MILPITAS, Calif. – Intersil is introducing the ISL70321SEH and ISL73321SEH radiation-hardened quad power supplysequencers designed to drive point-of load (POL) regulators that power high performance field-programmable gate arrays (FPGAs) and complex, multi-rail power systems.
Designers can sequence as many as four power supplies with one device, or cascade several devices to sequence an unlimited number of power supplies.
Intersil's radiation-hardened power supply sequencers ensure high reliability operation with fault monitoring to boost system health and performance, and they are space-grade sequencers backed by single-event effects (SEE) mitigation tests and complete radiation assurance testing.
The ISL70321SEH sequencer is radiation assurance tested to 100krad(Si) at high dose rate and 75krad(Si) at low dose rate, while the ISL73321SEH is assurance tested to 75krad(Si) at low dose rate.
Both sequencers help achieve the proper power-up and power-down sequencing of DC-DC converters essential to powering FPGAs, DSPs, RF communications ICs, and high-density distributed power systems.
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They simplify design by using minimal external components, only requiring two resistors per power supply for voltage monitoring, and one resistor to program the rising and falling delay.
The integrated sequencers can help reduce bill of materials cost by replacing discrete solutions that employ several comparators, resistors, and capacitors.
To ensure accurate monitoring and reliable system operation, the ISL70321SEH and ISL73321SEH integrate precision input comparators with an input threshold voltage of 600-millivolt plus-or-minus 1.5 percent. Both devices monitor seven different fault conditions to provide fault detection, and a DONE indicator gives system feedback that power-up and power-down have completed.
The ISL70321SEH and ISL73321SEH radiation-hardened quad power supply sequencers are available in an 18-lead 10-by-12-millimeter CDFP package or in die form.
For more information contact Intersil online at www.intersil.com.
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