See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

KTT | 5

Temp:

Q (-40 to 125)

ECO Plan:

Pb-Free (RoHS Exempt)

LM2577S-ADJ/NOPB


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

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Texas Instruments LM2577S-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.

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