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RT6257A/B是高性能的同步Buck轉換器,負載能力6A,輸入電壓範圍為4.5V~18V,集成了低RDS(ON) MOSFET功率開關、0.6V參考電壓源、自舉二極體,構成了非常緊湊的方案。它採用改進型固定導通時間(ACOT®)控制架構,具有超快瞬態回應能力,週邊元件少,在各種工作條件下的穩態工作頻率幾乎恒定不變,解決EMI問題的濾波器設計相對容易。它具有獨立的使能控制,方便進行時序控制;有1.5ms軟起動設計可限制啟動期間的衝擊電流;具有逐週期電流限制保護、欠壓保護、輸入欠壓鎖定保護和過熱保護特性,其封裝形式為TSOT-23-6(FC)。
輸入電壓範圍:4.5V~18V
負載能力:6A
採用ACOT®控制架構,具有超快瞬態回應能力
容許使用低ESR的陶瓷輸出電容,輸出電壓紋波低
500kHz工作頻率
集成低阻抗MOSFET功率開關(30mΩ/20mOmega;),效率高,適合低占空比應用
輸出電壓可調範圍:0.6V~5V
內置軟啟動時間1.5ms
內置UVP/OTP
輸入欠壓鎖定保護
TSOT-23-6(FC)封裝
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