<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 mb-20 text-center"><a href="/en/design-support/application-notes/an082?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51EN&sc_lang=en" 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/en_I51_01_EN.jpg"></a></div><div class="col-md-12 mb-40"><p>In noise-sensitive applications such as wireless base stations, RF amplifiers, medical devices, and industrial equipment, low-dropout linear regulators (LDOs) are crucial for filtering switching noise and external interference.</p></div><div class="col-md-12 "><div class="mb-2"><div class="section-title font-weight-bold mb-30 pb-3"> Richtek offers a wide range of low-noise industrial-graded LDOs with the following key features:</div><ol style="line-height:2;"><li style="list-style-position:outside;"><b>High Precision, Low Output Voltage</b>：Richtek’s industrial-graded LDOs support an input voltage range from 1.1V to 6.5V, requiring only a single power input without additional power sources, simplifying system design. Some products provide an ultra-low output voltage down to 0.5V with high accuracy of ±1%.</li><li style="list-style-position:outside;"><b>Superior Noise Immunity</b>：With high Power Supply Rejection Ratio (PSRR) of approximately 40dB at 500kHz and excellent noise immunity of 6.8 µVRMS, our industrial-graded LDOs effectively reduce noise interference.</li><li style="list-style-position:outside;"><b>Ultra-Low Dropout</b>：Ultra-low dropout voltage reduces power consumption. For example, the<a href="https://www.richtek.com/RedirectToProduct?specid=RTQ2540H&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51EN&sc_lang=en" target="_blank" style="text-decoration: none; color: #37a6d9;"> RTQ2540H</a> achieves a maximum dropout of just 145mV at 4A load, minimizing heat dissipation while improving efficiency, ideal for high-power applications.</li><li style="list-style-position:outside;"><b>Compact Packaging for Space-Constraint Designs</b>：Richtek provides some LDOs housed in ultra-small WQFN 2.2mm × 2.5mm packages, optimized for high-density PCB layouts.</li><li style="list-style-position:outside;"><b>Flexible Design Options</b>：Some LDOs feature an NR/SS pin for enhanced noise reduction via an external bypass capacitor. Additionally, our easy-out LDO series allows output voltage setting via pin strapping without resistors, ideal for I/O power and GPIO applications.</li></ol></div></div><div class="col-md-12 "><p>When selecting a low-noise LDO, key factors such as input/output range, PSRR, dropout voltage, packaging, and functionality must be considered. Richtek’s industrial-graded LDOs ensure reliable and stable power for diverse applications.</p></div><div class="col-md-12 mb-20 text-center"><a href="https://youtu.be/LNk77E9xU7k?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51EN&sc_lang=en" 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/en_EDM_video_EN.jpg"></a></div><div class="col-md-12 mb-20 text-center"><p>Please click the link below to get more technical details and Application Note!</p><div class="btn-block pb-4"><a href="/content/richtek-eds/en/design-support/application-notes/an082?&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue51EN&sc_lang=en" target="_blank" class="btn-sm btn-primary py-2 px-3">Watch the full AN now!<i class="fas fa-arrow-right pl-2"></i></a></div></div></div></div></div>