Patent ID: 8044641
Filing Date: 2011-10-25
Classification: H02M

Abstract:
1. A synchronous-rectification-type step-down switching regulator for converting an input voltage at an input terminal of the switching regulator into a predetermined constant voltage that is applied to a load connected at an output terminal of the switching regulator, the switching regulator comprising: a first switching element configured to perform a switching in accordance with a control signal; an inductor that is charged by the input voltage when the first switching element performs the switching; a second switching element for synchronous rectification configured to discharge the inductor by performing a switching in accordance with the control signal; a control circuit unit configured to control the switching of the first switching element in order to obtain the predetermined constant voltage at the output terminal, the control circuit also being configured to cause the second switching element to perform the switching in an opposite manner to the switching of the first switching element; and a short-circuiting unit configured to connect the output terminal to a ground voltage and also short-circuit the second switching element when the control circuit unit is deactivated.