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RT6206B是一款ACOT(Advanced Constant On-Time)操作模式的同步降壓型DC/DC轉換器,輸入電壓4.5V至18V範圍內,最大電流輸出為5.5A。系統操作於ACOT模式下可在廣負載變動範圍內提供良好的暫態回應,並於輸出電容的選擇上可選用具較小ESR的陶瓷電容,並確保整體系統表現的穩定性。此外,RT6206B在輸入與負載變動情形下仍能提供良好的固定操作頻率表現,內建的整流開關可允許在輸出在全負載變動範圍內提供良好的轉換效率。藉由偵測同步整流開關的端電壓可達到逐週期形式的限流機制,並可藉由外部的電容設計達到緩啟動效果,消除啟動時產生過大的輸入電湧。在保護機制方面,RT6206B具有過溫保護功能。RT6206B提供SOP-8(散熱焊盤)和WDFN-10L 3x3封裝。
具ACOT™ 操作模式提供快速的暫態回應
4.5V至18V 輸入電壓範圍
5.5A 輸出電流
35mΩ 內部低側N-MOSFET
進階的固定導通時間控制
允許陶瓷電容作為輸出電容
效率可達95%
輕載下操作於Discontinuous Operating Mode
可調輸出電壓範圍0.765V至8V
可調緩啟動
逐週期電流限制
輸入欠電壓鎖定
過溫保護
符合RoHS規範與無鹵特性
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