Vicor – PI3543-00-LGIZ: Cool-Power ZVS Buck Regulator and LED Driver

The PI354x-00 is a family of high input voltage, wide input range DC-DC ZVS buck regulators integrating controller, power switches, and support components all within a high density system-in-package (SiP). The PI354x-00 products are designed to operate within an SELV compliant system with steady state operation limited to 60V. The PI354x-00 products allow for transient voltage conditions up to 70V before shutdown is triggered. The integration of a high-performance zero-voltage switching (ZVS) topology,  within the PI354x-00 series, increases point of load performance providing best in class power efciency. The PI354x-00 requires only an external inductor, two voltage selection resistors and minimal capacitors to form a  complete DC-DC switching mode buck regulator.


  • High efficiency HV ZVS buck topology
  • Constant voltage or constant current operation
  • Power-up into pre-biased load
  • Two phase interleaving
  • Output over-voltage protection and over-temperature protection
  • -40°C to +125°C operating range (TJ)
  • 36V to 60V input voltage range with transient events up to 70VIN
  • Constant current error amplifier and reference
  • Parallel capable up to 3 regulators
  • Input over/under-voltage lockout (OVLO/UVLO)
  • User adjustable soft start and tracking