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RT6228A/B/C是采用改进型固定导通时间 (ACOT®) 控制架构的同步Buck转换器，具有非常快速的瞬态响应能力。RT6228A/B的输入电压范围是4.5V至23V，RT6228C的输入电压范围是5.1V至23V，RT6228A的输出电压可在0.6V至5.1V间进行调节。

应用

  • 工商业低功率系统
  • 计算机外设
  • 液晶显示器和电视机
  • 节能电器
  • 高性能DSP、FPGA、ASIC负载点调节器
主要规格
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)
关键特性
  • 输入电压范围：4.5V~23V(RT6228A/B)，5.1V~23V(RT6228C)
  • 负载能力：8A
  • 采用ACOT®控制架构，瞬态响应速度快，容许使用陶瓷输出电容
  • 固定工作频率：500kHz(RT6228A/B)，750kHz(RT6228C)
  • 集成20mΩ/10mΩ MOSFET功率开关
  • RT6228A输出电压可调范围：0.6V~5.1V
  • RT6228C集成负载能力100mA的3.3V线性稳压器
  • 预偏置软起动
  • 逐周期电流限制保护
  • 输入欠压锁定保护
  • 过热关机保护
  • 输出过压/欠压保护
  • 支持超声工作模式
  • 300kHz时钟信号输出供外部电荷泵电路使用
Technical Documents
TitleItem TypeLast UpdateDownload
立锜全系列产品选择指南 [Jan., 2024] Selection Guide2024/01/19
立锜精选产品 Product Tree 手册 [Aug., 2023] Selection Guide2023/08/07
Reference Design
TitleLast UpdateDownload
立锜负载瞬变测试工具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
库存实际状况请联系代理商或业务窗口
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