The ISL6520EVAL1 evaluation board highlights the operation of the ISL6520A synchronous buck PWM controller in an embedded application.

The evaluation board is populated with the ISL6520A controller IC and is flexible enough to allow for reference designs with 5A, 10A and 15A output currents at a fixed output voltage of 3.3V. A simple resistor change allows the output to go as low as 0.8V to as high as the input voltage. This flexibility allows a power supply designer to easily modify an existing design to suit almost any relevant application. The ISL6520EVAL1 DC/DC converter demo boards are customized to provide up to 15A of current at a fixed output voltage.

Designed to drive N-channel MOSFETs in a synchronous buck topology, the ISL6520A integrates the control, output adjustment, monitoring, and protection functions into a single 8-Lead package. The ISL6520A provides simple, single feedback loop, voltage-mode control with fast transient response. The output voltage can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1.5% over-temperature and line voltage variations. A fixed frequency oscillator reduces design complexity, while balancing typical application cost and efficiency.


  • Operates from +5V input
  • 0.8V to VIN output range
    • 0.8V internal reference
    • ±1.5% over line voltage and temperature
  • Drives N-channel MOSFETs
  • Simple single-loop control design
    • Voltage-mode PWM control
  • Fast transient response
    • High-bandwidth error amplifier
    • Full 0% to 100% duty cycle
  • Lossless, programmable overcurrent protection
    • Uses upper MOSFETs rDS(ON)
  • Small converter size
    • 300kHz fixed frequency oscillator
    • Internal soft-start
    • 8-Ld SOIC or 16-Ld 4mm x 4mm QFN
  • Pb-Free (RoHS Compliant)


  • Power supplies for microprocessorsPCs
  • Embedded controllers
  • Subsystem power suppliesPCI/AGP/GTL+ buses
  • ACPI power control
  • SSTL-2 and DDR SDRAM bus termination supply
  • Cable modems, set-top boxes and DSL modems
  • DSP and core communications processor supplies
  • Memory supplies
  • Personal computer peripherals
  • Industrial power supplies
  • 5V-input DC/DC regulators
  • Low-voltage distributed power supplies

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL6520A Datasheet Datasheet PDF 665 KB
User Guides & Manuals
ISL6520EVAL1 User Guide Manual PDF 609 KB
Application Notes & White Papers
AN1243: Getting Started with iSim and iSim:PE Application Note PDF 436 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
ISL8117EVAL1Z Design Files Design File ZIP 933 KB
ISL8130EV1Z Design Files Design File ZIP 135 KB
ISL8117EVAL2Z Design Files Design File ZIP 655 KB
ISL8117DEMO2Z Design Files Design File ZIP 511 KB
ISL8117DEMO1Z Design Files Design File ZIP 724 KB
ISL8115EVAL2Z Design Files Design File ZIP 934 KB
ISL8115EVAL1Z Design Files Design File ZIP 967 KB
ISL8115DEMO1Z Design Files Design File ZIP 762 KB
ISL8104EVAL1Z Design Files Design File ZIP 209 KB
ISL78268EVAL1Z Design Files Design File ZIP 1.10 MB
TB417: Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators Other PDF 562 KB