The LM3881 Simple Power Sequencer offers the easiest method to control power up and power
down of multiple power supplies (switching or linear regulators). By staggering the start-up
sequence, it is possible to avoid latch conditions or large inrush currents that can affect the
reliability of the system.
Available in VSSOP-8 package, the Simple Sequencer contains a precision enable pin and
three open-drain output flags. When the LM3881 is enabled, the three output flags will sequentially
release, after individual time delays, thus permitting the connected power supplies to start up.
The output flags will follow a reverse sequence during power down to avoid latch conditions. Time
delays are defined using an external capacitor and the output flag states can be inverted by the
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