Power Electronics

Zero-Voltage Switching into Point of Load Devices

Vicor Corporation introduced its new Picor PI33XX Cool-Power® ZVS buck regulator series that affords board-level designers maximum power density and flexibility for high efficiency point of load DC-DC regulation. The integration of a high performance Zero-Voltage Switching (ZVS) topology within the PI33XX series increases point of load performance, providing best in class power efficiency up to 98% peak. Products in the PI33XX series are highly integrated with control circuitry, power semiconductors and support components in a high density 10mm x 14mm x 2.56mm LGA System in Package (SiP). PI33XX buck regulators can convert input supplies ranging from 8V to 36V to output voltages from 1V to 16V and output current up to 10A for power delivery up to 120W. Power delivery can be further increased by interleaving up to six PI33XX buck regulators using single wire current sharing without the need of any additional components.

The use of a ZVS topology enables high-frequency operation that maximizes efficiency by minimizing the significant switching losses associated with conventional buck regulators that use hard-switching topologies. The high switching frequency of the PI33XX series also reduces the size of the external filtering components, improving power density while enabling fast dynamic response to line and load transients. The PI33XX series sustains high switching frequency all the way up to the rated input voltage without sacrificing efficiency and, with its 20ns minimum on-time, supports large step down conversions up to 36Vin.

PI33XX series buck regulators require only an external inductor and minimal ceramic capacitors for input and output filtering to form a complete high performance regulator. No frequency compensation, parametric settings or incremental external components are required. A wide operating temperature range of -40°C to 125°C allows for use in almost any environment.

Vicor Corp.
Part Number: PI33XX

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