<!-- Bootstrap core CSS --> <link href="/css/www-style.css" rel="stylesheet"> <link href="/css/bootstrap.css" rel="stylesheet"> <link href="/css/newsletter.css" rel="stylesheet"> <link href="/css/alfontawesome-all.css" rel="stylesheet"> <!-- Custom fonts for this template --> <section> <div class="key-container"> <div class="cus-content-subscribe"> <div class="row no-gutters"> <div class=" col-md-12"> <div class="page-header"> <a class="cus-btn btn-sm" href="https://www.richtek.com/My Richtek/Newsletters.aspx?sc_lang=zh-TW"><i class="fas fa-envelope"></i> 訂閱立錡電子報</a> </div> </div> </div> </div> </div> <div class="key-container pb-5"> <!-- Title start --> <div class="cus-content"> <div class="row no-gutters "> <div class="col-md-12 "> <div class="page-header"> <h1 class="font-weight-bold">低雜訊電源設計必讀！選擇最佳 LDO 的 5 大關鍵</h1> <i class="far fa-calendar-alt date-i"></i> <span class="ml-2 date">2025 年 04 月 28 日 | 電子報 51 期</span> </div> </div> </div> </div> <!-- Content End --> <div class="cus-content"> <div class="row no-gutters "> <div class="col-md-12 mb-20 text-center"> <a href="https://www.richtek.com/Design%20Support/Technical%20Document/AN082?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank"> <img class="img-center " style="max-width:600px;" alt="5 Key Factors for Choosing an Ideal LDO" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_I51_01_TW.jpg"></a> </div> <div class="col-md-12 mb-40"> <p>在無線基站、射頻放大器、醫療設備、工業應用等對雜訊敏感的應用中，低壓差線性穩壓器（LDO）對於濾除開關電源雜訊與外部干擾至關重要。</p></div> <div class="col-md-12 "> <div class="mb-2"> <div class="section-title font-weight-bold mb-30 pb-3">立錡多款工業用低雜訊 LDO，具備以下 5 大關鍵優勢：</div> <ol style="line-height:2;"> <li style="list-style-position:outside;"> <b>高精度、低輸出電壓</b>：立錡工業用 LDO 系列皆可支援 1.1V 至 6.5V 輸入範圍，單一輸入，無需額外電源，可簡化設計。部分產品輸出電壓可低至0.5V， 具備 1% 高精準度。</li> <li style="list-style-position:outside;"> <b>優異的雜訊抑制能力</b>：具有高 PSRR 電源紋波抑制比，約 500kHz 可達到 40dB，以及 6.8 µVRMS 雜訊抑制能力，可降低雜訊干擾。</li> <li style="list-style-position:outside;"> <b>低壓降(dropout)特性</b>：低壓降有助於降低功耗，例如 <a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2540H&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;">RTQ2540H</a> 在 4A 輸出時壓降最大僅 145mV，減少熱損失並提升效率，適用於高功率需求應用。 </li> <li style="list-style-position:outside;"> <b>小型封裝，節省空間</b>：立錡提供 WQFN 2.2mm x 2.5mm 超小型封裝作選擇，適合高密度 PCB 佈局。</li> <li style="list-style-position:outside;"> <b>彈性設計</b>：部分型號具 NR/SS 引腳，可透過外部旁路電容進一步降低噪聲。簡易輸出系列可透過引腳配置輸出電壓，不需電阻，適用於 I/O 電源與 GPIO 供電。</li> </ol> </div> </div> <div class="col-md-12 "> <p>選擇低雜訊 LDO 需考慮輸入輸出範圍、PSRR、壓降、封裝與功能。立錡提供高效能 LDO 系列，可滿足各類工業應用需求，確保電源穩定可靠。觀看影片查看更多資訊：</p> </div> <div class="col-md-12 mb-20 text-center"> <a href="https://youtu.be/O4UQtGmkjK8?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank"> <img class="img-center " style="max-width:600px;" alt="How to select low noise linear regulators" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_EDM_video_TW.jpg"></a> </div> <div class="col-md-12 mb-20 text-center"> <p>請點擊下方連結，獲取更多技術細節與應用案例！</p> <div class="btn-block pb-4"> <a href="https://www.richtek.com/Design%20Support/Technical%20Document/AN082?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" class="btn-sm btn-primary py-2 px-3">立即觀看完整應用解析 <i class="fas fa-arrow-right pl-2"></i> </a> </div> </div> </div> </div> <div class="cus-content"> <div class="row no-gutters"> <div class="col-md-12 pt-3"> <div class="new-product"> <h3 class="font-weight-bold">特色產品</h3> <p>快來看看有什麼新東西是你感興趣的</p> <p class="font-weight-bold"> ▸ 小尺寸、超低壓差系列</p> </div> </div> </div> <div class="row no-gutters"> <div class="col-md-12 text-center"> <table class="table table-hover table-bordered table-sm"> <thead class="thead-dark"> <tr> <th scope="col">Part Number</th> <th scope="col">Iout (A)</th> <th scope="col">Vin (V)</th> <th scope="col">Vout (V)</th> <th scope="col" style="max-width:80px;">RMS Noise (µV<sub>RMS</sub>)</th> <th scope="col" style="max-width:100px;">Typ. PSRR @ 500kHz (dB)</th> <th scope="col" style="max-width:120px;">Max Dropout @ Full load (mV)</th> <th scope="col">Package</th> <th scope="col">Features</th> <th scope="col">Buy</th> </tr> </thead> <tbody> <tr> <th scope="row"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2538H&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ2538H</a></th> <td>2</td> <td>1.1~6.5</td> <td>0.8~5.5</td> <td>6.8</td> <td>40</td> <td>90</td> <td>WQFN-12L-2.2x2.5</td> <td>EN, SS, PG</td> <td><a href="https://www.digikey.com/en/products/detail/richtek-usa-inc/RTQ2538HN-TA/22310051?s=N4IgTCBcDaIEoBUCKYCsBmAHACRAXQF8g" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_ic-cart.png" width="30px;" style="width: 