Hi all,
In a project I'm working on I've a couple of different circuits that run off four different voltages (+9V, -9V, 5V and 3.3V). The device is portable and runs off a bank of 9V batteries, and these feed four regulators to provide the voltages. During operation, I need to kill the power to some circuits and not others, which I plan to do via digital pins from a uprocessor.
My question is, what is the best circuit to look into to achieve this? I need some with very low quiescent currents because power consumption is the biggest constraint. I've noticed that some regulators have enable pins, but the ones I plan to use dont so I need to design up a switch instead.
Any suggestions much appreciated!
In a project I'm working on I've a couple of different circuits that run off four different voltages (+9V, -9V, 5V and 3.3V). The device is portable and runs off a bank of 9V batteries, and these feed four regulators to provide the voltages. During operation, I need to kill the power to some circuits and not others, which I plan to do via digital pins from a uprocessor.
My question is, what is the best circuit to look into to achieve this? I need some with very low quiescent currents because power consumption is the biggest constraint. I've noticed that some regulators have enable pins, but the ones I plan to use dont so I need to design up a switch instead.
Any suggestions much appreciated!