Description
The UCS2113-C is a dual USB port power switch
configuration which can provide 3A continuous current
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 UCS2113-C is well suited for both stand-alone and
applications having SMBus/I2C communications.
For applications with SMBus, the UCS2113-C provides
per-port current monitoring and three programmable
current limits per switch, ranging from 3.5A to 5.2A.
Per-port charge rationing is also provided ranging from
3.8 mAh to 246.3 Ah.
In stand-alone mode, the UCS2113-C provides three
current limits for both switches, ranging from
3.5A + 3.5A to 5.2A + 5.2A (see Table 1-1).
Both power switches include an independent VBUS
discharge function.
The UCS2113-C is available in a 4x4 mm 20-pin QFN package.

Features
• Dual-Port Power Switches:
- 2.9V to 5.5V source voltage range
- 3A continuous current per VBUS port with
40 m On resistance per switch
- Independent port power switch enable pins
- DUAL fault ALERT# active drain output pins
- Trip mode current limiting behavior
- 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:
- Three 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
• Automatic VBUS Discharge Function
• Wide Operating Temperature Range:
- -40°C to +105°C
• Passes Automotive AEC-Q100 Reliability Testing