Datasheet4U Logo Datasheet4U.com

LM1577 Datasheet Simple Switcher Step-up Voltage Regulator

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM1577/LM2577 Series SIMPLE SWITCHER Step-Up Voltage Regulator June 1999 LM1577/LM2577 Series SIMPLE SWITCHER ® Step-Up Voltage.

This datasheet includes multiple variants, all published together in a single manufacturer document.

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.

Key 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.

LM1577 Distributor