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RT8251為內建功率級MOSFET的DC/DC單晶片轉換器,可在寬輸入電壓範圍內達到5A的連續電流輸出,並具有良好的負載與電源電壓調節率,電流模式操作提供快速的暫態回應與簡易的迴路穩定架構。此外並提供了逐週期形式的限流機制與熱關斷保護功能,操作于關機模式時,只有25μA的低電流消耗。另可藉由所自行設計的緩啟動機制,降低啟動時產生過大的輸入電湧與輸出電壓峰值。RT8251只需要少數的外部元件,並支援WQFN-16L 3x3 與SOP-8 (裸露焊盤) 兩種封裝。
輸入電壓範圍 : 4.75V 至 24V
可調輸出電壓範圍 : 0.8V 至 16V
5A 輸出電流
25μA 的低關機電流
內建功率級 MOSFET : 70mΩ
效率高達 95%
固定操作頻率 570kHz
可採用低ESR的陶瓷電容做為輸出電容
過熱關機保護
逐週期的電流限制機制
符合RoHS規範與無鹵特性
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