12V, 24V, and 48V Buck-Boost and Buck Regulators Vicor Cool Power® ZVS Buck-Boost Regulators combine high-efficiency ZVS topology with high-density system-in-package (SiP) design to offer high performance with ease of design. Cool Power regulators integrate the switching controller, power switches, and all active components. These regulators are capable of delivering over 98% efficiency at >,800kHz FSW, fast transient response, and are parallel-capable with single-wire current sharing.