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LM2674N-5.0 Datasheet(PDF) 1 Page - Texas Instruments |
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LM2674N-5.0 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page LM2674 www.ti.com SNVS007F – SEPTEMBER 1998 – REVISED APRIL 2013 LM2674 SIMPLE SWITCHER® Power Converter High Efficiency 500 mA Step-Down Voltage Regulator Check for Samples: LM2674 1 FEATURES DESCRIPTION The LM2674 series of regulators are monolithic 234 • Efficiency up to 96% integrated circuits built with a LMDMOS process. • Available in SOIC-8, 8-Pin PDIP and WSON These regulators provide all the active functions for a Packages step-down (buck) switching regulator, capable of • Computer Design Software LM267X Made driving a 500 mA load current with excellent line and load regulation. These devices are available in fixed Simple (Version 6.0) output voltages of 3.3V, 5.0V, 12V, and an adjustable • Simple and Easy to Design With output version. • Requires Only 5 External Components Requiring a minimum number of external • Uses Readily Available Standard Inductors components, these regulators are simple to use and • 3.3V, 5.0V, 12V, and Adjustable Output include patented internal frequency compensation Versions (Patent Nos. 5,382,918 and 5,514,947) and a fixed frequency oscillator. • Adjustable Version Output Voltage Range: 1.21V to 37V The LM2674 series operates at a switching frequency • ±1.5% Max Output Voltage Tolerance Over of 260 kHz, thus allowing smaller sized filter components than what would be needed with lower Line and Load Conditions frequency switching regulators. Because of its very • Guaranteed 500mA Output Load Current high efficiency (>90%), the copper traces on the • 0.25 Ω DMOS Output Switch printed circuit board are the only heat sinking needed. • Wide Input Voltage Range: 8V to 40V A family of standard inductors for use with the • 260 kHz Fixed Frequency Internal Oscillator LM2674 are available from several different manufacturers. This feature greatly simplifies the • TTL Shutdown Capability, Low Power Standby design of switch-mode power supplies using these Mode advanced ICs. Also included in the datasheet are • Thermal Shutdown and Current Limit selector guides for diodes and capacitors designed to Protection work in switch-mode power supplies. TYPICAL APPLICATIONS • Simple High Efficiency (>90%) Step-Down (Buck) Regulator • Efficient Pre-Regulator for Linear Regulators • Positive-to-Negative Converter Typical Application 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 Windows is a registered trademark of Microsoft Corporation. 4 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 1998–2013, 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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