LM2577T-ADJ/NOPB

text.skipToContent text.skipToNavigation

LM2577T-ADJ/NOPB

SIMPLE SWITCHER® 3.5V to 40V, 3A Low Component Count Step-Up Regulator

Packaging

Package | PIN: KC | 5
Temp: Q (-40 to 125)
Carrier: Partial Tube
Qty Price
1-9 $5.62
10-24 $5.05
25-99 $4.72
100-249 $4.23
250-499 $3.95
500-749 $3.44
750-999 $2.98
1000+ $2.92

Features

  • Requires Few External Components
  • NPN Output Switches 3.0A, can Stand off 65V
  • Wide Input Voltage Range: 3.5V to 40V
  • Current-mode Operation for Improved Transient Response, Line Regulation, and Current Limit
  • 52 kHz Internal Oscillator
  • Soft-start Function Reduces In-rush Current During Start-up
  • Output Switch Protected by Current Limit, Under-voltage Lockout, and Thermal Shutdown

All trademarks are the property of their respective owners.

Texas Instruments  LM2577T-ADJ/NOPB

The LM1577/LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), flyback, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.

Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and flyback transformers designed to work with these switching regulators.

Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.