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RT2857B是一款高效率、單晶同步降壓型DC/ DC轉換器,在4.5V至18V的輸入電源範圍可提供最高為6A的輸出電流。RT2857B 藉由外部補償的電流模式架構使得在很寬範圍的負載及輸出電容中,都可得到最佳的瞬態回應。逐週期電流限制保護元件免受輸出短路影響;軟啟動功能可在啟動過程中防止了輸入電流過沖。故障保護包括輸出欠壓保護,輸出過壓保護,過溫保護。低電流消耗之電源關閉模式會將輸出關閉,有助於電池供電系統的電源管理。
低 RDS(ON) 功率MOSFET 開關26mΩ/19mΩ
輸入電壓範圍 : 4.5V 至 18V
可調整切換頻率 : 200kHz 至 1.6MHz
電流模式控制
與外部頻率 :200kHz 至 1.6MHz 同步
精確的參考電壓0.6V ± 1%,在 -40°C 至 85°C
單調啟動進入預偏壓模式
可調整的軟啟動
Power Good指示器
可選打嗝模式 (Hiccup Mode) 和栓鎖模式 ( Latch-Off Mode)之欠壓保護
過溫保護和過壓保護
輸入欠壓鎖定
符合RoHS標準及不含鹵素
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