UCS2112 Series

Dual USB Power Switch with Integrated Current Sensor

Catalog

Dual USB Power Switch with Integrated Current Sensor

Part	Fault Protection	Operating Temperature [Max]	Operating Temperature [Min]	Rds On (Typ)	Ratio - Input:Output [custom]	Switch Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Configuration	Package / Case	Mounting Type	Current - Output (Max) [Max]	Interface	Supplier Device Package	Number of Outputs
Microchip Technology UCS2112-2-V/G4-V02	Current Limiting (Adjustable) UVLO	105 °C	-40 °C	40 mOhm	1:1	USB Switch	5.5 V	4.5 V	High Side	20-VFQFN Exposed Pad	Surface Mount	3 A	I2C SMBus	20-QFN (4x4)	2
Microchip Technology UCS2112T-1-V/G4	Current Limiting (Adjustable) UVLO	105 °C	-40 °C	40 mOhm	1:1	USB Switch	5.5 V	4.5 V	High Side	20-VFQFN Exposed Pad	Surface Mount	3 A	I2C SMBus	20-QFN (4x4)	2

Catalog

Dual USB Power Switch with Integrated Current Sensor

Key Features

• + 3.0A continuous current per VBUS port with 40 mO 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

• + 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

• + UL recognized and EN/IEC 60950-1 (CB) Certified

Description

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.