Patent ID: 7315194
Filing Date: 2008-01-01
Classification: H02M

Abstract:
1. A booster circuit comprising: a first booster unit having a first output terminal from which a boosted voltage is output and that is connected to an external output terminal, a second booster unit having a second output terminal from which a boosted voltage is output and that is connected to the external output terminal, and a control circuit outputting a first control signal and a second control signal, the first control signal taking one of an on-specifying state for turning on the first booster unit and an off-specifying state for turning off the first booster unit based on a first value of an internal signal used as a threshold, the internal signal being related to the output voltage, the second control signal taking one of an on-specifying state for turning on the second booster unit and an off-specifying state for turning off the second booster unit based on a second value of the internal signal used as a threshold, the second value being lower than the first value.