ISL6420BEVAL1Z (20 Ld QFN) and the ISL6420BEVAL2Z (20 Ld QSSOP) evaluation boards are used to evaluate the ISL6420B advanced single synchronous buck PWM controller. They are configured for an output voltage of 3.3V and 10A maximum load.

The ISL6420B simplifies the implementation of a complete control and protection scheme for a high performance DC/DC buck converter. The IC can be operated with an input voltage range from 4.5V to 5.5V or 5.5V to 28V. It is designed to drive N-channel MOSFETs in a synchronous rectified buck topology. The control, output adjustment, monitoring, and protection functions are all integrated into a single package.


  • Input voltage range: 4.5V to 5.5V or 5.5V to 28V
  • 0.6V internal reference voltage: ±2.0% reference accuracy
  • Resistor-selectable switching frequency: 100kHz to 1.4MHz
  • Voltage margining and external reference tracking modes
  • Output can sink or source current
  • Lossless, programmable overcurrent protection: Uses upper MOSFET's rDS(ON)
  • Programmable soft-start
  • 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
  • Extensive circuit protection functions: PGOOD, overvoltage, overcurrent, shutdown
  • Diode emulation during startup for pre-biased load applications


  • Power supplies for microprocessors/ASICsEmbedded controllers
  • DSP and core processors
  • DDR SDRAM bus termination
  • Ethernet routers and switchers
  • High-power DC/DC regulators
  • Distributed DC/DC power architecture
  • Personal computer peripherals
  • Externally referenced buck converters

Documentation & Downloads

Title Other Languages Type Format File Size Date
User Guides & Manuals
ISL6420BEVAL1Z User Guide Manual PDF 1.09 MB