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1.0 A, Adjustable Output Voltage, Step?Down Switching Regulator

The LM2575 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step?down switching regulator (buck converter). All circuits of this series are capable of driving a 1.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.

Features

? 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions

? Adjustable Version Output Voltage Range of 1.23 V to 37 V ±4 Maximum Over Line and Load Conditions

? Guaranteed 1.0 A Output Current

? Wide Input Voltage Range: 4.75 V to 40 V

? 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

? Moisture Sensitivity Level (MSL) Equals 1

? Pb?Free Packages are Available*

Applications

? Simple and High?Efficiency Step?Down (Buck) Regulators

? Efficient Pre?Regulator for Linear Regulators

? On?Card Switching Regulators

? Positive to Negative Converters (Buck?Boost)

? Negative Step?Up Converters

? Power Supply for Battery Chargers