Vicor – PI3749: 16V to 34VIN, 12V to 34VOUT, Cool-Power ZVS Buck-Boost Regulator

The PI3749-00 is high efficiency DC-DC zero voltage switching (ZVS) buck-boost regulator that operates from 16VIN to 34VIN, regulates an output voltage from 12V to 34V and provides output current up to 11.5A for power delivery over 200W. This high density system-in-package (SiP) integrates controller, power switches, and support components. The integrated high performance zero voltage switching topology within the PI3749-00 increases point-of-load performance and provides best in class power efficiency. The PI3749-00 requires an external inductor, resistive feedback divider and minimal capacitors to form a complete DC-DC switching mode buck-boost regulator.


  • Up to 98.5% efficiency at 800kHz FSW
  • Fast transient response
  • External frequency synchronization/interleaving
  • Input over-/under-voltage lockout (OVLO/UVLO)
  • Over-temperature protection (OTP)
  • Fast and slow current limits
  • Over 200W of continuous output power
  • Parallel capable with single wire current sharing
  • High side current sense amplifier
  • Output over-voltage protection (OVP)
  • -40°C to +115°C operating temperature range (TJ)
  • 1k MSRP: $14.50 US