<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"><div class="key-container pb-5"><div class="cus-content"><div class="row no-gutters "><div class="col-md-12 text-center"><a href="https://www.youtube.com/watch?v=5rpDCLwzJ0g&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en " target="_blank"><img class="img-center" style="max-width:600px;" alt="RTQ5756 Four-Phase Synchronous Buck Converter Family" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_EDM_video.jpg"></a></div><div class="col-md-12 mb-40"><p>As AI and high-performance computing continue to shape modern technology, systems are increasingly integrating DSPs or FPGAs to support real-time processing and data-intensive workloads. These applications require higher current and compact designs, making high power density a critical challenge in power system design.</p><p>To address this, Richtek introduces its ACOT<sup>®</sup> 4-phase synchronous Buck converter family RTQ5756, supporting 3V to 5.5V input and 0.4V to 2.05V output. Housed in a compact WL-CSP2.69x3.92-54(BSC) package, this family enables a complete solution within a 70 mm³ form factor, delivering high power density of 0.285W/mm³. Its multi-phase topology reduces output ripple and improves efficiency, ideal for powering DSP in optical modules for AI data centers or high-current, space-constrained systems.</p></div><div class="col-md-12 "><div class="mb-2"><div class="section-title font-weight-bold mb-30 pb-3">Flexible Phase Configurations & Multiple Output Selections</div></div></div><div class="col-md-12 text-center"><img class="img-center " style="max-width:900px;" alt="Flexible Phase Configurations & Multiple Output Selections" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_I52_02.jpg"></div><div class="col-md-12 mb-40"><p>The RTQ5756 family supports 4 phase operation with various output configurations tailored to system requirements: 1+1+1+1 phase for four outputs, 2+1+1 or 3+1 phase for three outputs, 2+2 or 3+1 phase for dual outputs, and 4-phase single-output, supporting up to 20A output current. The I<sup>2</sup>C control enables configuration of power-on/off sequencing, watchdog timers, fault detection, dynamic voltage scaling, and slew rate settings, providing high flexibility in system design.</p></div><div class="col-md-12 "><div class="mb-2"><div class="section-title font-weight-bold mb-30 pb-3">Automatic Phase Adjustment for Optimized Efficiency</div></div></div><div class="col-md-6 "><img class="img-center " style="max-width:600px;" alt="Automatic Phase Adjustment for Optimized Efficiency" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_I52_03.jpg"></div><div class="col-md-6 d-flex align-items-center justify-content-center "><p>In multi-phase output mode, the device intelligently adapts switching frequency and dynamically manages phase addition or reduction based on load conditions. This Auto Phase Adding/Shedding feature reduces power consumption under light load while ensuring sufficient current delivery under heavy load, maximizing overall efficiency.</p></div><div class="col-md-12 "><div class="mb-2"><div class="section-title font-weight-bold mb-30 pb-3">High Power Density</div></div></div><div class="col-md-12 "><p>The total solution requires only 7mm×10mm×1mm of board space and supports up to 20W output power, achieving 0.285W/mm³ high power density, ideal for core power rails in compact systems.</p><div class="btn-block pb-4 pt-3"><a href="https://www.youtube.com/watch?v=5rpDCLwzJ0g&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" class="btn-sm btn-primary py-2 px-3">More product introduction and start-up configuration<i class="fas fa-arrow-right pl-2"></i></a> <a href="/content/dam/richtek-eds/resources/technical-documentations/en/design-tools/RTQ5756%20GUI.zip?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" class="btn-sm btn-primary py-2 px-3" style=" margin-top: 1rem;">Download the design tool<i class="fas fa-arrow-right pl-2"></i></a></div><p>Order the Wrenboard toolkit to start your RTQ5756 design.