MAX1823:双路、USB开关,带有故障屏蔽及自复位功能

The MAX1823 is a dual, current-limited switch with autoreset specifically made for USB applications. The autoreset feature latches the switch off if the output is shorted, saving system power. The switch reactivates when the short circuit is removed. Each channel is guaranteed to supply 720mA and meet USB specifications. Low quiescent supply current (50µA) and standby current (3µA) conserve battery power in portable applications. The MAX1823 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. Accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor (µP) when a thermal-overload, current-limit, undervoltage-lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature ignores momentary faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. The MAX1823A/MAX1823B also block reverse current (current from OUT_ to IN_) while in shutdown. The MAX1823 is available in a space-saving 10-pin µMAX® package. The MAX1823/MAX1823A are enabled with an active-low signal, and the MAX1823B/MAX1823H are enabled with an active-high signal. For a single version of this device, refer to the MAX1946 data sheet. For a triple version, refer to the MAX1940 data sheet.

关键特性
  • Dual USB Switch in Tiny 10-Pin µMAX Package
  • Autoreset Feature Saves Power
  • Guaranteed 720mA Load per Channel
  • Built-In 20ms Fault Blanking
  • Compliant to USB Specification
  • Blocks Reverse Current in Shutdown (MAX1823A/MAX1823B)
  • 4V to 5.5V Input Voltage Range
  • Independent Shutdown Control
    • (MAX1823/MAX1823A—Active Low)
    • (MAX1823B/MAX1823H—Active High)
  • Independent active-low FAULT Indicator Outputs
  • Thermal-Overload Protection
  • 50µA Quiescent Current (Both Switches On)
  • 3µA Standby Current
功能框图
MAX1823、MAX1823A、MAX1823B、MAX1823H:功能框图
产品应用
  • 坞站
  • 笔记本电脑与台式计算机
  • PDA与掌上电脑
  • USB端口和集线器
关键参数
Part NumberUSBPower SwitchesCurrent Limit
(mA)
Current Limit
(mA)
Fault IndicatorCurrent Limit Accuracy
(%)
Current Limit Set ByRON
(Ω)
VSUPPLY
(V)
VSUPPLY
(V)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
Min.Max.typminmaxSee Notes
MAX1823AYes2720720Yes25Preset0.07545.5-40 to +85
µMAX/10
$1.03 @1k
MAX1823B
µMAX/10
数据手册DataSheet
英文MAX1823-MAX1823H.pdfRev 3; 11/2003
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1823AEUB停止供货MAX1823AEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1823AEUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823AEUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823AEUB-T停止供货MAX1823AEUB+TuMAX;10引脚-40°C至+85°C参考数据资料
MAX1823BEUB最后一次购买MAX1823BEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1823BEUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823BEUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823BEUB-T停止供货MAX1823BEUB+TuMAX;10引脚-40°C至+85°C参考数据资料
MAX1823EUB停止供货MAX1823AEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1823EUB+停止供货MAX1823AEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX1823EUB+T停止供货MAX1823AEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823EUB-T停止供货MAX1823AEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1823HEUB停止供货MAX1823BEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1823HEUB+停止供货MAX1823BEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823HEUB+T停止供货MAX1823BEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1823HEUB-T停止供货MAX1823BEUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1823-MAX1823H.pdf MAX1823B
MAX1823-MAX1823H.pdf MAX1823B
MAX1823B.pdf MAX1823B
MAX1823.pdf MAX1823B
MAX1823A.pdf MAX1823A