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LM2577 - SIMPLE SWITCHER Step-Up Voltage Regulator

Download the LM2577 datasheet PDF. This datasheet also covers the LM2 variant, as both devices belong to the same simple switcher step-up voltage regulator family and are provided as variant models within a single manufacturer datasheet.

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.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM2-577.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM2577 Step-Up Voltage Regulator Texas Instruments
LM2574 Step-Down Switching Regulator ON Semiconductor
LM2574 52kHz Simple 0.5A Buck Regulator Micrel Semiconductor
LM2574 0.5-A Step-Down Voltage Regulator Texas Instruments
LM2574 STEP-DOWN VOLTAGE REGULATOR Motorola

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM2574 SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator
LM2574HV SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator
LM2575 1A Step-Down Voltage Regulator
LM2575HV SIMPLE SWITCHER 1A Step-Down Voltage Regulator
LM2576 SIMPLE SWITCHER 3A Step-Down Voltage Regulator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.