First line: ACT4070YH-T ACT4070YH* ACT4070YH ACT4070 12/2006 Wide Input Step Down Converter FEATURESAbstract: .. ACT4070YH-T -40 °C to 85 °C SOP-8/EP 8 TAPE & REEL. PIN CONFIGURATION. PIN DESCRIPTION. PIN NUMBER PIN NAME PIN DESCRIPTION. 1 BS. Bootstrap. This pin acts as the positive rail for the high-side switch .. Tags: ACT4070YH-TECJ-3YB1C226M*ACT4070YH*act4070ACT4070