應用於低功率之高效率互補式金氧半切換式穩壓器

High Efficiency CMOS Switching Regulator For Low Power Application

陳彥州(Yen-Chou Chen)

指導教授 ： 賴飛羆

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.10747

摘要

在本論文中主要設計一個高效率的脈衝頻率調變模式並有額外的電流偵測迴路控制的降壓切換式穩壓器。脈衝頻率調變模式在輕載的狀況下比脈衝寬度調變模式有著較好的效能。且在電路設計上脈衝頻率調變模式相對於脈衝寬度調變模式耗費較少的靜態電流。基於最大設計的負載電流500mA，我們只使用脈衝頻率調變模式。並在不同的負載電流變動下，使用電流感應回授的迴路來動態的微調電壓控制環形震盪器。在模擬的結果中，比較有無使用電流感應回授迴路。此設計是以台灣積體電路製造公司0.35μm 2P4M 3.3V/5V混合訊號金氧半製程來實現。其轉換效率可達到90%。工作電壓範圍為2.4V到5V。線性穩壓度0.625%/V。負載穩壓度為0.028%/mA。最大靜態電流為26μA。

關鍵字

切換式穩壓器 ； 降壓 ； 直流轉直流 ； 脈波頻率調變 ； 低功率

並列摘要

A high efficiency PFM mode buck switching regulator with additional current sensing feedback is designed in this thesis. The PFM mode switching regulator has better performance in light load than the PWM mode switching regulator. Compared with PWM mode, the PFM mode costs less quiescent current in the circuit design. We used the PFM mode only since the maximum designed load current is under 500mA for low power applications. By using the current sensing feedback loop can fine tune the voltage controlled ring oscillator dynamically under load current variation. Simulation results compare the performance of switching regulator with or without the current sensing feedback loop. This design is implemented by TSMC 2P4M 0.35μm 3.3V/5V mixed signal CMOS process. The conversion efficiency could be up to 90%. The range of the operation voltage is from 2.4V to 5V. The line regulation is 0.625%/V and the load regulation is 0.028%/mA. The maximum quiescent current is 26μA.

並列關鍵字

switching regulator ； buck ； DC-DC ； PFM ； low power

參考文獻

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