The ISL8115DEMO1Z is a compact reference design synchronous buck converter (28.19mm x 16.89mm) for implementing Renesas' ISL8115 wide input range PWM controller. Utilizing voltage mode control with input feed-forward, the ISL8115DEMO1Z maintains a constant loop gain for optimal transient response, especially for applications with a wide input voltage range.


  • Small, compact design
  • Fast transient response
    • Voltage-mode PWM leading-edge modulation with nonlinear control
    • Input voltage feed-forward
  • Integrated 5V high-speed 4A MOSFET gate drivers
    • Internal bootstrap diode
  • Oscillator programmable from 150kHz to 1.5MHz
    • Frequency synchronization to external clock signal
  • Diode emulation mode for light load efficiency improvement
  • Output OVP/UVP; OCP and OTP
  • Adjustable soft-start
  • Prebias start-up function
  • Excellent output voltage regulation
    • 0.6V ±1.0% internal reference (-40 °C ~ +125 °C)
    • 0.6V ±0.7% internal reference (-40 °C ~ +105 °C)
    • Differential voltage sensing


  • Power supplies for datacom/telecom and point-of-load (POL)
  • Wide input voltage range buck regulators
  • High current density power supplies RF power amplifier bias compensation

Documentation & Downloads

Title Other Languages Type Format File Size Date
User Guides & Manuals
ISL8115DEMO1Z User Guide Manual PDF 1.43 MB
ISL8115DEMO1Z Design Files Design File ZIP 762 KB