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LM2595T-3.3 Datasheet(PDF) 1 Page - Texas Instruments |
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LM2595T-3.3 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 41 page LM2595 www.ti.com SNVS122B – MAY 1999 – REVISED APRIL 2013 LM2595 SIMPLE SWITCHER® Power Converter 150 kHz 1A Step-Down Voltage Regulator Check for Samples: LM2595 1 FEATURES DESCRIPTION The LM2595 series of regulators are monolithic 23 • 3.3V, 5V, 12V, and Adjustable Output Versions integrated circuits that provide all the active functions • Adjustable Version Output Voltage Range, for a step-down (buck) switching regulator, capable of 1.2V to 37V ±4% Max Over Line and Load driving a 1A load with excellent line and load Conditions regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output • Available in TO-220 and TO-263 (Surface version. Mount) Packages • Ensured 1A Output Load Current Requiring a minimum number of external components, these regulators are simple to use and • Input Voltage Range Up to 40V include internal frequency compensation†, and a • Requires Only 4 External Components fixed-frequency oscillator. • Excellent Line and Load Regulation The LM2595 series operates at a switching frequency Specifications of 150 kHz thus allowing smaller sized filter • 150 kHz Fixed Frequency Internal Oscillator components than what would be needed with lower • TTL Shutdown Capability frequency switching regulators. Available in a standard 5-lead TO-220 package with several • Low Power Standby Mode, IQ Typically 85 μA different lead bend options, and a 5-lead TO-263 • High Efficiency surface mount package. Typically, for output voltages • Uses Readily Available Standard Inductors less than 12V, and ambient temperatures less than 50°C, no heat sink is required. • Thermal Shutdown and Current Limit Protection A standard series of inductors are available from several different manufacturers optimized for use with APPLICATIONS the LM2595 series. This feature greatly simplifies the design of switch-mode power supplies. • Simple High-Efficiency Step-Down (Buck) Regulator Other features include an ensured ±4% tolerance on output voltage under specified input voltage and • Efficient Pre-Regulator for Linear Regulators output load conditions, and ±15% on the oscillator • On-Card Switching Regulators frequency. External shutdown is included, featuring • Positive to Negative Converter typically 85 μA stand-by current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions. † Patent Number 5,382,918. Typical Application (Fixed Output Voltage Versions) Connection Diagrams 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, Switchers Made Simple are registered trademarks 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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