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POL regulator packs fault protector

Posted: 16 Feb 2010     Print Version  Bookmark and Share

Keywords:buck regulator  POL  satellite 

ISL70001SRH POL regulator

Intersil Corp. has launched a reliable, efficient, single-chip point-of-load (POL) synchronous buck regulator for use in systems that requires POL power in extreme temperature and radiation-intensive environments.

The ISL70001SRH is a complete power solution designed for use in systems that required POL power like satellite systems, nuclear reactor equipment, down hole drilling applications, and other high-reliability systems. It integrates 6A power MOSFETs, MOSFET drivers and a 1MHz PWM controller in a single compact package. Two ISL70001SRH devices can be synchronised 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 <1 pulse perturbation at the switching node up to an LET = 86.4MeV/mg/cm squared. Total ionizing dose (TID) capacity is 100Krads(Si) and is offered in Class V and Class Q manufacturing flows electrically screened to DSCC SMD# 5962-09225. The combination of excellent SET and TID characteristics makes the ISL70001SRH a logical design choice to power many of today's small form-factor applications.

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 per cent of the input voltage. Output current capability is 6A for TJ up to +145°C. An analogue 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 under-voltage, output under-voltage and output over-current.

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 Rs.2.10 lakh ($4,546) each for less than 25 pieces. The ISL70001SHR/proto is priced at Rs.39,573.69 ($857).

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