Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2575IN Datenblatt(PDF) 1 Page - Texas Instruments |
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LM2575IN Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 10 page www.ti.com FEATURES APPLICATIONS 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 NC NC OUTPUT NC GND NC FEEDBACK NC VIN NC NC GND GND NC NC ON/OFF N (PDIP) PACKAGE (TOP VIEW) NC − No internal connection DESCRIPTION/ORDERING INFORMATION LM2575 1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR SLVS569E – JANUARY 2005 – REVISED JANUARY 2006 • Simple High-Efficiency Step-Down (Buck) • Adjustable With a Range of 1.23 V to 37 V and Regulator ±4% Regulation (Max) Over Line, Load, and • Pre-Regulator for Linear Regulators Temperature Conditions • On-Card Switching Regulators • Specified 1-A Output Current • Positive-to-Negative Converter (Buck-Boost) • Wide Input Voltage Range …4.75 V to 40 V • Uses Readily Available Standard Inductors • 52-kHz (Typ) Fixed-Frequency Internal Oscillator • TTL Shutdown Capability With 50- µA (Typ) Standby Current • High Efficiency …as High as 88% (Typ) • Thermal Shutdown and Current-Limit Protection With Cycle-by-Cycle Current Limiting • For the Full Offering of Voltages (Including Fixed-Output Options) and Packages (Including TO-263), see TL2575 Datasheet The LM2575 greatly simplifies the design of switching power supplies by conveniently providing all the active functions needed for a step-down (buck) switching regulator in an integrated circuit. Accepting a wide input voltage range and available in an adjustable output version, the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown is available via an external ON/OFF pin. The LM2575 represents a superior alternative to popular three-terminal linear regulators. Due to its high efficiency, it significantly reduces the size of the heat sink and, in many cases, no heat sink is required. Optimized for use with standard series of inductors available from several different manufacturers, the LM2575 greatly simplifies the design of switch-mode power supplies by requiring a minimal addition of only four to six external components for operation. The LM2575 is characterized for operation over the virtual junction temperature range of –40 °C to 125°C. ORDERING INFORMATION VO TJ PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING (NOM) –40 °C to 125°C ADJ PDIP – N Tube of 25 LM2575IN LM2575IN (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2006, 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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