UNISONIC TECHNOLOGIES CO., LTD

US236H

Preliminary

CMOS IC

www.unisonic.com.tw

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Copyright © 2017 Unisonic Technologies Co., Ltd

POWER MULTIPLEXER FOR

USB HIGH SIDE SWITCH

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DESCRIPTION

The UTC US236H is a power distribution switch. It is intended

for USB applications where heavy capacitive loads and

short-circuits are likely to be encountered. It switches output

voltage to 5VSB at S3/S4/S5 states with 400mΩ switch and 200mA

Continuous Load Current; to 5VCC at S0/S1/S2 states with 80mΩ

switch and 1.5A Continuous Load Current.

The UTC US236H features an active-high enable control input.

Quiescent Supply Current is only 50uA when enabled, but standby

current down to less than 1uA when disabled.

Optimal switch logic according to S3# and 5VCC status ensures

seamless output voltage transition.

The UTC US236H device limits the output current to a safe

level by switching into a constant-current mode when the output

load exceeds the current-limit threshold or a short is present. Soft

start function limits the inrush current from supply input when

enabled or during plug-in. Thermal shutdown function prevents

catastrophic switch failure from high-current loads. Under-voltage

lockout (UVLO) ensures that the device remains off unless there is

a valid input voltage present. OC is open-drain output to report

over-current and over-temperature event.

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FEATURES

* Operating Range: 4.5V~5.5V

* Quiescent Supply Current: 50uA (TYP.)

* Standby Supply Current: 1µA (Max.)

* Output Voltage Switch to 5VSB at S3/S4/S5

400mΩ High Side Switch

200mA Continuous Load Current

* Output Voltage Switch to 5VCC at S0/S1/S2

80mΩ High Side Switch

1.5A Continuous Load Current

* Built-in Soft-Start

* Fast Turn Off

* Enable Active-High

* Meets USB Current-Limiting Requirements