A step-down circuit is connected between a power supply node for supplying a supply voltage and an internal power supply line for supplying a power to the object circuit and steps-down the supply voltage, and supplies the stepped-down voltage to the object circuit through the internal power supply line....http://www.google.fr/patents/US7839205?utm_source=gb-gplus-shareBrevet US7839205 - Step-down circuit, semiconductor device, and step-down circuit controlling method
Step-down circuit, semiconductor device, and step-down circuit controlling ...