Fig. 1 Power management IC in portable applications
Fig. 2 Simplified block diagram of the basic DC-DC step-down converter
Fig. 3 Block diagram of the proposed step-down DC-DC converter
Fig. 4 TSD Circuit
Fig. 5 UVLO Circuit
Fig. 6 OVP Circuit
Fig. 7 Step-down DC-DC converter chip
Fig. 8 Designed 1.5V Output Step-down DC-DC converter Layout
Fig. 9 Chip measurement
Fig. 10 UVLO measurement result
Fig. 11 OVP measurement result
Fig. 12 TSD measurement result
Table 1. Parameters of 0.18-um process for 3.3V PMOS/NMOS devices
Table 2. Summary of protection circuit performance of designed 1.5V output step-down converter
참고문헌
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- Ayaz Hasan, Stefano Gregori, Imran Ahmed, Raymond Chik, "Monolithic DC-DC Boost Converter with Current- Mode Hysteretic Control", IEEE, (2011).
- Wonkeong Park, Van Ha Nguyen, Hanjung Song, "Design of a Step-Down DC-DC Converter for Mobile LED Applications", IEEE, (2013).
- 박호종, 허윤석, 박용수, 김남태, 송한정 "소형 휴대기기용 DC-DC 변환기를 위한 전압 보호회로 설계" 전자공학회논문지-IE, 49(1), 18-23, (2012).
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- 손현식, 이민지, 박원경, 송한정, "휴대기기용 LED 백라이트를 위한 감압형 DC-DC 변환기 설계" 한국산학기술학회논문지, Vol. 15, No. 3, pp. 1700-1706, (2014). https://doi.org/10.5762/KAIS.2014.15.3.1700