The LM2575 series of regulators are monolithic ? 3.3V, 5V, 12V, 15V, and Adjustable Output integrated circuits that provide all the active functions Versions for a step-down (buck) switching regulator, capable of ? Adjustable Version Output Voltage Range, driving a 1A load with excellent line and load ? 1.23V to 37V (57V for HV Version) ?4% regulation. These devices are available in fixed output Max Over voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. ? Line and Load Conditions ? Specified 1A Output Current Requiring a minimum number of external components, these regulators are simple to use and ? Wide Input Voltage Range, 40V up to 60V for include internal frequency compensation and a fixed- HV Version frequency oscillator.

3.3V, 5V, 12V, 15V, and Adjustable Output integrated circuits that provide all the active functions Versions for a step-down (buck) switching regulator, capable of ? Adjustable Version Output Voltage Range, driving a 1A load with excellent line and load ? 1.23V to 37V (57V for HV Version) ?4% regulation. These devices are available in fixed output Max Over voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. ? Line and Load Conditions ? Specified 1A Output Current Requiring a minimum number of external components, these regulators are simple to use and ? Wide Input Voltage Range, 40V up to 60V for include internal frequency compensation and a fixed- HV Version frequency oscillator. ? Requires Only 4 External Components The LM2575 series offers a high-efficiency ? 52 kHz Fixed Frequency Internal Oscillator replacement for popular three-terminal linear ? TTL Shutdown Capability, Low Power Standby regulators. It substantially reduces the size of the Mode heat sink, and in many cases no heat sink is required. ? High Efficiency ? Uses Readily Available Standard Inductors A standard series of inductors optimized for use with the LM2575 are available from several different ? Thermal Shutdown and Current Limit manufacturers. This feature greatly simplifies the Protection design of switch-mode power supplies. ? P Product Enhancement Tested

The LM2575 series of regulators are monolithic ? 3.3V, 5V, 12V, 15V, and Adjustable Output integrated circuits that provide all the active functions Versions for a step-down (buck) switching regulator, capable of ? Adjustable Version Output Voltage Range, driving a 1A load with excellent line and load ? 1.23V to 37V (57V for HV Version) ?4% regulation. These devices are available in fixed output Max Over voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.

Requires Few External Components circuits that provide all of the power and control ? NPN Output Switches 3.0A, can Stand off 65V functions for step-up (boost), flyback, and forward ? Wide Input Voltage Range: 3.5V to 40V converter switching regulators. The device is available in three different output voltage versions: ? Current-mode Operation for Improved Transient Response, Line Regulation, 12V, 15V, and adjustable. and Current Limit Requiring a minimum number of external ? 52 kHz Internal Oscillator components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of ? Soft-start Function Reduces In-rush Current standard inductors and flyback transformers designed During Start-up to work with these switching regulators. ? Output Switch Protected by Current Limit, Included on the chip is a 3.0A NPN switch and its Under-voltage Lockout, and Thermal associated protection circuitry, consisting of current Shutdown

These circuits consist of two independent, highgain, internally frequency-compensated op amps, specifically designed to operate from a single power supply over a wide range of voltages. The low-power supply drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, DC gain blocks and all the conventional op amp circuits, which can now be more easily implemented in single power supply systems. For example, these circuits can be directly supplied with the standard 5 V, which is used in logic systems and will easily provide the required interface electronics with no additional power supply.