汽車與工業應用之寬輸入電壓線性穩壓器 (LDO) RT9068

1rem

rt-dark-800

headline-3

false

Application Note Name

false

basicInfoTitle

rt-dark-300

applicationNoteInfo

left

buttonDownload

text-with-icon

secondary

i18n(button-item.download.button-label)

i18n(button-item.download.button-link)

_self

false

btnAllApplicationNote

text-with-icon

secondary

i18n(button-item.all-application-note.button-label)

i18n(button-item.all-application-note.button-link)

_self

false

width

fixed-width

basicInfoSection

withLine

2rem

width

full-width

<div class="WordSection1"> <h1>汽車與工業應用之寬輸入電壓線性穩壓器 (LDO) RT9068</h1> <h2 id="__Bookmark__0">摘要</h2> 立錡科技提供了寬輸入電壓範圍的線性穩壓器和 DC/ DC 轉換器產品，以滿足工業、汽車與電信應用所需之高性能電源系統的需求。由於這些應用所處的環境變異較大，如汽車應用在高電壓源（12V 或 42V）上會有大電壓的瞬變，而電信應用的電源通常是 48V，但瞬間可能會到 72V等，都為其電源管理的設計帶來艱難的挑戰。這些應用的電源電路之輸入電源常是高電壓，很多時候卻須維持僅消耗數毫安 (mA) 之低功率監測狀態。立錡科技之寬輸入電壓線性穩壓器的工作電壓高達 60V，是一個非常理想的解決方案；且其輸入端不需加保護元件，使設計更加穩健耐用，能提昇系統可靠性，並可降低系統之成本和尺寸。以下將會介紹立錡之寬輸入電壓 (Vin) LDO的特殊性能，如輸出不易受輸入瞬態變化的影響、不需兩級轉換就能達到高效率、且有好的 PSRR 之低噪音性能等。 <h2 id="__Bookmark__1">立錡科技寬輸入電壓 LDO 之簡介</h2> RT9068 是一個適用於高電壓之低壓差線性穩壓器，並採用散熱增強型SOP-8封裝；輸入電壓範圍為 4.5V至60V，輸出電流可高達 50mA。在50mA的輸出電流時，RT9068 的最大壓差僅為 230mV。一般操作時，SHDN 接腳是在低電位 (LOW)，RT9068的靜態電流僅為 30μA。SHDN 接腳拉至高電位 (HIGH) 時 (甚至會到60V)，則會進入低功耗的關閉狀態，此時的靜態電流可低至僅 2μA。RT9068提供四種不同輸出電壓的版本，有可調整輸出電壓及固定輸出電壓 2.5V、3.3V 和 5V 等。 此外，只需分別在輸入和輸出端的外部加上至少 1μF的旁路電容，即可確保系統穩定。且可使用低 ESR 的小型陶瓷電容，而不用像某些穩壓器仍需串聯額外的電阻。 <h2 id="__Bookmark__2">汽車應用</h2> 為了管理汽車中複雜的電子系統，汽車的微控制器 (MCU) 常內含一或多個處理器及數個下列的模組：如 SRAM，快閃記憶體 (Flash)，振盪器，PLL，AD轉換器，I / O（CAN，LIN，以太網，USB等）和電源管理。在汽車應用中，新系統的電源電壓將從原本的12V 變為 42V，但兩者都可能會有超過60V的瞬態變化；所以，有彈性與簡單的電路板設計可降低其開發成本和風險。在汽車的 MCU中，會有一個內部穩壓器，以提供 IP 模組所需穩定的 3.3V 電源。因為功耗的限制，內部穩壓器只能提供最大約 50mA 的電流，足以供應快閃記憶體，振盪器和 PLL 等。汽車應用中可能會有從 25V 至 60V 的高瞬態尖峰脈衝電壓，而 RT9068 系列的最大輸入電壓有 60V，故非常適合車用。 RT9068 可直接接電池電源，可避免輸入電源的瞬態變化損壞內部穩壓器或是負載。而即使電池反接，RT9068也可以防止反向電流損壞敏感的負載電路。RT9068 系列的電路簡單、成本較低，很適合用於抑制輸入的尖峰脈衝。 <a class="fancybox" href="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image001_zh-tw.png"> <img id="圖片 1" alt="Technical Document Image Preview" height="317" src="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image001_zh-tw.png" width="529"></a> 圖一、有負載突降瞬變之汽車應用的微控制器電源程序 在許多現代汽車的子系統中，微控制器常是一個常通的電路。而所有常通的電路所消耗的總電流必須低於數毫安 (mA)。如果有不需要的子系統時，可讓 RT9068進入關閉 (SHDN) 狀態，更加省電。 <h2 id="__Bookmark__3">多節電池組</h2> 在工業應用中，由多節電池串聯在一起的電池組可能會有高達 55V 的瞬態電壓。這些電池組的內部有電路來防止會損壞微控制器的過流 (overcurrent) 和過壓 (overvoltage) 的情況發生；而同時，微控制器會持續地監測電池本身。但因此種方式無法均衡電池，所以會降低電池壽命。最好的微控制器供電方式是先將多節電池組的電壓降低，並使每個電池平均放電。RT9068 因有高輸入電壓，及極低的靜態電流能延長電池使用時間，所以是一個非常適合此應用的穩壓器。 <a class="fancybox" href="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image002_zh-tw.png"> <img id="圖片 3" alt="Technical Document Image Preview" height="179" src="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image002_zh-tw.png" width="467"></a> 圖二、由多節電池組供電微控制器 <h2 id="__Bookmark__4">馬達驅動之電動工具</h2> 在如馬達等高功率的應用中，會有一 MCU 來控制由電池供電的馬達。MCU 需要一個低電壓電源，所以必須將多節電池組的高電壓轉換成低電壓，以供 MCU 之用。除此之外，也必須保護此 MCU 不受馬達電感產生之高電壓瞬變的影響。因 RT9068 有低靜態電流、高輸入電壓及具低系統成本，所以非常適合作為控制馬達之 MCU的電源。 <a class="fancybox" href="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image003_zh-tw.png"> <img id="圖片 5" alt="Technical Document Image Preview" height="250" src="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image003_zh-tw.png" width="456"></a> 圖三、由MCU控制之馬達所驅動的電動工具 <h2 id="__Bookmark__5">電信應用</h2> 在電信應用中，作為監測用之維生電路的電源是48V；其靜態電流規格非常重要，尤其是當輸入端發生故障，備用電池開始運作以保持輸出有效時。在電信應用中，輸入電源是48V，但有時會有高達 72V 的瞬態電壓。在工業應用中，很長的高壓電線會造成瞬態尖峰脈衝電壓的範圍更大；從輸出端反向輸入（- 60V至0V）的情形也是有可能的。而針對這樣情形下，RT9068 能提供最佳的解決方案，因為 RT9068 本身可防止電流從輸出端流到輸入端，而且不需要外加保護二極體。 <a class="fancybox" href="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image004_zh-tw.png"> <img id="圖片 8" alt="Technical Document Image Preview" height="271" src="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image004_zh-tw.png" width="680"></a> 圖四、RT9068 用於典型的電信應用中 <h2 id="__Bookmark__6">NPN 電晶體適用於高電流之應用</h2> 利用可調整輸出電壓之元件，如 RT9068GFP，並外加一 NPN 輸出電晶體，就可提供更高的輸出電流和 (或) 增加輸出功率。將 VOUT 用來驅動電晶體的基極，而接腳 SENSE 和 (或) FB 則監測實際的輸出電壓，如圖五所示。 <a class="fancybox" href="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image005_zh-tw.png"> <img id="圖片 9" alt="Technical Document Image Preview" height="259" src="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image005_zh-tw.png" width="444"></a> 圖五、RT9068 驅動高輸出電流的應用 <h2 id="__Bookmark__7">LED 驅動器之應用</h2> RT9068可用來驅動數個串聯連接的 LED 燈串，如圖六所示。將 PWM 調光信號輸入於 SHDN 接腳，就可以調變由串聯之 LED 串構成的陣列的光強度。因此，可用 RT9068 來設計一低成本、高輸入電壓之 LED 驅動器。 <a class="fancybox" href="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image006_zh-tw.png"> <img id="圖片 11" alt="Technical Document Image Preview" height="448" src="/content/dam/richtek-eds/resources/application-notes/an030/html-images-zh-tw/image006_zh-tw.png" width="515"></a> 圖六、RT9068於LED陣列驅動器的應用 <h2 id="__Bookmark__8">總結</h2> RT9068 不僅封裝小，也具有卓越的性能。它可以在高電壓輸入電源下，提供低電壓；在過去，若是相同的應用，都必須預先在外部調節電壓，或用較複雜的交換式電源等方式才能辦到。RT9068 具有低靜態電流，可減小功率消耗；若進入關閉狀態，則可更進一步降低功耗。無論使用何種輸出電容，甚至是小型陶瓷電容，它都能提供穩定的輸出電壓。RT9068內部具有保護電路，所以不需外部的保護二極體。8接腳的散熱增強型 MSOP 封裝能提供更低的熱阻，使其能容忍並適用在各樣的工作環境。 在許多通信、汽車和工業系統的應用中，常需將高達 60V，甚至是 80V 這樣的寬輸入電壓轉換成 24V/12V/5V 或更低的電壓，以作為電子系統的電源。而在許多12V和24V 的系統中，也常會有接近80V 的電壓瞬變，因此在設計上都需要特別留意。 RT9068提供了業界最全面的寬輸入電壓範圍 (可至60V)，且不需在輸入端加上外部保護元件，因此可降低成本和整體的尺寸，並且還能提高系統的可靠性。此外，此元件可應用於多種電壓源，因此具有很好的可擴展性，即可以重覆使用功率轉換器的設計。 <div> <table border="1" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="width: 623.6pt; border-collapse: collapse; border: none" width="831"> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; background: #009EB8; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 種類 </td> <td colspan="2" style="width: 163.85pt; border: solid #009EB8 1.0pt; border-left: none; background: #009EB8; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="218"> 高電壓、低靜態電流 </td> <td colspan="4" style="width: 273.4pt; border: solid #009EB8 1.0pt; border-left: none; background: #009EB8; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="365"> 超高電壓 </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> RT9058 </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> RT9069 </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> RT9068 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> RT2501 </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> RT2064Q </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> RT2572 </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 狀態 </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> 可供貨 </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> 可供貨 </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> 可供貨 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> 即將發表 </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> 即將發表 </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 即將發表 </td> </tr> <tr style="height: 1.0cm"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="80"> 可操作電壓 VIN (V) </td> <td colspan="2" style="width: 163.85pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="218"> 3.5V ~ 36V </td> <td colspan="3" style="width: 213.45pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="285"> 4.5V ~ 60V </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="80"> 4.5V ~ 80V </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> AMR (V) </td> <td colspan="2" style="width: 163.85pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="218"> -0.3V ~ 40V </td> <td colspan="3" style="width: 213.45pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="285"> -60V ~ 80V </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> -80V ~ 90V </td> </tr> <tr style="height: 17.0pt"> <td rowspan="2" style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> VOUT (V) </td> <td rowspan="2" style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> 2.5V/3V/3.3V/5V/ 6V/9V/12V </td> <td rowspan="2" style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> 2.5V/3V/3.3V/5V/ 6V/9V/12V </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> 2.5V/3.3V/5V </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> 2.5V/3.3V/5V </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> 2.5V/3.3V/5V </td> <td rowspan="2" style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 可調整 </td> </tr> <tr style="height: 1.0cm"> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="91"> 1.25V ~ 60V 可調整 