UC2578DPTR by Texas Instruments | DC to DC Controllers | Avnet ASIA
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UC2578DPTR

Texas Instruments

DC DC Cntrlr Single-OUT Step Down 14V to 72V Input 16-Pin SOIC T/R

Manufacturer Part #: UC2578DPTR

Alternate Part #: UC2578DPTR


RoHS Compliant

Descriptions

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Information

The UC3578 is a PWM controller with an integrated high side floating gate driver. It is used in buck step down converters and regulates a positive output voltage. Intended to be used in a distributed power system, the IC allows operation from 14V to 72V input voltage which range includes the prevalent telecomm bus voltages. The output duty cycle of the UC3578 can vary between 0% and 90% for operation over the wide input voltage and load conditions.

The UC3578 simplifies the design of the single switch PWM buck converter by incorporating a floating high side driver for an external N-channel MOSFET switch. It also features a 100kHz fixed frequency oscillator, an internal 2V precision reference, an error amplifier configured for voltage mode operation, and a PWM comparator with latching logic. Complementing the traditional voltage mode control block, the UC3578 incorporates an overcurrent shutdown circuit with full cycle soft re-start to limit the input current to a user defined maximum value during overload operation.Additional functions include an under voltage lockout circuit to insure that sufficient input supply voltage is present before any switching activity can occur.

The UC2578 and the UC3578 are both available in surface mount and thru-hole power packages.

Key Features

  • Provides Simple Single Inductor Buck PWM Step-Down Voltage Regulation
  • Drives External High Side NMOS Switch
  • 14V to 72V Input Voltage Operating Range
  • Contains 100kHz Internal Oscillator, 2V Reference and UVLO
  • Soft Start on Power Up
  • Overcurrent Shutdown Followed by Soft Start
  • Technical Attributes

    Description
    Value
    Find similar Parts
    MSL Level
    2
    Type
    Step Down
    Max Processing Temp
    260
    Operating Temperature
    -40 to 85 °C
    Mounting
    Surface Mount
    Pin Count
    16
    Screening Level
    Industrial
    Lead Finish
    Gold
    Supplier Package
    SOIC
    Product Dimensions
    10 x 4 x 1.5 mm
    Operating Supply Voltage
    14 to 72 V
    Number of Outputs
    1
    Input Voltage
    14 to 72 V

    ECCN / UNSPSC

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

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