LM2574

Product Folder Order Now Technical Documents Tools & Software Support & Community LM2574, LM2574HV SNVS104E – JUNE 1999 – REVISED JULY 2018 LM2574x SIMPLE SWITCHER® 0.5-A Step-Down Voltage Regulator 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 Create a Custom Design Using the LM2574 With the WEBENCH® Power Designer 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 fixedfrequenc...