臺灣博碩士論文加值系統

本論文的內容是要設計一個具有直流電壓轉直流電壓的降壓切換式穩壓器，它具有很高的轉換效率，以實現延長電源儲存媒體的使用時間。
本論文中所提出的切換式穩壓器，會依據不同大小的負載電流而有兩種操作的模式，而其最主要的原理乃是根據回授的機制來達成將輸出電壓固定在一個所預期的數值而不會受到負載的差異影響來造成改變，這兩種的操作模式分別為脈衝寬度調變和脈衝頻率調變，當上述的這兩種模式被適當的切換時，則轉換效率可以高達百分之九十以上，所以它非常適合用於可攜帶式電子產品，如手機等、、，而論文內的能隙參考電壓源可以產生零點九伏特的參考電壓，因此可以增加輸出電壓的可變範圍。
此切換式穩壓器內包含了數個非同步比較器、錯誤放大器、時脈產生電路、斜率補償電路、能隙參考電壓源以及數位邏輯電路，此晶片是以聯華電子公司點八微米互補式金氧半製程來實現，而工作電壓的範圍為三點三至五伏特，其負載穩壓度和線穩壓度分別為0.005 %/mA和1.75 %/V，而其它的量測結果也包含在本論文內。

Contents
Abstract (Chinese)…………………………………………………i
Abstract (English)…………………………………………………ii
Acknowledgement………………………………………………...iii
Contents…………………………………………………………...iv
Figure Captions…………………………………………………...vi
Table Captions…………………………………………………….ix
Chapter 1 Introduction
1.1 Background and Review 1
1.2 Motivation 5
1.3 Thesis Organization 6
Chapter 2 Review on Definitions and Operational Principle of Switching Regulators
2.1 Specifications 7
2.1.1 Efficiency 7
2.1.2 Load Regulation 8
2.1.3 Line Regulation 8
2.1.4 Transient Response 9
2.2 Continuous and Discontinuous Mode 11
2.3 Feedback-Loop Stabilization 13
Chapter 3 Architecture
3.1 System Structure 22
3.2 Current Mode Pulse Width Modulation (PWM) Operation 24
3.3 Pulse Frequency Modulation (PFM) Operation 28
3.4 PWM & PFM Mode Detection 29
Chapter 4 Design and Analysis of the Circuits
4.1 Bandgap Voltage Reference 32
4.2 Switched Bias Circuit 35
4.4 Clock Generation Circuit 41
4.6 Error Amplifier Circuit 44
4.7 Slope Compensation Circuit 47
4.8 Lateral Power MOSFET 49
4.9 Driver Circuit 52
4.10 HSPICE Post-simulation Results of the Chip 53
Chapter 5 Experiment Results
5.1 Layout Consideration 57
5.2 Testing System Setup 58
5.3 Measurement Results 61
Chapter 6 Conclusions and Future Work
6.1 Conclusions 70
6.2 Future Work 71
References 72

References
[1] M. Horowitz, T. Indermaur and R. Gonzafez, “Low-Power Digital Design,’’ IEEE symposium on Low Power Electronics, 1994, pp. 8-11.
[2] H. W. Whittington, B. W. Flynn and D.E. Macpherson, “Switched Mode Power Supplies: Design and Construction,’’ John Wiley & Sons, 1992.
[3] Robert W. Erickson, “DC-DC Power Converters,” article in Wiley Encyclopedia of Electrical and Electronics Engineering.
[4] Lu Chen, Bingxue Shi and Chun Lu, “Design and Test of a Synchronous PWM Switching Regulator System,” IEEE APCCAS, 2000, pp. 517 -520.
[5] Yim-Shu Lee, “Computer-Aided Analysis and Design of Switch-Mode Power Supplies,” Marcel Dekker Inc., 1993.
[6] Pressman, Abraham I., “switching power supply,” McGraw-Hill, 1992.
[7] Marty Brown, “Power Supply Cookbook,” Butterworth-Heinemann, 1994.
[8] “MAX1692: Low-Noise, 5.5V Input, PWM Step-Down Regulator,” MAXIM Integrated Products Inc., Dec. 1998.
[9] “TPS62000: High-Efficiency Step-down Low Power DC-DC Converter,” Texas Instrument Inc., Jun. 2002.
[10] “SP6650: High Efficiency 600mA Synchronous Buck Regulator,” Sipex Inc., Feb. 2002.
[11] “LTC3411: 1.25A, 4MHz, Synchronous Step-down DC/DC Converter,” Linear Technology Inc., Apr. 2002.
[12] J.J. Locascio, and W. Cho, “New ICs and control techniques for battery powered systems,” WESCON/'93. Conference Record, pp.388 -395, Sep 1993.
[13] Ka Nang Leung and Mok, P.K.T.,” A Sub-1-V 15-ppm/∘C CMOS Bandgap Voltage Reference Without Requiring Low Threshold Voltage Device,” IEEE J. Solid-State Circuits, pp.526 -530, Apr 2002.
[14] David A.Johns and Ken Martin, “Analog Integrated Circuit Design,” John Wiley & Sons, 1997.
[15] H. Banba, H. Shiga, A. Umezawa. T. Miyaba, T. Tanzawa, S. Atsumi and K. Sakui, “ A CMOS bandgap reference circuit with sub-1-V operation,” IEEE J. Solid-State Circuits, vol.34, pp.670-674, May 1999.
[16] H. Neuteboom, B. M. J. Kup, and M. Janssens, “A DSP-based hearing instrument IC,” IEEE J. Solid-State Circuits, vol.32, pp.1790-1806, Nov. 1997.
[17] K. M. Tham and K.Nagaraj, “A low supply voltage high PSRR voltage reference in CMOS process,” IEEE J. Solid-State Circuits, vol.30, pp.586-590, May 1995.
[18] D. J. Allstot, “A Precision Variable-Supply CMOS Comparator,” IEEE J. Solid-State Circuits, Vol.SC-17, no.6, pp.1080-1087, Dec. 1982.
[19] M. Bazes, “Two Novel Full Complementary Self-Biased CMOS Differential Amplifiers,” IEEE J. Solid-State Circuit, vol.26, no.2, pp.165-168, Feb. 1991.
[20] Marshall, A. and Devore, J., “Dual switch-mode regulator IC,” Dig. Tech. Papers ISSCC, 1995, pp.52 -53.
[21] M. Darwish, J. Huang, M. Liu, M.S. Shekar, and R. Williams, “Scaling issues in lateral power MOSFETs,” Power Semiconductor Devices and ICs, 1998, pp.329-33