Overview

In this Reference Design, a supercapacitor is used as a backup power supply. The board allows for quick evaluation of the ISL85403 buck/boost controller in the two-stage boost buck configuration and the ISL9001A low dropout linear regulator. It is a cost-effective design for low-power, wide input voltage range point-of-load applications where both stepping up and stepping down voltage capabilities are required.

Buck-Boost Last Gasp Power Supply for Energy Meters Reference Design Board
Buck-Boost Last Gasp Power Supply for Energy Meters Reference Design Board
  • The ISL85403 controller can fully extract the power of the supercapacitor
  • Buck-boost with electrical double-layer capacitor (EDLC) backup with one ISL85403
  • Quiescent current is only 300µA
  • Very high discharge efficiency
  • Reliable solution for battery and EDLC-based never-stop systems

Documentation

= Featured Documentation
Type Title Date
Manual - Hardware
CN274-BBGASPPOCZ Power Supply with Supercapacitor User's Manual
PDF 2.27 MB
1 item

Design & Development

Software Downloads

= Featured
Type Title Date
PCB Design Files
Buck-Boost Last Gasp Power Supply for Energy Meter Design Files
Log in to Download ZIP 2.54 MB
1 item

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Buck-Boost Last Gasp Power Supply for Energy Meter

This design uses an ISL85403 synchronous buck or boost-buck controller in the buck-boost configuration to extract power from a supercapacitor (as low as 0.1V).