Exar – XR76108/12/15: PowerBlox™ Synchronous Step Down COT Regulators

XR76108/12/15: PowerBlox™ Synchronous Step Down COT Regulators

The XR761xx family is specified with a wide input voltage range of 4.5V to 22V and delivers an adjustable output voltage from 0.6V to 18V. With its exceptional 0.1% line regulation across the entire input voltage range and 1% output accuracy over full temperature range, XR761xx provides increased headroom to engineers for easier design implementations. With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR761xx provide extremely fast line and load transient response using ceramic output capacitors.


  • 8A/12A/15A step down regulators
  • 4.5V to 5.5V low VIN operation
  • 5V to 22V wide single input voltage
  • >0.6V adjustable output voltage
  • Constant 200kHz to 800kHz frequency
  • Selectable CCM or CCM/DCM operation
  • Proprietary COT control
  • No loop compensation required
  • Ceramic output capacitor stable operation
  • Programmable 200ns to 2μs on-time
  • 6 x 6mm 30-pin QFN package
  • 1k MSRP: $2.50 to $3.50 US