Intersil – ISL8117: Innovative 60V Synchronous Buck Controller Simplifies Power Supply Design

The ISL8117 is a synchronous buck controller to generate POL voltage rails and bias voltage rails for a wide variety of applications. The controller’s low duty cycle (40ns minimum on time) enables the direct step down conversion from 48V to a 1V point-of-load. The ISL8117 uses the valley current modulation technique to bring hassle-free power supply design with minimal number of components and complete protection from unwanted events. It offers programmable soft start and enable functions along with a power-good indicator for ease of supply rail sequencing and other housekeeping requirements.


  • 4.5V to 60V input voltage range
  • 0.6V to 54V output voltage range
  • 100kHz to 2MHz programmable frequency
  • Forced PWM
  • No external current sense resistor
  • Overcurrent, over-voltage, over-temperature, under-voltage protections
  • Light-load efficiency enhancement
  • External sync and PGOOD indicator
  • Programmable soft start
  • Adaptive shoot-through protection
  • 4 x 4mm QFN and 6.4 x 5mm HTSSOP packages
  • 1k MSRP: $1.80 to $1.95 US