Title :
A low-ripple switched-capacitor DC-DC up converter for low-voltage applications
Author :
Lee, Seung-Chul ; Park, Dong-Soo ; Jung-Hee Song ; Choi, Myung-Whan ; Lee, Seung-Hoon
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejon, South Korea
Abstract :
This paper describes a switched-capacitor type DC-DC up converter with high efficiency and low-ripple output. Identical charge pumps operating sequentially in the proposed DC-DC converter reduce the magnitude of output voltage ripples to 20% of the conventional converters. A new charge pump adopting PMOS switches near the output stage improves the power efficiency of the DC-DC converter by 10%. The proposed DC-DC converter is applied, as a test vehicle, to a phase-locked loop circuit which is sensitive to power supply noise. All circuits are simulated and fabricated in a 0.65-μm CMOS process
Keywords :
CMOS analogue integrated circuits; convertors; phase locked loops; power supply circuits; switched capacitor networks; 0.65 micron; CMOS process; DC-DC converter; PLL circuit application; PMOS switches; charge pumps; high efficiency; low-ripple DC-DC up converter; low-voltage applications; phase-locked loop circuit; power efficiency; switched-capacitor DC-DC up converter; Charge pumps; Circuit noise; Circuit testing; DC-DC power converters; Phase locked loops; Power supplies; Switches; Switching converters; Vehicles; Voltage;
Conference_Titel :
ASICs, 2000. AP-ASIC 2000. Proceedings of the Second IEEE Asia Pacific Conference on
Conference_Location :
Cheju
Print_ISBN :
0-7803-6470-8
DOI :
10.1109/APASIC.2000.896896
