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LM2574N-ADJ/NOPB Datasheet(PDF) 1 Page - Texas Instruments |
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LM2574N-ADJ/NOPB Datasheet(HTML) 1 Page - Texas Instruments |
1 / 38 page Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM2574, LM2574HV SNVS104D – JUNE 1999 – REVISED APRIL 2016 LM2574x SIMPLE SWITCHER® 0.5-A Step-Down Voltage Regulator 1 1 Features 1 • 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions • Adjustable Version Output Voltage Range: 1.23 V to 37 V (57 V for HV version) ±4% Maximum Over Line and Load Conditions • Specified 0.5-A Output Current • Wide Input Voltage Range: 40 V, up to 60 V for HV Version • Requires Only 4 External Components • 52-kHz Fixed-Frequency Internal Oscillator • TTL Shutdown Capability, Low-Power Standby Mode • High Efficiency • Uses Readily Available Standard Inductors • Thermal Shutdown and Current-Limit Protection 2 Applications • Simple High-Efficiency Step-Down (Buck) Regulator • Efficient Preregulator for Linear Regulators • On-Card Switching Regulators • Positive-to-Negative Converter (Buck-Boost) 3 Description The LM2574xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed- frequency oscillator. The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50- μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM2574, LM2574HV SOIC (14) 8.992 mm × 7.498 mm PDIP (8) 6.35 mm × 9.81 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application (Fixed Output Voltage Versions) |
Similar Part No. - LM2574N-ADJ/NOPB |
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Similar Description - LM2574N-ADJ/NOPB |
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