Wide Input Range Dual PWM Controller with DDR Option Evaluation Boards


The ISL6539EVAL1 and ISL6539EVAL2 evaluation boards are used to evaluate the ISL6539 wide input range, dual pulse width modulation (PWM) controller with DDR option. The evaluation board supports testing with laboratory power supplies. Both regulated outputs can be exercised through external loads. There are posts available on the two regulated output rails for drawing a load and/or monitoring the voltages.

The ISL6539EVAL2 has two LEDs which indicate the status of the individual channel power-good (PGOOD) signals. There are also four scope probe points that allow for in-depth analysis. Four jumpers have also been provided for control and monitoring purposes.

The ISL6539EVAL1 has an LED which indicates the status of the PGOOD signal. There are also three scope probe points that allow for in-depth analysis and two posts available to monitor the enable signals for either channel. Four jumpers have also been provided for control and monitoring purposes.


  • Provides regulated output voltage in the range of 0.9V to 5.5V
  • Complete DDR memory power solution with VTT tracks VDDQ/2 and VDDQ/2 buffered reference output
  • Supports both DDR-I and DDR2 memory
  • Lossless rDS(ON) current sense sensing
  • Excellent dynamic response with voltage feed-forward and current mode control accommodating wide range LC filter selections
  • Dual mode operation - Operates directly from a 5.0V to 15V input or 3.3V/5V system rail
  • Undervoltage lock-out on VCC pin
  • Power-good, overcurrent, overvoltage, undervoltage protection for both channels
  • Synchronized 300kHz PWM operation in PWM mode


  • Single and dual channel DDR memory power systems
  • Graphics cards - GPU and memory supplies
  • Supplies for servers, motherboards, FPGAs
  • ASIC power supplies
  • Embedded processor and I/O supplies
  • DSP supplies

ISL6539EVAL2 PWM Controller with DDR Option Eval Board

ISL6539EVAL2 Evaluation Board





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Disclaimer: THIS MATERIAL IS PROVIDED “AS-IS” FOR EVALUATION PURPOSES ONLY. RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (collectively, “Renesas”) DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY. Renesas provides evaluation platforms and design proposals to help our customers to develop products. However, factors beyond Renesas' control, including without limitation, component variations, temperature changes and PCB layout, could significantly affect the product performance. It is the user’s responsibility to verify the actual circuit performance.