Patent ID: 9030176
Filing Date: 2015-05-12
Classification: G05F,G06F,H01L,H02M,H03K

Abstract:
1. A semiconductor integrated circuit comprising: an output terminal to which a load circuit that consumes a load current is coupled, and from which an output voltage is generated; a plurality of output transistors each having one terminal coupled to a power supply terminal and an other terminal coupled to the output terminal, said each output transistor controlling a magnitude of the output voltage corresponding to a magnitude of the load current according to a control value indicated by an impedance control signal supplied to a control terminal thereof; a voltage monitor circuit which monitors the output voltage and outputs an output voltage monitor value indicative of a voltage value of the output voltage; and a control circuit which controls a magnitude of the control value according to a magnitude of an error value between a reference voltage indicative of a target value of the output voltage and the output voltage monitor value and controls based on the control value whether any of the output transistors is brought into a conducting state, wherein the control circuit increases a change step of the control value relative to the error value during a predetermined period according to prenotification signals for notifying a change of the load current in advance.