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RT6228A/B/C是採用改進型固定導通時間 (ACOT®) 控制架構的同步Buck轉換器,具有非常快速的瞬態回應能力。RT6228A/B的輸入電壓範圍是4.5V至23V,RT6228C的輸入電壓範圍是5.1V至23V,RT6228A的輸出電壓可在0.6V至5.1V間進行調節。

應用

  • 工商業低功率系統
  • 電腦週邊
  • 液晶顯示器和電視機
  • 節能電器
  • 高性能DSP、FPGA、ASIC負載點調節器
主要規格
RT6228A RT6228B RT6228C
Status Active Active Active
Vin (min) (V) 4.5 4.5 5.1
Vin (max) (V) 23 23 23
Number of Outputs 1 1 1
Vout (min) (V) 0.6 3.267 5.049
Vout (max) (V) 5.1 3.333 5.151
Output Adj. Method Resistor Fixed Fixed
Iout (max) (A) 8 8 8
Current Limit (typ) (A) 12 12 10.4
Freq (typ) (kHz) 500 500 750
Ext Sync No No No
Ron_HS (typ) (mOhm) 20 20 20
Ron_LS (typ) (mOhm) 10 10 10
Iq (typ) (mA) 0.1 0.1 0.1
Features ACOT Control;Adjustable Current Limit;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Adjustable Current Limit;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control ACOT Control;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP;Ultrasonic Mode Control
Package Type UQFN3x3-12H(FC) UQFN3x3-12H(FC) UQFN3x3-12H(FC)
關鍵特性
  • 輸入電壓範圍:4.5V~23V(RT6228A/B),5.1V~23V(RT6228C)
  • 負載能力:8A
  • 採用ACOT®控制架構,瞬態回應速度快,容許使用陶瓷輸出電容
  • 固定工作頻率:500kHz(RT6228A/B),750kHz(RT6228C)
  • 集成20mΩ/10mΩ MOSFET功率開關
  • RT6228A輸出電壓可調範圍:0.6V~5.1V
  • RT6228C集成負載能力100mA的3.3V線性穩壓器
  • 預偏置軟起動
  • 逐週期電流限制保護
  • 輸入欠壓鎖定保護
  • 過熱關機保護
  • 輸出過壓/欠壓保護
  • 支援超聲工作模式
  • 300kHz時鐘信號輸出供外部電荷泵電路使用
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
Reference Design
TitleLast UpdateDownload
立錡負載暫態量測工具2018/11/01
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT6228AGQUFUQFN3x3-12H(FC)1,500 Request Digikey 1,476 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT6228CGQUFUQFN3x3-12H(FC)1,500 Request Digikey 1,456 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
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