FTM Board Club
ISL91127IR buck-boost regulator with fixed 3.3V voltage

The ISL91127IR is a high-current buck-boost switching regulator for systems using new battery chemistries. It uses Renesas' proprietary buck-boost algorithm to maintain voltage regulation, while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage.

  • Small, compact design
  • Jumper selectable EN (enabled/disabled)
  • Jumper selectable mode (auto PFM/forced PWM)
  • Connectors, test points and jumpers for easy probing
  • Resistor programmable output voltage on the ISL91127IRA-EVZ
  • Fixed 3.3V output voltage on the ISL91127IRN-EVZ