The UCS2114 is a dual USB port power switch configuration which can provide 3.0A continuous current (3.4A maximum) per VBUS port with precision overcurrent limiting (OCL), port power switch enables, auto-recovery fault handling, undervoltage and overvoltage lockout, back-drive protection and back-voltage protection, and thermal protection.

The UCS2114 is well suited for both stand-alone and applications having SMBus/I2C communications. For applications with SMBus, the UCS2114 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 UCS2114 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.

The UCS2114 is available in a 3x3 mm 20-pin QFN package.

• Dual-Port Power Switches:
  • 2.9V to 5.5V source voltage range
  • 3.0A continuous current per VBUS port with 18mΩ 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 and 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
• 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
• Self-Contained Current Monitoring (No External Sense Resistor Required)
• Fully Programmable Per-Port Charge Rationing and Behaviors
• Configurable Per-Port BC1.2 VBUS Discharge Function
• -40°C to +105°C Operating Temperature Range
• 3x3 mm 20-pin QFN
• UL recognized and EN/IEC 60950-1 (CB) Certified