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RT9742 是用于 USB 应用的低成本、低压高侧功率开关，同时具备低导通电阻和低电流消耗的特性。
它集成了过流保护电路、短路电流折返电路、热关机保护电路和欠压锁定保护电路以实现所有的保护功能，有故障指示输出可向USB控制器指示故障状态，还集成了延时功能以防止冲击电流所造成的误操作。它是 USB 电源应用的理想选择，也同时支持其它灵活的应用，其封装形式有 TSOT-23-5、TSOT-23-5 (FC)与SOT-23-3。

应用

  • USB设备
  • 笔记本电脑
主要规格
RT9742A RT9742B RT9742C RT9742D RT9742E RT9742F RT9742G RT9742H RT9742J RT9742K RT9742L RT9742M RT9742N RT9742P RT9742Q RT9742R RT9742S RT9742U RT9742V
Status Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active Active
Number of Outputs 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Vin (min) (V) 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7
Vin (max) (V) 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
Ron (typ) (mOhm) 55 55 55;70 55;70 55;70 55;70 55;70 55;70 70 70 70 70 55;70 55 70 70 70 70 70
Iq (typ) (mA) 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03
Current Limit (typ) (A) 3.3 3.3 2.2 2.2 1.65 1.65 1.1 1.1 2.15 1.65 1.1 1.65 2.75 2.75 0.7 0.7 0.7 1.65 2.2
FLAG Indicator Yes Yes Yes Yes Yes Yes Yes Yes No No No Yes Yes Yes Yes Yes No Yes Yes
Iocp Adjustable No No No No No No No No No No No No No No No No No No No
Safety Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL Nemko;UL
Switch Type Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch Power Switch
Features Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP Enable Input;OCP;SCP
Package Type TSOT-25(FC) TSOT-25(FC) TSOT-25;TSOT-25(FC) TSOT-25;TSOT-25(FC) TSOT-25;TSOT-25(FC) TSOT-25;TSOT-25(FC) TSOT-25;TSOT-25(FC) TSOT-25;TSOT-25(FC) SOT-23 SOT-23 SOT-23 TSOT-25 TSOT-25(FC) TSOT-25(FC) TSOT-25 TSOT-25 SOT-23 TSOT-25 TSOT-25
关键特性
  • 70mΩ/55mΩ（典型值） N-MOSFET 开关
  • 工作电压范围：2.7V~6V
  • 具有反向电流阻止能力
  • 欠压锁定保护
  • 可消除抖动的故障指示
  • 具有电流折返特性的过热保护
  • 过流保护
  • 短路保护
  • UL认证编号：E219878
  • Nemko认证编号：NO87949
Datasheet
TitleLast UpdateDownload
70mΩ/55mΩ, 3A/2.5A/2A/1.5A/1A/0.5A 高侧功率开关2017/10/30
Technical Documents
TitleItem TypeLast UpdateDownload
立锜全系列产品选择指南 [Jan., 2024] Selection Guide2024/01/19
电源IC输入端的过应力分析 App. Note2016/07/01
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT9742AGJ5FTSOT-25(FC)3000 Request Buy from Distributor
RT9742ANGJ5FTSOT-25(FC)3000 Request Buy from Distributor
RT9742BGJ5FTSOT-25(FC)3000 Request Buy from Distributor
RT9742CGJ5TSOT-253000 Request Buy from Distributor
RT9742CGJ5FTSOT-25(FC)3000 Request Buy from Distributor
RT9742DGJ5TSOT-253000 Request Buy from Distributor
RT9742EGJ5TSOT-253000 Request Buy from Distributor
RT9742FGJ5TSOT-253000 Request Buy from Distributor
RT9742GGJ5TSOT-253000 Request Buy from Distributor
RT9742QGJ5TSOT-253000 Request Buy from Distributor
RT9742QNGJ5TSOT-253000 Request Buy from Distributor
RT9742SNGVSOT-233000 Request Buy from Distributor
RT9742UNGJ5TSOT-253000 Request Buy from Distributor
RT9742VGJ5TSOT-253000 Request Buy from Distributor
库存实际状况请联系代理商或业务窗口
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