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研究生:曾雄鴻
研究生(外文):Tzeng Shiung-hung
論文名稱:八安培低電壓調整器之電路設計
論文名稱(外文):8A Low Drop-Out Voltage Regulator
指導教授:劉紹宗
指導教授(外文):Liu Patrick S.
學位類別:碩士
校院名稱:逢甲大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
論文頁數:87
中文關鍵詞:低電壓低壓降負載調節線調節
外文關鍵詞:low-voltagelow drop-out voltageload regulationline regulation
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由於可攜式電子器材、如大哥大、呼叫器、膝上型電腦的盛
行,低壓降穩壓器的需求也越來越多。低壓降穩壓器通常都與直
流-直流轉換器整合在系統中應用,但也可以單獨使用。本論文
是要設計一顆具有下列功能的八安培低電壓穩壓調節器:
1.輸出電壓可調整到3V的固定電壓
2.短路時,8安培的輸出電流
3.低壓降
4.非常嚴格的負載調節和線調節
5.電流和溫度的限制
6.標準三隻腳低價TO-220封裝
本論文的製程擬申請法國AMS(Austria Mikro System
International AG),0.8微米,2層Poly,2層Metal的BiCMOS製
程。本穩壓器大致包含下列五個區塊:
1.定電流源(Constant Current Source)
2.參考電壓電路 (Voltage Reference)
3.誤差放大器 (Error Amplifier)
4.過熱保護電路 (Thermal Protection)
5.電流限制電路(Current Limiting Circuit)
穩壓器特性說明:線調節和負載調節通常穩壓器的功能可
用兩個來評比,即線調節(line regulation)和負載調節
( load regulation )。
關鍵詞:
低電壓,低壓降,負載調節,線調節

The demand for low-voltage, low drop-out (LDO) regulators is
increasing because of the growing demand for portable electronics,i.e., cellular phones, pagers, laptops, etc. LDO’s are used coherently with dc-dc converters as well as standalone parts.
The purpose of this research project is to design an 8A low drop-out voltage regulators with the following features:
1. Adjustable Output Down to 3V
2. Output Current of 8 Ampere
3. Low Drop-out Voltage
4. Extremely Tight Load and Line Regulations
5. Current and Thermal Limiting
6. Standard 3-Terminal Low Cost TO-220
This regulator will be implemented in AMS (Austria Mikro
System International AG) 0.8μm 2 poly 2 metal BiCMOS technology.
This regulator contains the following blocks:
1. Constant Current Source
2. Voltage Reference
3. Error Amplifier
4. Thermal Protection Circuit
5. Current Limiting Circuit
The line regulation and the load regulation are the two
important parameters for regulator design.
Keywords:
low-voltage, low drop-out voltage, line regulation, load regulation

第一章 緒論……………………………………………………1
1.1 研究動機………………………………………………… 1
1.2 八安培低電壓穩壓調節器電路架構…………………… 4
1.3 設計八安培低電壓穩壓調節器步驟…………………… 7
1.4 論文組織………………………………………………… 9
第二章 偏壓電流源……………………………………………11
2.1 SPICE模型…………………………………………………11
2.2 偏壓電流源簡介………………………………………… 15
2.2.1 簡介………………………………………………15
2.3 典型的電流源維勒電流源……………………………….16
2.4 偏壓電壓及電流設計結果………………………… 20
第三章 能隙參考電壓……………………………………… 22
3.1 簡介………………………………………………… 22
3.1.1 能隙參考電壓原理簡介……………………23
3.2 的溫度係數……………………………………… 25
3.3 的零溫度係數…………………………………… 28
3.4 參考電壓源不受電源變動影響電路………………30
3.5 最佳的設計結果……………………………………33
第四章 穩壓調節器電路之保護電………………………… 36
4.1 簡介………………………………………………………36
4.2 過熱保護電路工作理論…………………………………36
4.3 過熱保護電路設計結果…………………………………41
4.4 電流限制器………………………………………………42
4.4.1 前言…………………………………………… 42
4.4.2 短路保護……………………………………… 42
4.5 電流限制電路設計結果…………………………………46
4.6 電流助推電路……………………………………………48
第五章 穩壓調節器電路特性……………………………… 53
5.1 穩壓調節電路的調節動作………………………………53
5.2 穩壓調節器對輸出電壓調節結果………………………56
5.3 穩壓調節器的負載調節率………………………………57
5.3.1 穩壓調節器的線調節率……………………….62
5.4 穩壓調節器輸出功率……………………………………65
5.4.1 穩壓調節器輸出功率設計結果……………… 66
5.5 時間轉換嚮應及負載輸出動態功率……………………69
第六章 八安培低電壓穩壓調節器平面佈局………………76
第七章 結論…………………………………………………78
參考資料………………………………………………………… 80
作者簡介………………………………………………………… 85

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