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UC3903DW - Texas Instruments

Description: Texas Instruments UC3903DW, Quad Voltage Supervisor, 18-Pin SOIC

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UC3903DW - Texas Instruments - PCB symbol
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PCB Footprints
UC3903DW - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DW(R-PDSO-G18)
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UC3903DW - Texas Instruments - 3D model - Small Outline Packages - DW(R-PDSO-G18)
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UC3903DW Details

  • Manufacturer Part Number:

    UC3903DW

  • Brand Name:

    Texas Instruments

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Pin Count:

    18

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    0

  • Adjustable Threshold:

    YES

  • Analog IC - Other Type:

    VOLTAGE SUPERVISOR/RESET IC

  • JESD-30 Code:

    R-PDSO-G18

  • JESD-609 Code:

    e4

  • Length:

    11.55 mm

  • Moisture Sensitivity Level:

    2

  • Number of Channels:

    4

  • Number of Functions:

    1

  • Number of Terminals:

    18

  • Operating Temperature-Max:

    70 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP18,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    2.65 mm

  • Supply Current-Max (Isup):

    18 mA

  • Supply Voltage-Max (Vsup):

    40 V

  • Supply Voltage-Min (Vsup):

    8 V

  • Supply Voltage-Nom (Vsup):

    15 V

  • Surface Mount:

    YES

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Threshold Voltage-Nom:

    1.8

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    7.5 mm

UC3903DW Frequently Asked Questions (FAQs)

  • The UC3903DW requires careful layout and placement to minimize noise and ensure proper operation. TI recommends placing the IC close to the input capacitors, using a star-ground configuration, and keeping the input and output traces separate to minimize noise coupling.
  • The input capacitors should be selected based on the input voltage, current, and frequency. TI recommends using low-ESR capacitors with a voltage rating of at least 1.5 times the maximum input voltage. A capacitance value of 10-22uF is typically suitable for most applications.
  • The UC3903DW can deliver up to 3A of output current, but this is dependent on the input voltage, output voltage, and thermal considerations. It's essential to ensure the device is properly heatsinked and the output current is within the recommended specifications.
  • The UC3903DW has a built-in overcurrent protection feature that can be enabled by connecting a resistor between the OC pin and GND. The resistor value determines the overcurrent threshold. TI recommends using a 1kΩ resistor for a 3A overcurrent threshold.
  • The EN (enable) pin is used to turn the device on and off. When the EN pin is pulled low, the device is in shutdown mode, and the output is disabled. This pin can be used to implement power sequencing or to turn off the device during idle periods.

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UC3903DW Overview

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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