UNISONIC TECHNOLOGIES CO., LTD

US3026A

CMOS IC

www.unisonic.com.tw

1 of 11

Copyright © 2005 Unisonic Technologies Co., Ltd

QW-R502-086,A

DUAL-CHANNEL USB POWER

SWITCH AND OVER-CURRENT

PROTECTION

DESCRIPTION

The UTC US3026A is a standard dual channels power switch with

independent over-current protection fault flag functions, optimized for

bus-powered Universal Serial Bus (USB) and self-powered

applications, including Notebook and desktop PC’s that supply

power to more than one port.

The UTC US3026A also offers thermal shutdown protection that

reduces current consumption in fault modes for each switch and the

entire device. With a 1ms delay on the fault FLAG output prevents

erroneous over current reporting caused by in-rush currents during

hot-plug events.

In addition, the UTC US3026A employs soft-start circuitry that

minimizes in-rush current in applications where highly capacitive

loads are employed.

FEATURES

* Two P-channel power MOSFET control switch

* 110µA Max operating current

* 5µA Max standby current

* 145 mΩ Max switch resistance

* 2.7V ~ 5.5V input voltage range

* 500mA minimum continuous load current

* Smooth turn-on eliminates in-rush induced voltage drop

* 1 ms fault flag delay filters Hot-Plug events

* Over-current protection

* Under-voltage lockout circuit

* Thermal shutdown protection

* Flag indicates fault conditions

SOP-8

*Pb-free plating product number: US3026AL

ORDERING INFORMATION

Order Number

Normal

Lead Free Plating

Package

Packing

US3026A-S08-R

US3026AL-S08-R

SOP-8

Tape Reel

US3026A-S08-T

US3026AL-S08-T

SOP-8

Tube

US3026AL-S08-R

(1)Packing Type

(2)Package Type

(3)Lead Plating

(1) R: Tape Reel, T: Tube

(2) S08: SOP-8

(3) L: Lead Free Plating, Blank: Pb/Sn