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LM1577 Datasheet(PDF) 1 Page - Texas Instruments |
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LM1577 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 42 page LM1577, LM2577 www.ti.com SNOS658D – JUNE 1999 – REVISED APRIL 2013 LM1577/LM2577 SIMPLE SWITCHER® Step-Up Voltage Regulator Check for Samples: LM1577, LM2577 1 FEATURES DESCRIPTION The LM1577/LM2577 are monolithic integrated 23 • Requires Few External Components circuits that provide all of the power and control • NPN Output Switches 3.0A, can Stand off 65V functions for step-up (boost), flyback, and forward • Wide Input Voltage Range: 3.5V to 40V converter switching regulators. The device is available in three different output voltage versions: • Current-mode Operation for Improved 12V, 15V, and adjustable. Transient Response, Line Regulation, and Current Limit Requiring a minimum number of external components, these regulators are cost effective, and • 52 kHz Internal Oscillator simple to use. Listed in this data sheet are a family of • Soft-start Function Reduces In-rush Current standard inductors and flyback transformers designed During Start-up to work with these switching regulators. • Output Switch Protected by Current Limit, Included on the chip is a 3.0A NPN switch and its Under-voltage Lockout, and Thermal associated protection circuitry, consisting of current Shutdown and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator TYPICAL APPLICATIONS that requires no external components, a soft start mode to reduce in-rush current during start-up, and • Simple Boost Regulator current mode control for improved rejection of input • Flyback and Forward Regulators voltage and output load transients. • Multiple-output Regulator Connection Diagrams Figure 1. 5-Lead (Straight Leads) TO-220 (T) – Top Figure 2. 5-Lead (Bent, Staggered Leads) TO-220 View (T) – Top View See Package Number KC See Package Number NDH0005D 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 SIMPLE SWITCHER is a registered trademark of Texas Instruments. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 1999–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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Descripción similar - LM1577_15 |
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