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RT6255A/B是高性能的同步Buck轉換器,負載能力5A,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和Power Good指示,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,其封裝形式有TSOT-23-6(FC)和TSOT-23-8。

應用

  • 機上盒
  • 可擕式電視機
  • 無線接入路由器
  • 數據機
  • 液晶電視機
主要規格
RT6255A RT6255B
Status Active Active
Vin (min) (V) 4.5 4.5
Vin (max) (V) 18 18
Number of Outputs 1 1
Vout (min) (V) 0.6 0.6
Vout (max) (V) 5 5
Output Adj. Method Resistor Resistor
Iout (max) (A) 5 5
Current Limit (typ) (A) 7.25 7.25
Freq (typ) (kHz) 500 500
Ext Sync No No
Ron_HS (typ) (mOhm) 45 45
Ron_LS (typ) (mOhm) 23 23
Iq (typ) (mA) 0.115 0.115
Features ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OTP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OTP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type TSOT-26(FC);TSOT-28(FC) TSOT-26(FC);TSOT-28(FC)
關鍵特性
  • 輸入電壓範圍:4.5V~18V
  • 負載能力:5A
  • 採用ACOT®控制架構,具有超快瞬態回應能力
  • 穩態工作頻率:500kHz
    ►強制PWM模式(RT6255B)
    ►輕載PSM模式(RT6255A)
  • 針對使用低ESR陶瓷輸出電容進行了優化
  • 輸出電壓可調範圍:0.6V~5V
  • 集成45mΩ/23mΩ功率開關
  • 逐週期電流限制保護
  • 預偏置相容軟啟動,時間1.5ms或外部可調可選
  • Power Good指示可選
  • 輸出欠壓保護
  • 過熱保護
  • 輸入欠壓鎖定保護
  • TSOT-23-6(FC)或TSOT-23-8(FC)封裝
Technical Documents
TitleItem TypeLast UpdateDownload
立錡全系列產品選擇指南 [Jan., 2024] Selection Guide2024/01/19
立錡精選產品 Product Tree 手冊 [Aug., 2023] Selection Guide2023/08/07
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT6255AHGJ6FTSOT-26(FC)3,000 Request Digikey 1,148 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT6255BHGJ6FTSOT-26(FC)3,000 Request Digikey 2,691 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT6255BHGJ8FTSOT-28(FC)3,000 Request Digikey 3,300 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
Evaluation Board
Part NumberDistributorStockBuy From Authorized Distributor
EVB_RT6255AHGJ6F Digikey 1 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
EVB_RT6255BHGJ8F Digikey 4 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
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