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.
●Features
●• 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
●Applications
●• Simple High-Efficiency Step-Down (Buck) Regulator
●• Efficient Preregulator for Linear Regulators
●• On-Card Switching Regulators
●• Positive-to-Negative Converter (Buck-Boost)