30px;"></a></td> </tr> <tr> <th scope="row"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2539A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ2539A</a></th> <td>3</td> <td>1.1~6.5</td> <td>0.8~5.5</td> <td>6.8</td> <td>40</td> <td>130</td> <td>WQFN-12L-2.2x2.5</td> <td>EN, SS, PG</td> <td><a href="https://www.digikey.com/en/products/detail/richtek-usa-inc/RTQ2539AGQWF/22310058?s=N4IgTCBcDaIEoBUCKYCsBmAnAQRAXQF8g" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_ic-cart.png" width="30px;" style="width: 30px;"></a></td> </tr> <tr> <th scope="row"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2540H&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ2540H</a></th> <td>4</td> <td>1.1~6.5</td> <td>0.8~5.5</td> <td>6.8</td> <td>40</td> <td>145</td> <td>WQFN-12L-2.2x2.5</td> <td>EN, SS, PG</td> <td><a href="https://www.digikey.com/en/products/detail/richtek-usa-inc/RTQ2540HN-TA/22310045?s=N4IgTCBcDaIEoBUCKYCsAWADACRAXQF8g" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_ic-cart.png" width="30px;" style="width: 30px;"></a></td> </tr> </tbody> </table> </div> </div> <div class="row no-gutters"> <div class="col-md-12 py-3 "> <p class=" font-weight-bold"> ▸ 簡易輸出電壓系列</p> </div> </div> <div class="row no-gutters"> <div class="col-md-12 text-center"> <table class="table table-hover table-bordered table-sm"> <thead class="thead-dark"> <tr> <th scope="col">Part Number</th> <th scope="col">Iout (A)</th> <th scope="col">Vin (V)</th> <th scope="col">Vout Adj. (V)</th> <th scope="col" style="max-width:120px;">VOUT Range Easy-out (V)</th> <th scope="col" style="max-width:100px;">RMS Noise (µV<sub>RMS</sub>)</th> <th scope="col" style="max-width:120px;">Typ. PSRR @ 500kHz (dB)</th> <th scope="col" style="max-width:120px;">Max Dropout @ Full load (mV)</th> <th scope="col">Package</th> <th scope="col">Features</th> <th scope="col">Buy</th> </tr> </thead> <tbody> <tr> <th scope="row"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2532W&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ2532W</a></th> <td>2</td> <td>1.1~6.5</td> <td>0.8~5.5</td> <td>0.8~3.95</td> <td>6.8</td> <td>40</td> <td>125</td> <td>VQFN-20L-5x5</td> <td>EN, SS, PG</td> <td><a href="https://www.digikey.com/en/products/result?s=N4IgTCBcDaIEoBUCKYCsBmMB1EBdAvkA" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_ic-cart.png" width="30px;" style="width: 30px;"></a></td> </tr> <tr> <th scope="row"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2533W&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ2533W</a></th> <td>3</td> <td>1.1~6.5</td> <td>0.8~5.5</td> <td>0.8~3.95</td> <td>6.8</td> <td>40</td> <td>180</td> <td>VQFN-20L-3.5x3.5</td> <td>EN, SS, PG</td> <td><a href="https://www.digikey.com/en/products/result?s=N4IgTCBcDaIEoBUCKYCsBmdB1EBdAvkA" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_ic-cart.png" width="30px;" style="width: 30px;"></a></td> </tr> <tr> <th scope="row"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2537&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ2537</a></th> <td>4</td> <td>1.1~6.5</td> <td>0.8~5.5</td> <td>0.8~3.95</td> <td>6.8</td> <td>40</td> <td>240</td> <td>VQFN-20L-3.5x3.5</td> <td>EN, SS, PG</td> <td><a href="https://www.digikey.com/en/products/detail/richtek-usa-inc/RTQ2537GQV-2/22535333?s=N4IgTCBcDaIEoBUCKYCsBmA7CAugXyA" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-51/html-images/zh-tw_ic-cart.png" width="30px;" style="width: 30px;"></a></td> </tr> </tbody> </table> </div> </div> <!-- Content End --> <!-- Keywords start --> <div class="tag-content"> <div class="row no-gutters"> <div class="col-md-12 mb-40"> <div class="new-product"> <p>想獲得更多產品與設計相關知識？歡迎您點此<a class="link" href="https://www.richtek.com/My Richtek/Newsletters.aspx?sc_lang=zh-TW" target="_blank"> 訂閱立錡電子報</a>。</p> </div> </div> </div> <div class="row no-gutters align-items-start"> <div class="col-12"> <a class="badge btn-tag" href="https://www.richtek.com/applications/industrial?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW">工業應用</a> <a class="badge btn-tag" href="https://www.richtek.com/Products/Linear%20Regulator?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW">線性穩壓器</a> <a class="badge btn-tag" href="https://www.richtek.com/applications/communication-enterprise/telecom?&ActiveTab=Small Cell Base Stations&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51TW&sc_lang=zh-TW">小型基地台</a> </div> </div> </div> </div> </div> </section>