生醫電路應用之低壓降穩壓器

Low Dropout Voltage Regulator for Biomedical Circuit Applications

王清松(Ching-Sung Wang) ； 李民慶(Min-Chin Lee) ； 陳漢儒(Han-Ru Chen)

《亞東學報》 30期 (2010/12) Pp. 1-12

https://doi.org/10.30167/JOIT.201012.0001

摘要

隨著可攜式生醫設備的蓬勃發展，為了有效使用分配有限的電池能量，電源管理系統是不可或缺的一環。低壓降穩壓器的電路架構包括誤差放大器電路、疊接式電流鏡、帶差參考電壓所組成，低壓降線性穩壓器具有架構簡單、低雜訊、低成本的優點，對於電源管理晶片系統來說，低壓降線性穩壓器是一個非常重要而且廣泛應用的單元。
本次使用TSMC 0.35um CMOS標準製程技術。在工作電壓2.3V~3.3V下，輸出電壓為1.8V，最大負載電流為120mA，模擬PSRR效能的結果為：1KHz的電源拒斥為-48.2dB、10KHz的電源拒斥為-32.4dB；3.3V下TT溫度你數為7.72ppm/℃，2.3V下TT溫度係數為6.42ppm/℃，總晶片面積為0.676×0.567平方公厘。

關鍵字

低壓降穩壓器 ； 誤差放大器電路 ； 疊接式電流鏡 ； 帶差參考電壓 ； 溫度係數

並列摘要

With the increasing demanding of portable biomedical devices, how to use the battery energy efficiently is the most concerned problem. Therefore, power management system is indispensable for modem consumer products. For power management system, Low-dropout (LDO) liner regulator is the most common block due to the characteristics, such as simplicity, small board space, low noise and cost. The proposed LDO implemented with a standard TSMC 0.35 um Mixed-Signal 2P4M Polycide 3.3/5V process technology. Supply voltage 2.3V~3.3V, Output Voltage 1.8V The simulation results show that maximum load current of 120 mA, with 2.496 mVN line regulation and 9.525 μV/mA load regulation; input range 2.3V and 3.3V, the LDO has temperature coefficient 6.42 ppm/℃ and 7.72 ppm/℃ respectively. The active area of this LDO is 676×567 μm^2.

並列關鍵字

LDO ； line regulation ； load regulation ； Temperature Coefficient

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