LM2575S-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575S-ADJ is a SIMPLE SWITCHER step-down voltage regulator from the LM2575 series, manufactured by National Semiconductor. It operates with an input voltage range of 4V to 40V and provides an adjustable output voltage from 1.23V to 37V. The device delivers a maximum output current of 1A with a switching frequency of 52kHz. It features internal fixed oscillators for minimal external component requirements and includes comprehensive protection circuits such as current limiting and thermal shutdown. The component is housed in a TO-263 surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated fixed oscillator eliminates the need for external timing components
• Internal current limit and thermal shutdown provide robust circuit protection
• Adjustable output voltage allows flexible design configurations
• High efficiency reduces heat dissipation requirements

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulators for linear regulators
• Battery chargers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix matches the specific manufacturer designation, as National Semiconductor products may carry different suffixes compared to Texas Instruments equivalents. Confirm the package type is TO-263 and ensure the ADJ variant is selected for adjustable output applications. Check RoHS compliance status if required for specific manufacturing standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an input voltage up to 40V is required with an adjustable output. It is suitable for designs needing 1A output current with high efficiency. Consider the TO-263 package for surface-mount assembly. Ensure the application does not require the higher input voltage capabilities of the HV series variants.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of switching regulators, which are designed as replacements for traditional three-terminal linear regulators. The S suffix indicates a surface-mount TO-263 package. The ADJ designation specifies the adjustable output version, distinguishing it from fixed voltage outputs like 5V or 12V.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2575S-ADJ/NOPB is a direct equivalent from Texas Instruments. Verify pin compatibility and thermal characteristics when substituting.