Modular architecture for ultra low power switched-capacitor DC-DC converters
Resumen:
This work presents a novel modular architecture for a step-down Switched-Capacitor Converter for Ultra Low Power applications. The modularity of the architecture allows to generate any conversion ratio in the same way. Additionally a technique for increasing efficiency by recycling the charge stored in parasitic capacitances is presented, which reduced the losses due to this cause in 80%. An example of converter with four conversion ratios for a supply voltage of 2.8V, load current up to 100μA in a 0.5μm CMOS process was designed and electrically simulated. The efficiency achieved for the 4/5 conversion ratio is above 77% for one order of magnitude of the load current.
| 2012 | |
| Electrónica | |
| Inglés | |
| Universidad de la República | |
| COLIBRI | |
| https://hdl.handle.net/20.500.12008/41139 | |
| Acceso abierto | |
| Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0) |
| Sumario: | This work presents a novel modular architecture for a step-down Switched-Capacitor Converter for Ultra Low Power applications. The modularity of the architecture allows to generate any conversion ratio in the same way. Additionally a technique for increasing efficiency by recycling the charge stored in parasitic capacitances is presented, which reduced the losses due to this cause in 80%. An example of converter with four conversion ratios for a supply voltage of 2.8V, load current up to 100μA in a 0.5μm CMOS process was designed and electrically simulated. The efficiency achieved for the 4/5 conversion ratio is above 77% for one order of magnitude of the load current. |
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