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LM2594MX-3.3 Datasheet(PDF) 1 Page - Texas Instruments |
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LM2594MX-3.3 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 41 page LM2594, LM2594HV www.ti.com SNVS118C – DECEMBER 1999 – REVISED APRIL 2013 LM2594/LM2594HV SIMPLE SWITCHER® Power Converter 150 kHz 0.5A Step-Down Voltage Regulator Check for Samples: LM2594, LM2594HV 1 FEATURES DESCRIPTION The LM2594/LM2594HV series of regulators are 2345 • 3.3V, 5V, 12V, and Adjustable Output Versions monolithic integrated circuits that provide all the • Adjustable Version Output Voltage Range, active functions for a step-down (buck) switching 1.2V to 37V (57V for the HV Version)±4% Max regulator, capable of driving a 0.5A load with Over Line and Load Conditions excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, • Available in 8-pin Surface Mount SOIC and and an adjustable output version, and are packaged PDIP-8 Package in a 8-lead PDIP and a 8-lead surface mount SOIC • Ensured 0.5A Output Current package. • Input Voltage Range up to 60V Requiring a minimum number of external • Requires only 4 External Components components, these regulators are simple to use and • 150 kHz Fixed Frequency Internal Oscillator feature internal frequency compensation†, a fixed- frequency oscillator, and improved line and load • TTL Shutdown Capability regulation specifications. • Low Power Standby Mode, IQ typically 85 μA The LM2594/LM2594HV series operates at a • High Efficiency switching frequency of 150 kHz thus allowing smaller • Uses Readily Available Standard Inductors sized filter components than what would be needed • Thermal Shutdown and Current Limit with lower frequency switching regulators. Because of Protection its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed. APPLICATIONS A standard series of inductors (both through hole and • Simple High-efficiency Step-down (Buck) surface mount types) are available from several Regulator different manufacturers optimized for use with the • Efficient Pre-regulator for Linear Regulators LM2594/LM2594HV series. This feature greatly • On-card Switching Regulators simplifies the design of switch-mode power supplies. • Positive to Negative Convertor Other features include an ensured ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 85 μA standby 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. The LM2594HV is for applications requiring an input voltage up to 60V. 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 Switchers Made Simple is a trademark of Texas Instruments. 3 SIMPLE SWITCHER is a registered trademark of Texas Instruments. 4 Switchers Made Simple is a registered trademark of dcl_owner. 5 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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