POL regulator handles radiation-intensive set-ups

Intersil Corp. has launched a reliable, efficient, single-chip point-of-load (POL) synchronous buck regulator for satellite systems, nuclear reactor equipment, down hole drilling applications, and other high-reliability systems.

The ISL70001SRH is a complete power solution designed for use in systems that required POL power in extreme temperature and radiation-intensive environments. It integrates 6A power MOSFETs, MOSFET drivers and a 1MHz PWM controller in a single compact package. Two ISL70001SRH devices can be synchronized 180° out-of-phase to reduce input RMS ripple current and the size of input filter components.

The regulator offers superior single event transient (SET) performance, with The ISL70001SRH operates over an input voltage range of 3V to 5.5V and provides a tightly regulated output voltage that is externally adjustable from 0.8V up to 85 percent of the input voltage. Output current capability is 6A for TJ up to +145°C. An analog soft-start circuit controls start-up, and can be adjusted from approximately 2ms to 200ms using an external capacitor. In addition, the ISL70001SRH incorporates fault protection for the regulator, with protection including input undervoltage, output undervoltage and output overcurrent.

Intersil offers Class V and Class Q manufacturing flows for the ISL70001SRH, which comes in a 48-lead ceramic quad flatpack (CQFP) and is also offered in class V die. Sample quantity pricing for the ISL70001SRHVF starts at $4,546 each for less than 25 pieces. The ISL70001SHR/proto is priced at $857.