</p><div class="btn-block pb-4 pt-3"><a href="https://www.digikey.com/en/products/detail/richtek-usa-inc/RD0001-01/17728794" target="_blank" class="btn-sm btn-primary py-2 px-3">Order the Wrenboard toolkit<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 text-center"><table class="table table-hover table-bordered table-sm"><thead class="thead-dark"><tr><th scope="col">Product Number</th><th scope="col">Output Channel(s)</th><th scope="col">Output Phase</th><th scope="col">Output Current</th><th scope="col" style="max-width:80px;">Buy Online</th></tr></thead><tbody><tr><th scope="row" style="padding-top:8px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ5756A</a> <a href="https://www.richtek.com/SaveDownload.aspx?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="padding:0px;text-decoration:none;display:inline-block"><img align="middle" style="padding-bottom: 3px;" alt="download datasheet" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-download-2.png" width="30px;" height="30px" /></a></th><td>3</td><td>2+1+1</td><td>10A+5A+5A</td><td><a href="https://www.digikey.com/en/products/detail/richtek-usa-inc/RTQ5756AWSC/25994236?s=N4IgTCBcDaIEoBUCKBWA7CgbCAugXyA" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-cart.png" width="35px;" style="width: 35px;"></a></td></tr><tr><th scope="row" style="padding-top:8px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ5756B</a> <a href="https://www.richtek.com/SaveDownload.aspx?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="padding:0px;text-decoration:none;display:inline-block"><img align="middle" style="padding-bottom: 3px;" alt="download datasheet" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-download-2.png" width="30px;" height="30px" /></a></th><td>4</td><td>1+1+1+1</td><td>5A+5A+5A+5A</td><td><a href="https://forms.office.com/Pages/ResponsePage.aspx?id=6GOM0O6GNE6h5UQzg3P0seMVen-xb9hAr_ZA0LheCTNUOUJXOTZSRVZNSFlGU0xIMTZJMzRXSk9IRC4u" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-email.png" width="35px;" style="width: 35px;"></a></td></tr><tr><th scope="row" style="padding-top:8px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ5756C</a> <a href="https://www.richtek.com/SaveDownload.aspx?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="padding:0px;text-decoration:none;display:inline-block"><img align="middle" style="padding-bottom: 3px;" alt="download datasheet" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-download-2.png" width="30px;" height="30px" /></a></th><td>2</td><td>3+1</td><td>15A+5A</td><td><a href="https://forms.office.com/Pages/ResponsePage.aspx?id=6GOM0O6GNE6h5UQzg3P0seMVen-xb9hAr_ZA0LheCTNUOUJXOTZSRVZNSFlGU0xIMTZJMzRXSk9IRC4u" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-email.png" width="35px;" style="width: 35px;"></a></td></tr><tr><th scope="row" style="padding-top:8px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ5756D</a> <a href="https://www.richtek.com/SaveDownload.aspx?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="padding:0px;text-decoration:none;display:inline-block"><img align="middle" style="padding-bottom: 3px;" alt="download datasheet" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-download-2.png" width="30px;" height="30px" /></a></th><td>1</td><td>4</td><td>20A</td><td><a href="https://forms.office.com/Pages/ResponsePage.aspx?id=6GOM0O6GNE6h5UQzg3P0seMVen-xb9hAr_ZA0LheCTNUOUJXOTZSRVZNSFlGU0xIMTZJMzRXSk9IRC4u" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-email.png" width="35px;" style="width: 35px;"></a></td></tr><tr><th scope="row" style="padding-top:8px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="text-decoration: none; color: #37a6d9;font-size: 1.1rem;">RTQ5756E</a> <a href="https://www.richtek.com/SaveDownload.aspx?specid=RTQ5756&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue52EN&sc_lang=en" target="_blank" style="padding:0px;text-decoration:none;display:inline-block"><img align="middle" style="padding-bottom: 3px;" alt="download datasheet" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-download-2.png" width="30px;" height="30px" /></a></th><td>2</td><td>2+2</td><td>10A+10A</td><td><a href="https://forms.office.com/Pages/ResponsePage.aspx?id=6GOM0O6GNE6h5UQzg3P0seMVen-xb9hAr_ZA0LheCTNUOUJXOTZSRVZNSFlGU0xIMTZJMzRXSk9IRC4u" target="_blank"><img alt="Buy-on-Line" border="0" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-52/html-images/en_ic-email.png" width="35px;" style="width: 35px;"></a></td></tr></tbody></table></div></div></div></div>