SGM864S
DESCRIPTION
The SGM864S is an integrated, 4-rail power sequencer. It controls the power-up and power-down sequence of four power supplies by pulling their enable or shutdown pins high or low. Staggered start sequence can avoid the impact of latch conditions or large inrush current on system reliability.
The device has five open-drain outputs that are controled by five enable pins. When the EN pin is pulled high and the ENx pin is high, each of the four outputs (OUT1 to OUT4) is released after a fixed delay time, which can be adjusted by the NP0 capacitor outside the CDLYx pin. When EN remains high and any ENx is pulled low, the OUTx will be shut down correspondingly. When ENx remains high and EN is pulled low, the outputs are pulled low in reverse order (from OUT4 to OUT1) after CDLY programmable delay time. If the four OUTx all output high, the PG pin outputs high.
The SGM864S also includes an internal clamp voltage regulator that stabilizes the internal reference voltage at 5V with...
