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UC3572D - Texas Instruments

Description: Negative output Flyback pulse width modulator including an undervoltage lockout circuit

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UC3572D - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - D0008A
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UC3572D Details

  • Manufacturer Part Number:

    UC3572D

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    8

  • Country Of Origin:

    Mexico

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    VOLTAGE-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    35 V

  • Input Voltage-Min:

    4.2 V

  • Input Voltage-Nom:

    5 V

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e4

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    2 A

  • Output Voltage-Max:

    -1 V

  • Output Voltage-Min:

    -70 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max (Isup):

    15 mA

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    200 kHz

  • 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

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

    30

  • Width:

    3.9 mm

UC3572D Frequently Asked Questions (FAQs)

  • The UC3572D requires careful layout and placement to minimize noise and ensure proper operation. TI recommends placing the IC close to the power source, using a solid ground plane, and keeping the input and output traces short and separate.
  • The output inductor selection depends on the desired output voltage, current, and switching frequency. TI recommends using an inductor with a high saturation current, low DC resistance, and a suitable inductance value (e.g., 10-22 μH) to ensure stable operation.
  • The UC3572D can operate with input voltages up to 40V, but TI recommends keeping the input voltage below 30V for optimal performance and reliability.
  • The output voltage can be adjusted by changing the resistor divider network (R1 and R2) connected to the FB pin. The output voltage is determined by the ratio of R1 to R2, and the desired output voltage can be calculated using the formula provided in the datasheet.
  • The COMP pin is the output of the internal error amplifier, which is used to compensate for the voltage regulator's output. It can be used to add an external compensation network to improve the regulator's stability and transient response.

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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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