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="97"> 1.25V ~ 60V 可調整 </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 1.0cm" width="96"> 1.25V ~ 60V 可調整 </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> IOUT (mA) </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> 100mA </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> 200mA </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> 50mA </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> 250mA </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> 100mA </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 20mA </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> ILIM (mA) </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> 115mA </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> 200mA </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> 120mA </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> 450mA </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> 200mA </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 40mA </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> IQ (μA) </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> 2μA </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> 2μA </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> 30μA </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> 50μA </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> 30μA </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 23μA </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> ISHDN (μA) </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> 0.5μA </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> 0.5μA </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> 2μA </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> 3μA </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> 2μA </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 3μA </td> </tr> <tr style="height: 17.0pt"> <td style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 精確度 (%) </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> ±2 </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> ±2 </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> ±2 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> ±2 </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> ±2 </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> ±2 </td> </tr> <tr style="height: 17.0pt"> <td rowspan="4" style="width: 60.2pt; border: solid #009EB8 1.0pt; border-top: none; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> 封裝形式 </td> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> SOT-23-3 </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> SOT-23-5 </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> PSOP-8 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> PSOP-8 </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> PSOP-8 </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> SOT-23-5 </td> </tr> <tr style="height: 17.0pt"> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> SOT-23-3 (L) </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> SOT-89-5 </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> MSOP-8 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> TO-252 </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> MSOP-8 </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> DFN3x3-8 </td> </tr> <tr style="height: 17.0pt"> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> SOT-89-3 </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> PSOP-8 </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> SOT-223 </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> SOT-223 </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> </td> </tr> <tr style="height: 17.0pt"> <td style="width: 85.65pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="114"> PSOP-8 </td> <td style="width: 78.2pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="104"> </td> <td style="width: 68.55pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="91"> </td> <td style="width: 72.8pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="97"> </td> <td