Synchronous Buck PWM Controller Evaluation Board


The ISL8104EVAL1Z evaluation board highlights the operations of the ISL8104 controller in a DC/DC application. The ISL8104 is a simple single-phase PWM controller for a synchronous buck converter with integrated MOSFET driver that operates from +8V to +14.4V bias supply voltage. The ISL8104 employs voltage-mode control with dual-edge modulation to achieve fast transient response. 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 topside MOSFET rDS(ON) sensing, eliminating the need for a current sensing resistor.

Key Features

  • +8V ±5% to +14V ±10% Bias Voltage Range
    • 1.5V to 15.4V Input Voltage Range
  • 0.597V Internal Reference Voltage
    • ±1.0% Over the Commercial Temperature Range
    • ±1.5% Over the Industrial Temperature Range
  • Voltage-Mode PWM Control with Dual-Edge Modulation
  • 14V High Speed N-Channel MOSFET Gate Drivers
    • 2.0A Source/3A Sink at 14V Bottom-Side Gate Drive
    • 1.25A Source/2A Sink at 14V Top-Side Gate Drive
  • Fast Transient Response
    • 15MHz (typ) Gain-Bandwidth Error Amplifier with 6V/µs slew rate
    • Full 0% to 100% Duty Cycle Support
  • Programmable Operating Frequency from 50kHz to 1.5MHz
  • Lossless Programmable Overcurrent Protection
    • Top-Side MOSFET's rDS(ON) Sensing
    • ~120ns Blanking Time
  • Sourcing and Sinking Current Capability
  • Support for Start-Up into Prebiased Loads


  • Test and Measurement Instruments
  • Distributed DC/DC Power Architecture
  • Industrial Applications
  • Telecom/Datacom Applications

ISL8104EVAL1Z PWM Controller Eval Board

ISL8104EVAL1Z PWM Controller Eval Board


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