Switching regulator incorporating operation monitor

摘要

A switching regulator includes a first switching element and a second switching element in a pair to be switched over to convert an input voltage to a certain constant voltage, and an operation monitor to monitor an operation state of the first switching element, in which a switching of the second switching element is changed according to a result of the monitoring by the operation monitor.

主权项

1. A switching regulator comprising:
a first switching element and a second switching element in a pair to be switched over to convert an input voltage to a certain constant voltage; and an operation monitor to monitor an operation state of the first switching element, wherein a switching of the second switching element is changed according to a result of the monitoring by the operation monitor, wherein the operation monitor is an on-time judgment circuit to judge whether or not an ON time of the first switching element has reached a preset judgment time and to change high and low of an output signal, wherein if the on-time judgment circuit judges that the ON time of the first switching element has reached the preset judgment time, the second switching element is not turned on after the first switching element is turned off, and wherein if the on-time judgment circuit judges that the ON time of the first switching element has not reached the preset judgment time, the second switching element is turned on after the first switching element is turned off.