Conference Proceeding

Improving the efficiency of mixed-structure charge pumps by the multi-phase technique

07/2010; DOI:10.1109/ICIEA.2010.5516888 pp.358 - 363 In proceeding of: Industrial Electronics and Applications (ICIEA), 2010 the 5th IEEE Conference on
Source: IEEE Xplore

ABSTRACT In this paper, a new design for efficiency enhance switching-capacitor DC-DC voltage converter based on combination of traditional charge-transfer-switch charge pump and cross-coupled output stage. In order to get a high output power and pump-efficiency. By using multi-phase technique, its can increase both of pump-efficiency and power-efficiency. The propose multi-phase mixed-structure charge pump can operate at 1 MHz switching-frequency on the 0.1 μF pump-capacitors. After the simulation by using HSPICE 0.35 μm TSMC process, our work can converter the input low DC-voltage (VDD = 1.5 V) up near to 5 times of it (VOUT = 7.4688), the pump-efficiency can reaches to 99.58%, and the output power can be increased. The new proposed charge pump circuit is suitable for low-voltage applications in CMOS process because there is no threshold voltage drop in every stage even at the output stage. A great achievement has been obtained.

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Keywords

1 MHz switching-frequency
 
5 times
 
charge pump circuit
 
cross-coupled output stage
 
great achievement
 
HSPICE 0.35 μm TSMC process
 
low-voltage applications
 
new design
 
output power
 
output stage
 
propose multi-phase mixed-structure charge pump
 
switching-capacitor DC-DC voltage converter
 
traditional charge-transfer-switch charge pump
 
μF pump-capacitors