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LM2671M-3.3 датащи(PDF) 1 Page - Texas Instruments |
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LM2671M-3.3 датащи(HTML) 1 Page - Texas Instruments |
1 / 31 page LM2671 www.ti.com SNVS008K – SEPTEMBER 1998 – REVISED APRIL 2013 LM2671 SIMPLE SWITCHER® Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features Check for Samples: LM2671 1 FEATURES 234 • Efficiency up to 96% DESCRIPTION The LM2671 series of regulators are monolithic • Available in SOIC, 8-pin PDIP and WSON integrated circuits built with a LMDMOS process. Packages These regulators provide all the active functions for a • Computer Design Software LM267X Made step-down (buck) switching regulator, capable of Simple (version 6.0) driving a 500mA load current with excellent line and • Simple and Easy to Design With load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V, 12V, and an adjustable • Requires Only 5 external Components output version. • Uses Readily Available Standard Inductors Requiring a minimum number of external • 3.3V, 5.0V, 12V, and Adjustable Output components, these regulators are simple to use and Versions include patented internal frequency compensation • Adjustable Version Output Voltage Range: (Patent Nos. 5,382,918 and 5,514,947), fixed 1.21V to 37V frequency oscillator, external shutdown, soft-start, and frequency synchronization. • ±1.5% Max Output Voltage Tolerance Over Line and Load Conditions The LM2671 series operates at a switching frequency • Ensured 500mA Output Load Current of 260 kHz, thus allowing smaller sized filter components than what would be needed with lower • 0.25 Ω DMOS Output Switch frequency switching regulators. Because of its very • Wide Input Voltage Range: 8V to 40V high efficiency (>90%), the copper traces on the • 260 kHz Fixed Frequency Internal Oscillator printed circuit board are the only heat sinking needed. • TTL Shutdown Capability, Low Power Standby A family of standard inductors for use with the Mode LM2671 are available from several different manufacturers. This feature greatly simplifies the • Soft-Start and Frequency Synchronization design of switch-mode power supplies using these • Thermal Shutdown and Current Limit advanced ICs. Also included in the datasheet are Protection selector guides for diodes and capacitors designed to work in switch-mode power supplies. APPLICATIONS Other features include a ensured ±1.5% tolerance on • Simple High Efficiency (>90%) Step-Down output voltage within specified input voltages and (Buck) Regulator output load conditions, and ±10% on the oscillator • Efficient Pre-Regulator for Linear Regulators frequency. External shutdown is included, featuring typically 50 μA stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions. To simplify the LM2671 buck regulator design procedure, there exists computer design software, LM267X Made Simple (version 6.0). 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, WEBENCH are registered trademarks 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. |
Аналогичный номер детали - LM2671M-3.3 |
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Аналогичное описание - LM2671M-3.3 |
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