US3X77 Datasheet, PDF (1/10 Pages) Unisonic Technologies – POWER DISTRIBUTION SWITCH

UNISONIC TECHNOLOGIES CO., LTD
US3X77
POWER DISTRIBUTION SWITCH
„ DESCRIPTION
The UTC US3X77 is a power distribution switch and particularly
designed for self-powered and bus-powered Universal Serial Bus
(USB) applications.
The UTC US3X77 incorporates protection circuits including
current limiting circuit with foldback function, thermal shutdown circuit
designed to prevent catastrophic switch failure due to increasing
power dissipation when continuous heavy loads or short circuit
occurs. Besides, a built-in charge pump is used to drive the
N-channel MOSFET that is free of parasitic body diode to eliminate
any reversed current flow across the switch when it is powered off.
The R_DS(ON) of the MOSFET switch is as low as 100mΩ. OC is
open-drain output report over-current or over-temperature event
which has deglitch typical 9ms timeout period typically 9ms.
The UTC US3X77 is applied in high-side power protection
switch, USB power management, USB host and self-powered bubs,
USB bus-powered hubs, hot plug-in power supplies, battery-charger
circuits.
„ FEATURES
* 100mΩ High-Side MOSFET
* Supply Current:
Switch on : 65μA(Typ)
Switch off : 1μA (Max)
* Accurate Current Limit with Foldback
* Deglitched Open-Drain Over-Current Flag Output (OC)
* No Reverse Current when Power Off
* Under voltage Lockout
* Operating Range:2.7V ~ 5.5V
* Output Shutdown Pull-low Resistor
„ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US3X77XL-S08-R
US3X77XG-S08-R
US3X77XL-S08-T
US3X77XG-S08-T
US3X77XL-SM1-R
US3X77XG-SM1-R
US3X77XL-SM1-T
US3X77XG-SM1-T
Package
SOP-8
SOP-8
MSOP-8
MSOP-8
CMOS IC
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 10
QW-R502-568.B