This paper proposed a bootstrapped type high-efficient charge pump circuit based on the Dickson charge pump for high output power and pump-efficiency. By using bootstrapped technique, it can increase both of pump-efficiency and power-efficiency. The proposed bootstrapped based charge pump can avoid the threshold voltage drop and enable to generate a higher output voltage. Simulation by using HSPICE level 3 model shows that for conventional Dickson charge pump, it convert the input low DC-voltage (Vin=1.5V) up to 3.8 times of it (VOUT=5.77V), the pump efficiency was 76.93%. Our work, however, can convert the low input DC-voltage (Vin=1.5V) up near to 4.4 times of it (VOUT=6.62V), pump efficiency can reach up to 88.26%.

This paper proposes a new addressing method for high-efficiency switching-capacitor DC-DC voltage converter based on combination of CTS (charge-transfer-switch) charge pump and cross-coupled output stage is proposed in order to get a high output power and pump-efficiency. By using three level addressing methods, it can increase both of pump-efficiency and power-efficiency. The proposed three level addressing mixed-structure charge pump can operate at as high as 1MHz switching-frequency on the 0.1 μF pump-capacitors. Simulation by using HSPICE level 3 model shows that our work can convert the input low DC-voltage (Vin=1.5V) up near to 11.26 times of it (VOUT=16.9V), so that more output power can be generated with a little power loss. The newly proposed addressing method for DC-DC charge pump circuit is suitable for various low-voltage applications.

This paper proposed an improved bootstrapped type high-efficient charge pump circuit based on the Dickson charge pump in order to get a higher pumping efficiency. It is not only avoid the threshold voltage drop in conventional Dickson charge pump circuits but enable them to generate a higher output voltage. Simulation by HSPICE shows that for conventional Dickson charge pump, it convert the input low DC-voltage (Vin=1.5V) up to 3.8 times of it (VOUT=5.77V), the pump efficiency was 76.93%. Our work, however, can convert the low input DC-voltage (Vin=1.5V) up near to 4.76 times of it (VOUT=7.14V), the pump efficiency can reaches as high as 95.2%.