style="width: 72.1pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="96"> </td> <td style="width: 59.95pt; border-top: none; border-left: none; border-bottom: solid #009EB8 1.0pt; border-right: solid #009EB8 1.0pt; padding: .75pt .75pt .75pt .75pt; height: 17.0pt" width="80"> </td> </tr> </table> </div> <h2 id="__Bookmark__9">參考資料</h2> <div class="tb-system"> <table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="width: 496.9pt; border-collapse: collapse" width="663"> <tr> <td style="width: 15.0pt; padding: .75pt .75pt .75pt .75pt; height: 24pt" valign="top" width="20"> [1] </td> <td style="width: 481.9pt; padding: .75pt .75pt .75pt .75pt; height: 24pt" valign="top" width="643"> Stefano Pietri,Chris Dao, Jehoda Refaeli, Alfredo Olmos, and Xiaolei Wu, “A Versatile Low-Dropout Voltage Regulator for Automotive Applications”, IEEE 2011. </td> </tr> <tr> <td style="padding: .75pt .75pt .75pt .75pt"></td> <td style="width: 481.9pt; padding: .75pt .75pt .75pt .75pt" width="643"> </td> </tr> <tr style="height: 12.75pt"> <td style="width: 15.0pt; padding: .75pt .75pt .75pt .75pt; height: 12.75pt" valign="top" width="20"> [2] </td> <td style="width: 481.9pt; padding: .75pt .75pt .75pt .75pt; height: 12.75pt" valign="top" width="643"> Ashok Bindra, “Selecting the Right Ultra-Low Quiescent-Current LDO Regulator “, Digi-Key Corporation Article Library, 2014. </td> </tr> </table> </div> <div> <table border="1" cellspacing="0" cellpadding="0" style="width: 637.5pt; border-collapse: collapse; border: medium none;" class="3-51"> <tbody> <tr style="height: 17pt;"> <td style="border-width: 1pt 1px 1px 1pt; border-style: solid; border-color: #009eb8; background-color: #009eb8; background-image: url(e); background-repeat: repeat; background-attachment: scroll; background-clip: border-box; background-origin: padding-box; background-size: auto auto; padding-right: 5pt; padding-left: 5pt; height: 17pt;" colspan="2"> 相關資源 </td> </tr> <tr> <td style="border-width: 1pt 1px 1px 1pt; border-style: solid; border-color: #009eb8; background-color: #ffffff; background-image: url(e); background-repeat: repeat; background-attachment: scroll; background-clip: border-box; background-origin: padding-box; background-size: auto auto; padding-right: 5pt; padding-left: 5pt; height: 17pt;"> 立錡科技電子報 </td> <td style="border-width: 1pt 1px 1px 1pt; border-style: solid; border-color: #009eb8; background-color: #ffffff; background-image: url(e); background-repeat: repeat; background-attachment: scroll; background-clip: border-box; background-origin: padding-box; background-size: auto auto; padding-right: 5pt; padding-left: 5pt; height: 17pt;"> <a class="link" href="http://www.richtek.com/My%20Richtek/Newsletters" target="_blank">訂閱立錡科技電子報</a> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: 1pt 1px 1px 1pt; border-style: solid; border-color: #009eb8; background-color: #ffffff; background-image: url(e); background-repeat: repeat; background-attachment: scroll; background-clip: border-box; background-origin: padding-box; background-size: auto auto; padding-right: 5pt; padding-left: 5pt; height: 17pt;"> 檔案下載 </td> <td style="border-width: 1pt 1px 1px 1pt; border-style: solid; border-color: #009eb8; background-color: #ffffff; background-image: url(e); background-repeat: repeat; background-attachment: scroll; background-clip: border-box; background-origin: padding-box; background-size: auto auto; padding-right: 5pt; padding-left: 5pt; height: 17pt;"> <a class="link" href="http://www.richtek.com/Design%20Support/Technical%20Document/~/media/AN%20PDF/AN030_TW.ashx">PDF 下載</a> </td> </tr> </tbody> </table> </div> </div>

false

i18n(article-attachment.related-product-list.title)

_ATTACHMENT_HIDDEN_FIELD_

related-products

_ATTACHMENT_HIDDEN_FIELD_

applicationNoteArticle

width

fixed-width

articleSection

application-note

true

relatedProductList

left

btnAllApplicationNote2

text-with-icon

secondary

i18n(button-item.all-application-note.button-label)

i18n(button-item.all-application-note.button-link)

_self

false

width

fixed-width

productListSection

100