A DC-DC Converter For Portable Applications In 45nm CMOS

The DC-DC converter is designed in a 45nm digital CMOS process and is capable of handling 2.8 to 4.2V battery. The main converter is a buck regulator with efficiency of 75% to 87% over a wide load range (10µA to 100mA). It utilizes switched capacitor converters for internal rail generation and has a IC-DAC DPWM.