UC2577TDKTTT-ADJ by Texas Instruments | DC to DC Converters | Avnet ASIA
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UC2577TDKTTT-ADJ

Texas Instruments

Conv DC-DC Single Step Up 3V to 40V 6-Pin(5+Tab) TO-263 T/R

Manufacturer Part #: UC2577TDKTTT-ADJ

Alternate Part #: UC2577TDKTTT-ADJ


RoHS Compliant

Descriptions

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Information

The UC2577-ADJ device provides all the active functions necessary to implement step-up (boost), flyback, and forward converter switching regulators. Requiring only a few components, these simple regulators efficiently provide up to 60V as a step-up regulator, and even higher voltages as a flyback or forward converter regulator.

The UC2577-ADJ features a wide input voltage range of 3.0V to 40V and an adjustable output voltage. An on-chip 3.0A NPN switch is included with undervoltage lockout, thermal protection circuitry, and current limiting, as well as soft start mode operation to reduce current during startup. Other features include a 52kHz fixed frequency on-chip oscillator with no external components and current mode control for better line and load regulation.

A standard series of inductors and capacitors are available from several manufacturers optimized for use with these regulators and are listed in this data sheet.

Key Features

  • Requires Few External Components
  • NPN Output Switches 3.0A, 65V(max)
  • Extended Input Voltage Range: 3.0V to 40V
  • Current Mode Operation for Improved Transient Response, Line Regulation, and Current Limiting
  • Soft Start Function Provides Controlled Startup
  • 52kHz Internal Oscillator
  • Output Switch Protected by Current Limit, Undervoltage Lockout and Thermal Shutdown
  • Improved Replacement for LM2577-ADJ Series
  • TYPICAL APPLICATIONS
    • Simple Boost and Flyback Converters
    • SEPIC Topology Permits Input Voltage to be Higher or Lower than Output Voltage
    • Transformer Coupled Forward Regulators
    • Multiple Output Designs
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Pin Count
    6
    MSL Level
    2
    Efficiency
    80 %
    Product Dimensions
    10.16 x 8.42 x 4.58 mm
    Max Processing Temp
    260
    Lead Finish
    Tin
    Switching Regulator
    Yes
    Output Type
    Adjustable
    Maximum Output Current
    3 A
    Mounting
    Surface Mount
    Line Regulation
    0.5 mV
    Maximum Input Voltage
    40 V
    Operating Temperature
    -40 to 125 °C
    Minimum Input Voltage
    3 V
    Output Voltage
    0 to 60 V
    Type
    Step Up
    Supplier Package
    TO-263
    Operating Supply Voltage
    3 to 40 V
    Number of Outputs
    1
    Switching Frequency
    56 kHz

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542390000

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