Intersil Introduces Fully-Integrated Synchronous POL Regulator for Low-Voltage ICs in Rad-Hard and High-Reliability Systems
Intersil Corp. released what it says is the industry’s most reliable, efficient, single-chip POL synchronous buck regulator for satellite systems, nuclear reactor equipment, down hole drilling applications, and other high-reliability systems.
The new 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 degrees 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 3 to 5.5V and provides a tightly regulated output voltage that is externally adjustable from 0.8V up to 85% 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 2 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.
