20#x03BC;A to 100mA DC-DC converter with 2.8 to 4.2V battery supply for portable applications in 45nm CMOS

摘要

Digital baseband processors [1] in portable devices today are able to operate off voltages of 1V and less. Efficient DC-DC converters are required to power these ICs from Li-ion batteries with a voltage range of 2.8 to 4.2V. This is done by a discrete power management IC (PMIC) capable of handling the high battery voltage. However, there is significant push in integrating the PMIC module with the baseband processor implemented in scaled technologies thereby reducing the number of system-level components. This paper presents the circuit techniques used in a 45nm CMOS DC-DC converter with high battery-voltage handling capability.