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LM2577 - SIMPLE SWITCHER Step-Up Voltage Regulator

This page provides the datasheet information for the LM2577, a member of the LM2 SIMPLE SWITCHER Step-Up Voltage Regulator family.

Datasheet Summary

Description

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.

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. 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 n 52 kHz internal oscillator n Soft-start functi.

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Datasheet Details

Part number LM2577
Manufacturer National Semiconductor
File Size 889.65 KB
Description SIMPLE SWITCHER Step-Up Voltage Regulator
Datasheet download datasheet LM2577 Datasheet
Additional preview pages of the LM2577 datasheet.

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Full PDF Text Transcription

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LM1577/LM2577 Series SIMPLE SWITCHER Step-Up Voltage Regulator June 1999 LM1577/LM2577 Series SIMPLE SWITCHER ® Step-Up Voltage Regulator General Description 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.
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