Multiple Voltage Systems Need Supply-Voltage Sequencing

Abstract: The following application note discusses multiple solutions for sequencing power supplies and sequencing reset outputs. It discusses the advantage and disadvantages of using a discrete solution versus a more integrated solution. The MAX6819/MAX6820 provides an excellent method for sequencing multisupply systems. The MAX6391/MAX6391 have sequenced output, which can be used for multivoltage and/or multiprocessor systems. The MAX16029 provides a space-saving solution for sequencing up to four power supplies.