UCS2112

The UCS2112 is a dual USB port power switch configuration which can provide 3.0A continuous current (3.4A maximum) per VBUS port.  The UCS2112 is well suited for both stand-alone and applications having SMBus/I2C communications. 

For applications with SMBus, the UCS2112 provides per-port current monitoring and eight programmable current limits per switch, ranging from 0.53A to 3.0A continuous current (3.4A maximum). Per-port charge rationing is also provided ranging from 3.8 mAh to 246.3 Ah. 

In Stand-alone mode, the UCS2112 provides eight current limits for both switches, ranging from 0.53A + 0.53A to 3A + 3A total continuous current.
Both power switches include an independent VBUS discharge function and constant current mode current limiting for BC1.2 applications.

Features
  • Dual-Port Power Switches: 3.0A continuous current per VBUS port with 40 mΩ On resistance per switch Independent port power switch enable pins Dual fault ALERT# active drain output pins Constant Current or Trip mode current limiting behaviors Undervoltage, overvoltage lockout, back-drive, back-voltage protection Auto-recovery fault handling with low test current BOOST# logic output to increase DC-DC converter output under large load conditions A_DET# open-drain outputs for device attach detection per port
  • 3.0A continuous current per VBUS port with 40 mΩ On resistance per switch
  • Independent port power switch enable pins
  • Dual fault ALERT# active drain output pins
  • Constant Current or Trip mode current limiting behaviors
  • Undervoltage, overvoltage lockout, back-drive, back-voltage protection
  • Auto-recovery fault handling with low test current
  • BOOST# logic output to increase DC-DC converter output under large load conditions
  • A_DET# open-drain outputs for device attach detection per port
  • SMBus 2.0/I2C™ Mode Features: Eight programmable current limits assignable to each power switch Other SMBus addresses available upon request Block read and block write
  • Eight programmable current limits assignable to each power switch
  • Other SMBus addresses available upon request
  • Block read and block write
  • 4x4 mm 20-pin QFN
  • Self-contained current monitoring (no external sense resistor required)
  • Fully programmable per-port charge rationing and behaviors
  • Per-port BC1.2 VBUS Discharge Function
  • -40°C to +105°C
Parameter
Parameter Name Value Value
Description Dual USB Port Power Switch with Current Sensor Dual USB Port Power Switch with Current Sensor
USB Port Power Switch 2 2
8 Resistor Set Current Limits Up to 3.2A Up to 3.2A
Attach Detection Output yes yes
Interface I2C/SMBus I2C/SMBus
Current Measurement yes yes
Documents
UCS2112 Data SheetData Sheets10/23/2015984KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
UCS2112-1-V/G420QFN-40C to +105CTUBE2.462.051.861.821.80
UCS2112T-1-V/G420QFN-40C to +105CT/R**********
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
UCS2112-1-V/G40.0431000.07692320QFN4x4x0.9mmMatte Tine3
UCS2112T-1-V/G40.0431000.21212120QFN4x4x0.9mmMatte Tine3
UCS2112 Data Sheet UCS2112
UCS2112 Data Sheet ADM00639