GENERAL DESCRIPTION
The TC2575 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 1.0A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V, 12V, and an adjustable output version.

FEATURES
■ 3.3V, 5.0V, 12V, and Adjustable Output Versions
■ Adjustable Version Output Voltage Range of 1.23V to 37V ±4% Max. Over Line and Load Conditions
■ Guaranteed 1.0 A Output Current
■ Wide Input Voltage Range; 4.75V to 40V
■ Requires Only 4 External Components
■ 52kHz 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 and High-Efficiency Step-Down (Buck) Regulator
■ 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