MAX1812:Dual USB Switch with Fault Blanking

The MAX1812 is a dual current-limited switch specifically made for USB applications. Each channel is guaranteed to supply 500mA and meets USB specifications. The MAX1812's low quiescent supply current (45µA) and shutdown current (3µA) conserve battery power in portable applications. The MAX1812 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. The device also has accurate internal current-limiting circuitry to protect the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor when a thermal-overload, current limit, undervoltage lockout, or short-circuit fault occurs. A 20ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, thereby preventing false alarms to the host system. The MAX1812 is available in a space-saving 10-pin µMAX package. For single versions of this device, refer to the MAX1693, MAX1694, and MAX1607 data sheets.

Key Features
  • Dual USB Switch in Tiny 10-Pin µMAX Package
  • Guaranteed 500mA Load per Channel
  • Built-In 20ms Fault Blanking
  • Compliant to USB Specifications
  • +4.0V to +5.5V Input Voltage Range
  • 45µA Quiescent Current
  • 3µA Shutdown Current
  • Independent Shutdown Control
  • Independent active-low FAULT Indicator Outputs
  • Thermal-Overload Protection
MAX1812: Typical Operating Circuit
MAX1812: Typical Operating Circuit
Applications/Uses
  • Computers: Desktop, Workstation, Server
  • Docking Stations
  • Notebook Computers
  • PDAs and Palmtop Computers
  • USB Hubs
  • USB Ports
DataSheet
titleDownload file
MAX1812 Data SheetMAX1812.pdf
Parametrics
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
minmaxtypminmaxSee Notes
MAX1812Yes2600600Yes33Preset0.07545.5-40 to +85µMAX/10$1.03 @1k
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1812EUBNo Longer AvailableMAX1812EUB+µMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1812EUB+ActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1812EUB+TActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1812EUB-TNo Longer AvailableMAX1812EUB+TµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
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