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 > Low Dropout Linear Regulators
LXXLD38 Datasheet






The UTC LXXLD38 is a typical LDO with the features of very low

dropout voltage as low as 0.20V at output current 3A.

For normal operation, two supply voltages are necessary. One

called control voltage from other equipment can shutdown the

output voltage and it should pull and hold the voltage of EN pin less

than 0.4V. Another one is the main supply voltage whose purpose is

for main power conversion, to keep the power dissipation low, and

to make the dropout voltage lower.

Internally, in the UTC LXXLD38, there’re many functions which

can be seen in the block figure to prevent the IC from being

damaged. Internal Power-On-Reset (POR) circuit can control the

two supply voltages to prevent fault operations of the circuit; the

thermal shutdown circuit is able to protect the device from over

thermal operation, and a current limit function will keep the device

work safely under current over-loads.

The UTC LXXLD38 can be used as an ideal to provide well

supply voltage in the applications, such as front-side-bus

termination on motherboard, NB applications, front side bus VTT

(1.0V/3A) and note book PC applications.




* Low Dropout VD=0.20V(typ.)@ IOUT=3A

* Low ESR Output Capacitor

* VREF=0.5V

* Fast Transient Response

* Output Voltage Adjustable through External Resistors

* POR(Power-On-Reset) controlling VCNTL and VIN

* With internal Soft-Start

* Internal Current Limit Protection

* Internal Under Voltage Protection

* Hysteretic Thermal Shutdown

* With Power-OK Output (with a Delay Time)

* Low Shutdown Quiescent Current (<30µA)

* Shutdown/Enable Control Function

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