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RT6368 是一款 3.5A 高效率非同步降壓轉換器(Asynchronous Buck Converter),採用峰值電流模式控制(Peak Current Mode Control)架構。產品支援 4V 至 60V 的寬輸入電壓範圍,輸出電壓可於 0.8V 至 VIN 之間進行設定。透過低靜態電流設計以及內建低導通電阻(RDS(ON))高側 MOSFET,可在廣泛負載條件下維持優異的轉換效率。 RT6368 採用峰值電流模式控制搭配簡單的外部補償設計,不僅可使用較小尺寸的電感元件,亦能提供快速的暫態響應及良好的迴路穩定性。 產品支援 100kHz 至 2500kHz 的寬範圍可調開關頻率,可讓設計人員根據效率與元件尺寸需求進行最佳化選擇。超低最小導通時間(Minimum On-Time)特性,使其即使在極高降壓比條件下仍能維持固定開關頻率運作。對於開關雜訊敏感的應用,RT6368 亦支援外部時脈同步功能,同步頻率範圍為 300kHz 至 2200kHz。 RT6368 內建完整保護功能,包括輸入欠壓鎖定保護(UVLO)、輸出欠壓保護(UVP)、輸出過壓保護(OVP)、過電流保護(OCP)及過溫保護(OTP)。逐週期限流保護(Cycle-by-Cycle Current Limit)可有效防止輸出短路造成損壞,而軟啟動(Soft-Start)功能則可降低啟動期間的湧入電流。 RT6368 採用 SOP-8(Exposed Pad)封裝。建議接面溫度範圍為 -40°C 至 150°C。
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<div class="spec-list"><ul class="lv1"><li>Wide Input Voltage Range - 4.5V to 60V - 4V to 60V (Soft-Start is Finished) </li><li>Wide Output Voltage Range: 0.8V to VIN </li><li>0.8V ±1.5% Reference Accuracy </li><li>Peak Current Mode Control </li><li>Integrated 80mΩ High-Side MOSFET </li><li>Low Quiescent Current: 100μA </li><li>Low Shutdown Current: 2.25μA </li><li>Adjustable Switching: 100kHz to 2.5MHz </li><li>Synchronizable Switching: 300kHz to 2.2MHz </li><li>Power Saving Mode (PSM) at Light Load </li><li>Low Dropout at Light Loads with Integrated Boot Recharge FET </li><li>Enable Control </li><li>Adjustable UVLO Voltage and Hysteresis </li><li>Built-In UVLO, UVP, OVP, OCP, OTP </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>12V, 24V and 48V Power Systems </li><li>GPS, Entertainment </li></ul></div>
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