Fully Integrated Ultra-Low Voltage DC-DC Converter with Voltage Quadrupling LC Tank Oscillator for Energy Harvesting Applications


Jayaweera H. M. P. C., Tabrizi H. O., Muhtaroglu A.

10th International Conference on Electrical and Electronics Engineering (ELECO), Bursa, Türkiye, 30 Kasım - 02 Aralık 2017, ss.269-273 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Bursa
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.269-273
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This paper presents a novel fully integrated ultra-low voltage DC-DC converter and its multi-stage architecture. DC-DC converter frequency has been analytically derived using model analysis and validated in Cadence environment. The proposed voltage quadrupling LC tank oscillator eliminates the buffer circuits utilized in the traditional DC-DC converter, hence improves the performance metrics such as efficiency and output power capacity. The circuit was designed in 180nm standard CMOS process and was simulated to self-start and boost 70 mV to deliver 1.4 V to a 1 M Omega load. The minimum start-up voltage of the DC-DC converter is 60 mV. The optimized 2-stage DC-DC converter can yield 1.1 V output and 560 mu W load power with 43% peak efficiency at 0.2 V input. The 3-stage and 4-stage can deliver 1524 mu W and 1193 mu W load power, 1.64 V and 2.18 V output voltage with 40% and 34% peak efficiency respectively at 0.2 V input.