100MΩ, 1/1.5A HIGH-SIDE POWER SWITCHES WITH FLAG
The UTC US204 series are 100mΩ high-side power switches.
There are internal duel low voltage N-Channel MOSFETS which whish is ideal all USB applications. These MOSFETS is driven by a charge pump circuitry inside, these switches on resistance are as low as 100mΩ which and meet the drop voltage for USB
The flag pins output an open-drain fault flag to next controller.
There’re lots internal special ways for protecting the chip’s operation. There are also built-in protection circnits to ensure the chips function normally.
When in hot-plug events, there’s large current which can create the upstream voltage droop to match the USB’s voltage droop requirements and soft-start for isolating the power source.
As soon as the die temperature is higher than 130℃, the internal shutdown circuit will work.
Only when there’s a normal input voltage in the VIN pin, the UVLO (under-voltage lockout, 2.1V typ.) can make sure the chip is in the off state.
Because of the requirement of USB power, the fault current should be ensured to be less than 1.5A for UTC US204AH/AL and 1.0A for UTC US204CH/CL.
* 100mΩ(Typ) N-Channel MOSFET
* Supply Current:
– Switch On : 60μA (Typ)
– Switch Off : 1μA (Typ)
* Load Current 1.5A for US204AH/AL and 1.0A for US204CH/CL
* Input Voltage from 2V ~ 5.5V
* In Off-State: Output Voltage can be Higher than Input