The Intel® Enpirion® ES1020QI is an integrated 4-channel controlled-on/controlled-off power supply sequencer with supply monitoring, fault protection and a “sequence completed” signal (RESET).
For larger systems, more than 4 supplies can be sequenced by simply connecting a wire between the SYSRESET pins of the cascaded ICs. The ES1020QI offers the designer 4-rail control when all four rails must be in minimal compliance before turn-on and during operation.
The ES1020QI uses a charge pump to drive four external low-cost NFET switch gates above the supply rail by 5.3V. External resistors provide flexible voltage threshold programming of monitored rail voltages. Delay and sequencing are provided by external capacitors for ramp-up and ramp-down.