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How to manage a power-on/off sequence

mpiechotka

Simple ICs can be just connected almost directly to power source . However more complicated ones have rules about various supplied voltages such as that VCC_0 needs to be stable first before VCC_1 reaches certain level. While I'm aware that I can delay voltage by resistor and capacitor I think there are <blank> IC which allows to do it much more reliably. However I cannot find information about them as I don't know how <blank> are called.

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  • Depending on the type of regulators your using and the order in which the supplies need to turn on you might be able to just use the individual regulators.  if the highest voltage supply needs to be on before the lower ones then you can just drive the lower voltage supplies from the higher ones.  ie 5v reg/source -> 3.3v LDO -> 1.8v LDO

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  • Depending on the type of regulators your using and the order in which the supplies need to turn on you might be able to just use the individual regulators.  if the highest voltage supply needs to be on before the lower ones then you can just drive the lower voltage supplies from the higher ones.  ie 5v reg/source -> 3.3v LDO -> 1.8v LDO

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