The LM3880 Simple Power Sequencer offers the easiest method to control power up and power down 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-23-6 package, the Simple Sequencer contains a precision enable pin and three open-drain output flags. When the LM3880 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.
EPROM capability allows every delay and sequence to be fully adjustable. Contact Texas Instruments if a nonstandard configuration is required.
Qualified for Automotive Applications
AEC-Q100 Grade 1 Qualified
Manufactured on an Automotive-Grade Flow
Easiest Method to Sequence Rails
Power-Up and Power-Down Control
Low Quiescent Current of 25 µA
Input Voltage Range of 2.7 V to 5.5 V
Standard Timing Options Available
Customization of Timing and Sequence Available Through Factory Programmability