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Product Spec Banner
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RT5742是一款降壓開關電壓調節器，可從2.5V至5.5V的輸入電壓供應中提供可通過I<sup>2</sup>C接口進行數字可編程的輸出，並具有高達3.4MHz的操作能力。</br>使用專有架構和同步整流技術，RT5742能夠以超過80％的效率連續輸出2A，並在負載電流低至10mA時仍保持高效率。調節器以固定的2.4MHz切換頻率運行，從而減小了外部元件的數量。可以添加額外的輸出電容以提高在負載瞬變期間的穩定性，而不影響穩定性。</br>在中、輕載時，採用脈沖頻率調變（PFM）在節能模式下運行，室溫下靜態電流為50μA。即使在低靜態電流下，該器件在大負載變化期間也具有出色的瞬態響應。在較高負載時，系統會自動切換到固定頻率控制，以2.4MHz的頻率運行。在關閉模式下，供應電流低於1μA，從而降低功耗。如果需要固定頻率，可以禁用PFM模式。RT5742採用小型WL-CSP-11B 1.31x1.62（BSC）封裝。</br>建議結面溫度範圍為 -40°C 至 125°C。
RT5742 電路圖
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<div class="spec-list"><ul class="lv1"><li>輸出電壓可調範圍：0.3-1.3V，5mV解析度 </li><li>電壓變換速率可調 </li><li>工作頻率：2.4MHz </li><li>快速瞬態響應 </li><li>連續電流輸出能力：2A </li><li>輸入電壓範圍：2.5V-5.5V </li><li>數位可調整輸出電壓 </li><li>I<sup>2</sup>C 介面，工作頻率可達 3.4MHz </li><li>輕載時工作於 PFM 模式以提高效率 </li><li>靜態耗電：50μA（典型值） </li><li>輸入欠壓閉鎖保護 </li><li>過熱關機保護和超載保護 </li><li>可做開機時序控制用的Power Good 指示訊號 </li></ul></div>
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RT5742 訂購資訊
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<div class="spec-list"><ul class="lv1"><li>可穿戴和便攜式電子設備 </li><li>DDR記憶體，LPDDR3，LPDDR4，LPDDR5 </li><li>平板電腦，網絡筆記型電腦，超移動個人電腦 </li><li>智能揚聲器，語音助手設備 </li><li>電視棒，OTT和家庭娛樂設備 </li></ul></div>
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