A 0.16mm2 Completely On-Chip Switched-Capacitor DC-DC Converter Using Digital Capacitance Modulation For LDO Replacement In 45nm CMOS

A completely on-chip switched-capacitor DC-DC converter that occupies 0.16mm2 is implemented in a 45nm CMOS process. The converter delivers 8mA output current while maintaining load voltages from 0.8 to 1V from a 1.8V input supply. A digital capacitive modulation scheme is employed to maintain the converter efficiency above 60% over a wide range of load current levels.