UNISONIC TECHNOLOGIES CO., LTD

US222

Preliminary

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2015 Unisonic Technologies Co., Ltd

QW-R129-012.a

0.5A TO 2.0A HIGH-SIDE

POWER DISTRIBUTION

SWITCHES



DESCRIPTION

The UTC US222 are low voltage cost-effective high-side

power switches with flag function. These devices are particularly

suitable for self-powered and bus-powered USB applications. The

USB voltage drop is as low as 85 mΩ.

The UTC US222 contains a charge pump circuitry to drive the

internal MOSFET switch and also incorporate such protection

circuits: soft-start circuit protect these devices from being

damaged by limiting inrush current during plug-in; thermal

shutdown circuit is used to prevent catastrophic switch failure

from high-current loads. UVLO is used to ensure that the device

remains off unless there is a valid input voltage present. A flag

output is designed to indicate fault conditions to the local USB

controller.

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FEATURES

* Low MOSFET On Resistance: 85mΩ

* Compliant to USB Specifications

* Available 4 Versions of Continuous Load: 0.5A/1.0A/1.5A/2.0A

* Logic Level Enable Pin: Available with Active-high or Active-low

Version

* Low Supply Current: 68µA (Typ.)

* Low Shutdown Current: 1.0µA (Max)

* Soft Start-up

* Under-voltage Lockout

* Over-current Protection

* Over Temperature Protection

* Load Short Protection with Fold-back

* Deglitched FLAG Output with Open Drain

* No Reverse Current When Power Off

* With Output Shutdown Pull-low Resistor

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ORDERING INFORMATION

Ordering Number

Package

Packing

US222XXG-AF5-R

SOT-25

Tape Reel

(1) R: Tape Reel

(2) AF5: SOT-25

(3) G: Halogen Free and Lead Free

(4) AL/AH: 2.0A, BL/BH: 1.5A, CL/CH: 1.0A, DL/DH: 0.5A

US222XXG-AF5-R

(1)Packing Type

(2)Package Type

(3)Green Package

(4)Current Limit