UC2572DG4 by Texas Instruments | DC to DC Controller | Avnet ASIA
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UC2572DG4

Texas Instruments

DC DC Cntrlr Single-OUT Flyback Controller/PWM DC to DC Controller 4.2V to 35V Input 8-Pin SOIC Tube

Manufacturer Part #: UC2572DG4

Alternate Part #: UC2572DG4


legend RoHS Compliant

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Documents

Subs/Alternatives

Information

The UC3572 is a negative output flyback pulse width modulator which converts a positive input voltage to a regulated negative output voltage. The chip is optimized for use in a single inductor negative flyback switching converter employing an external PMOS switch. The block diagram consists of a precision reference, an error amplifier configured for voltage mode operation, an oscillator, a PWM comparator with latching logic, and a 0.5A peak gate driver. The UC3572 includes an undervoltage lockout circuit to insure sufficient input supply voltage is present before any switching activity can occur, and a pulse-by-pulse current limit. Output current can be sensed and limited to a user determined maximum value. The UVLO circuit turns the chip off when the input voltage is below the UVLO threshold. In addition, a sleep comparator interfaces to the UVLO circuit to turn the chip off. This reduces the supply current to only 50uA, making the UC3572 ideal for battery powered applications.

Key Features

  • Simple Single Inductor Flyback PWM for Negative Voltage Generation
  • Drives External PMOS Switch
  • Contains UVLO Circuit
  • Includes Pulse-by-Pulse Current Limit
  • Low 50uA Sleep Mode Current
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Screening Level
    Industrial
    MSL Level
    1
    Type
    Flyback Controller/PWM DC to DC Controller
    Max Processing Temp
    260
    Product Dimensions
    5 x 4 x 1.5 mm
    Lead Finish
    Gold
    Output Voltage
    -1 to -70 V
    Supplier Package
    SOIC
    Input Voltage
    4.2 to 35 V
    Pin Count
    8
    Mounting
    Surface Mount
    Operating Supply Voltage
    4.75 to 30 V
    Number of Outputs
    1
    Operating Temperature
    -40 to 85 °C
    Output Current
    0.5 A

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542390000"
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101

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