any power supplies at all. They just burn power that could be used to directly power low voltage devices. I am sure Maxim or Linear have a simple 2.7V to 5V boost regulator that you could use if you wanted to.

    MG

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  • Try the AT89C1051U. It will work down to 2.7V input. It also has a Idle and Power down mode. Its small (20 pin SOIC) and in Idle mode will pull 1mA and pull 20 uA!! in power down mode.(both at @3V and 12 MHz)

    For your serial port, try the MAX3229 series. It is a 2RX/2TX topology and it too will work down at 2.5V (and less I think) and has shut down and will pull only 0.3mA in AutoShutdown Mode. If you cannot use the UCSP package, try the MAX3323. It is quite a bit bigger and pulls about a 1mA @3V.

    In general, I recommend against any power supplies at all. They just burn power that could be used to directly power low voltage devices. I am sure Maxim or Linear have a simple 2.7V to 5V boost regulator that you could use if you wanted to.

    MG

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