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UC2577-ADJ

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· Ou...

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SeekIC No. : 004535428 Detail

UC2577-ADJ: 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, ...

UC2577-ADJ Data Sheet

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Part Number:
UC2577-ADJ
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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 hutdown
· Improved Replacement for LM2577-ADJ Series



Application

· 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


Pinout

Connection Diagram


Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 45V
Output Switch Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 65V
Output Switch Current (Note 2) . . . . . . . . . . . . . . . . . . .  . 6.0A
Power Dissipation. . . . . . . . . . . . . . . . . . . . .  Internally Limited
Storage Temperature Range . . . . . . . . . . . .-65°C to +150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . .  . 260°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . 150°C
Minimum ESD Rating (C = 100pF, R = 15k) . . . . . . . . . . . 2kV


Description

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

The UC2577-ADJ features a wide input voltage range of 3.0V to 0V and an adjustable output voltage. An on-chip 3.0A NPN switch s included with undervoltage lockout, thermal protection circuitry, nd current limiting, as well as soft start mode operation to reduce urrent during startup. Other features include a 52kHz fixed frequency n-chip oscillator with no external components and current ode control for better line and load regulation.

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




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