LM3880MFE-1AA/NOPB

The LM3880 simple power supply sequencer offers
the easiest method to control powerup sequencing
and powerdown sequencing of multiple Independent
voltage rails. By staggering the startup sequence, it is
possible to avoid latch conditions or large in-rush
currents that can affect the reliability of the system.
Available in a 6-pin SOT-23 package, the simple
sequencer contains a precision enable pin and three
open-drain output flags. The open-drain output flags
permit that they can be pulled up to distinct voltage
supplies separate from the sequencer VDD (only if
they do not exceed the recommended maximum
voltage of 0.3 V greater than VDD), so as to interface
with ICs requiring a range of different enable signals.
When the LM3880 is enabled, the three output flags
sequentially release, after individual time delays, thus
permitting the connected power supplies to start up.
The output flags follow a reverse sequence during
power down to avoid latch conditions.
EPROM capability allows every delay and sequence
to be fully adjustable. Contact Texas Instruments to
request a non-standard configuration.