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LM2575SX-5.0 数据表(PDF) 1 Page - Texas Instruments |
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LM2575SX-5.0 数据表(HTML) 1 Page - Texas Instruments |
1 / 44 page LM1575, LM2575-N, LM2575HV www.ti.com SNVS106E – MAY 1999 – REVISED APRIL 2013 LM1575/LM2575/LM2575HV SIMPLE SWITCHER® 1A Step-Down Voltage Regulator Check for Samples: LM1575, LM2575-N, LM2575HV 1 FEATURES DESCRIPTION The LM2575 series of regulators are monolithic 23 • 3.3V, 5V, 12V, 15V, and Adjustable Output integrated circuits that provide all the active functions Versions for a step-down (buck) switching regulator, capable of • Adjustable Version Output Voltage Range, driving a 1A load with excellent line and load – 1.23V to 37V (57V for HV Version) ±4% regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable Max Over output version. – Line and Load Conditions Requiring a minimum number of external • Specified 1A Output Current components, these regulators are simple to use and • Wide Input Voltage Range, 40V up to 60V for include internal frequency compensation and a fixed- HV Version frequency oscillator. • Requires Only 4 External Components The LM2575 series offers a high-efficiency • 52 kHz Fixed Frequency Internal Oscillator replacement for popular three-terminal linear • TTL Shutdown Capability, Low Power Standby regulators. It substantially reduces the size of the Mode heat sink, and in many cases no heat sink is required. • High Efficiency A standard series of inductors optimized for use with • Uses Readily Available Standard Inductors the LM2575 are available from several different • Thermal Shutdown and Current Limit manufacturers. This feature greatly simplifies the Protection design of switch-mode power supplies. • P+ Product Enhancement Tested Other features include a specified ±4% tolerance on output voltage within specified input voltages and APPLICATIONS output load conditions, and ±10% on the oscillator • Simple High-Efficiency Step-Down (Buck) frequency. External shutdown is included, featuring Regulator 50 μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as • Efficient Pre-Regulator for Linear Regulators thermal shutdown for full protection under fault • On-Card Switching Regulators conditions. • Positive to Negative Converter (Buck-Boost) Typical Application (Fixed Output Voltage Versions) Pin numbers are for the TO-220 package. 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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