Title :
A battery-connected 24-ratio switched capacitor PMIC achieving 95.5%-efficiency
Author :
Salem, Loai G. ; Mercier, Patrick P.
Author_Institution :
Univ. of California, San Diego, La Jolla, CA, USA
Abstract :
A switched-capacitor (SC) PMIC is presented that achieves up to a 6.6-bit resolution with only 5 flying capacitors for inductive PMIC replacement. The flying capacitors are reused in a frequency-scaled gear train as well as charge-feedback SC topologies to attain a 2.4× reduction in capacitors number compared to prior art. In 0.25μm bulk, the PMIC operates from an input voltage of 2.5-5V, can generate an output voltage ranging from 0.2-2V, and features an average efficiency of 90.2% across the entire range and a peak efficiency of 95.5%.
Keywords :
CMOS integrated circuits; low-power electronics; switching convertors; battery connected switched capacitor PMIC; charge feedback switched capacitor; flying capacitor; frequency scaled gear train; inductive PMIC replacement; power management integrated circuit; voltage 0.2 V to 2 V; voltage 2.5 V to 5 V; High definition video; Very large scale integration;
Conference_Titel :
VLSI Circuits (VLSI Circuits), 2015 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-86348-502-0
DOI :
10.1109/VLSIC.2015.7231315
