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RT8057A為高效率的脈波寬度調變(PWM)降壓型DC/DC轉換器,於輸入範圍2.7V 至5.5V時,輸出電流可達1A。RT8057適用于由單一鋰電池供電的可攜式電子裝置,例如行動電話、PDA、掌上型裝置、遊戲機與相關配件。內部的低RDS(ON)同步整流元件降低了操作在PWM模式的的導通損耗,且不需外加蕭特基二極體於實際設計中。RT8057A當PWM操作時若無法連續導通上端P-MOSFET時,則進入低壓降模式。當EN腳位為低電位時,進入關機模式,消耗電流小於1μA。由於操作在固定頻率2.25MHz,由開關切換產生的電壓漣波成分可輕易地由小型封裝的濾波元件濾除。RT8057A採用WDFN-6SL 2x2的封裝規格。
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