This paper presents a highly efficient switched capacitor (SC) DC-DC converter, which is implemented in a 65nm low power CMOS process to enable SoC integration. The converter supplies a nominal output current of 30mA with an efficiency of 95%. The buck converter operates with a constant input voltage of 1.83V and produces an output voltage of 1.2V. The charge is transported in two phases from the input supply to the output capacitor. Therefore, a network consisting of switches and two so-called flying capacitors are used. This converter is intended to be used in power management units for mobile devices and to substitute complex and expensive inductor based DC-DC converters. A test chip was designed in collaboration with Infineon Technologies Austria AG. The measurement results are presented and give for an output current of 10mA a peak efficiency of 97%.
|Number of pages||4|
|Publication status||Published - 2011|
|Event|| The IEEE International Symposium on Circuits and Systems (ISCAS) 2011 - Rio de Janeiro, Brazil|
Duration: 15 May 2011 → 18 May 2011
|Conference||The IEEE International Symposium on Circuits and Systems (ISCAS) 2011|
|City||Rio de Janeiro|
|Period||15/05/11 → 18/05/11|
Santa, T., Auer, M., Sandner, C., & Lindholm, C. (2011). Switched Capacitor DC-DC Converter in 65nm CMOS Technology with a Peak Efficiency of 97%. 1351-1354. Paper presented at The IEEE International Symposium on Circuits and Systems (ISCAS) 2011, Rio de Janeiro, Brazil.