0.65V-input-voltage 0.6V-output-voltage 30ppm/°C low-dropout regulator with embedded voltage reference for low-power biomedical systems

Wei Chung Chen, Yi Ping Su, Yu Huei Lee, Chin-Long Wey, Ke-Horng Chen

研究成果: Conference contribution同行評審

19 引文 斯高帕斯(Scopus)

摘要

Supplying a regulated 0.6V to biomedical systems requires a low dropout (LDO) regulator with a maximum driving current capability of 10mA. One sub-1V voltage reference circuit is commonly used in the conventional LDO design to generate the reference voltage VREF with a low temperature coefficient (TC), as shown in Fig. 17.10.1. VREF is sent to the inverting terminal of the error amplifier (EA) to regulate the output voltage VOUT. The critical path of the voltage headroom exists between V REF and VIN through the inverting terminal and the tail current of the EA. That is, VIN>VSG+V OV+VREF ≈|Vtp|+2VOV+V REF, where VIN is the input supply voltage, Vtp is the threshold voltage of the p-type MOSFET and VOV is the overdrive voltage. If the minimum value of VIN is reduced to 0.65V, the derived VREF should be smaller than 50mV when |Vtp| is 0.4V and |VOV| is 0.1V. Such a sub-1V voltage reference circuit is difficult to design [1]-[4]. Even if VREF can be derived, the offset voltage in the EA will seriously affect the exact value of VREF (≤50mV). In addition, the low noise immunity is another disadvantage that severely affects the performance of the biomedical system.

原文English
主出版物標題2014 IEEE International Solid-State Circuits Conference, ISSCC 2014 - Digest of Technical Papers
發行者IEEE
頁面304-305
頁數2
57
ISBN(列印)9781479909186
DOIs
出版狀態Published - 1 1月 2014
事件2014 61st IEEE International Solid-State Circuits Conference, ISSCC 2014 - San Francisco, CA, United States
持續時間: 9 2月 201413 2月 2014

出版系列

名字Digest of Technical Papers - IEEE International Solid-State Circuits Conference
57
ISSN(列印)0193-6530

Conference

Conference2014 61st IEEE International Solid-State Circuits Conference, ISSCC 2014
國家/地區United States
城市San Francisco, CA
期間9/02/1413/02/14

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