The ISL8118EVAL1Z evaluation board highlights the operations of the ISL8118 pulse width modulation (PWM) controller in a DC/DC application.

The ISL8118 is a single-phase PWM controller for a synchronous buck converter with an integrated MOSFET driver that operates from +3.3V to +20V bias supply voltage. Utilizing voltage-mode operation with input voltage feed-forward compensation, the ISL8118 maintains a constant loop gain, providing optimal transient response for applications with a wide input operating voltage range

The controller features the ability to safely start-up into prebiased output loads and provides protection against overcurrent fault events. Overcurrent protection is implemented using both top-side and bottom-side MOSFET rDS(ON) sensing, eliminating the need for a current sensing resistor. Dual sensing allows the ISL8118 to detect overcurrent faults at the very low and very high duty cycles that can result from the ISL8118's wide input range.

Features

  • DC/DC, step down
  • Optimal input voltage: 9.6V to 14.4V
  • Output voltage: 1.8V
  • Typical output voltage ripple: 30mV
  • Continuous load current (max): 25A
  • Switching frequency: 300kHz
  • Lead free/RoHS compliant

Applications

  • Telecom/Datacom servers
  • Point-of-load (POL) modules
  • Routers and switchers

Documentation & Downloads

Title Other Languages Type Format File Size Date
User Guides & Manuals
ISL8118EVAL1Z User Guide Manual PDF 892 KB