On-chip High-Voltage Generator Design

Regulated Charge Pumps: A Comparative Study by Means of Verilog-AMS

“…Therefore, each stage can be modeled with a constant on-resistance equal to R. It is worth noting, however, that the same model can be adapted to any other type of switch, such as a sub-threshold diode-connected or bootstrapped MOS transistor, etc. [10,18,22]. Each pumping capacitor of the considered CP topology has a constant value, C/ 2.…”

“…Among the converter types, inductor-based converters are mainly suitable for applications requiring power levels typically larger than hundreds of milliwatt [18][19][20]. However, inductive converters usually require external bulky inductors, as they are unsuitable for fully monolithic implementation.…”

“…On the other hand, as the main advantage of switched-capacitor converters, the full integration on a silicon substrate is allowed thanks to the high storable energy densities of the capacitive components. Thus, when the output voltage is higher than the input one (boost topology), the converters based on Charge Pump (CP) circuits are the most suited and hence are the widest adopted topologies [9,10,18]. The converters (auxiliary and primary) are implemented by using bulk, boost or bulk-boost topologies, which are made-up by energy-storage components (capacitors and/or inductors) and active devices aimed to switch the stored energy from the input source to the load during defined time slots.…”

“…On the other hand, as the main advantage of switched-capacitor converters, the full integration on a silicon substrate is allowed thanks to the high storable energy densities of the capacitive components. Thus, when the output voltage is higher than the input one (boost topology), the converters based on Charge Pump (CP) circuits are the most suited and hence are the widest adopted topologies [9,10,18].…”