DATASHEET
ISL70321SEH, ISL73321SEH FN8942
Rev.2.00
Nov 7, 2017 Radiation Hardened Quad Power Supply Sequencers The ISL70321SEH and ISL73321SEH are radiation
hardened and SEE mitigated power supply sequencers
designed to drive Point-of-Load (POL) regulators with
enable pins. Up to four power supplies can be fully
sequenced by a single device or multiple devices can be
easily cascaded to sequence an unlimited number of
power supplies for dense RF applications.
This power supply sequencer requires only two feedback
resistors per power supply and a single resistor to set the
rising and falling delay. The device features precision
input comparators with an input threshold voltage of
600mV В±1.5% for the highest possible accuracy when
monitoring the power supply voltages.
The ISL70321SEH and ISL73321SEH are offered in an
18 Ld 10mmx12mm CDFP package or die form and are
fully specified across the military ambient temperature
range of -55В°C to +125В°C.
With minimal external component count, precision
voltage monitoring, and SET mitigation, the
ISL70321SEH and ISL73321SEH are the ideal choice to …
