Press Center
Home About us Products Support Quality & Certification Career Contact us
• Power Management
    Linear Regulators
    Low Dropout Linear Regulators
    DDR Termination Regulators
    Shunt Reference Regulators
    Step Down Switching Regulators
    Switching Regulator
    Step-Up DC-DC Converter
    PWM Controller
    White LED Driver
    Supervisory Circuit
    Voltage Detection and System R
    USB Power Switch
    Power Factor Control
    Li-Battery Protection or Charg
    FET Bias Controllers
    Combo IC
    Inverting DC-DC Converter
• Amplifier / Comparator
    Audio Amplifiers
    Operational Amplifier
    Voltage Comparator
• Analog Switches
    Video Signal Switch
    Analog Multiplexers, Demultipl
• Hall ICs
• Special Application ICs
    Motor Controller IC
    Interface and Driver Circuit
    Telecommunication Circuit
    Melody IC
    Alarm /Sound Generator IC
    Remote Controller IC
    Television Circuit
    Leakage Current Detector
    Automotive IC
    A-D or D-A Converters
    Radio and Cassette Recorder Ci
    Mouse&Keyboard Controller
    Transient Voltage Suppressors
    Sense Monitor
    Video Filter
    ZCB snubber
• Logic
    Power Mosfet
• SCRs
Home >
US251 Datasheet







The UTC US251 is a power distribution switch. It is intended for

applications such as USB where heavy capacitive loads and

short-circuits are likely to be encountered. This family offers

multiple devices with fixed current-limit thresholds for applications

between 0.5A and 2A.

The RDS(ON) of the MOSFET switch is as low as 80mΩ. OC is

open-drain output report over-current or over-temperature event

which has deglitch typical 9ms timeout period typically 9ms.

The UTC US251 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 UTC US251 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






* Single Power Switch Family

* 80-mΩ High-Side MOSFET

* Rated currents of 0.5 A, 1 A, 1.5 A, 2 A

* Accurate, Fixed, Constant Current Limit

* Deglitched Fault Reporting

* Output Discharge When Disabled

* Reverse Current Blocking

* Built-in Softstart

About us  |  Products  |  Contact us
Copyright 2011 UTC All received