LM2575IN

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575IN is a 1-A simple step-down switching voltage regulator manufactured by Texas Instruments. It operates with an input voltage range from 4.75 V to 40 V and provides fixed output voltages of 3.3 V, 5 V, 12 V, or 15 V, alongside an adjustable version. The device integrates a 330 mΩ power MOSFET and features a switching frequency of approximately 52 kHz. It utilizes voltage-mode control and includes thermal shutdown and current limit protection. The component is housed in a 16-pin PDIP package and supports operation temperatures from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage 330 mΩ N-channel MOSFET for efficient step-down conversion
• Includes internal compensation and fixed-frequency oscillation for simplified design
• Provides thermal shutdown and cycle-by-cycle current limiting for robust protection

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring buck conversion
• Pre-regulators for switching regulators
• Efficient on-card regulation architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., IN) confirms the 16-pin PDIP package and fixed output variant. Confirm RoHS compliance status as indicated by the datasheet revision. Ensure the supplier source aligns with Texas Instruments authorized distribution channels to guarantee authenticity and traceability for industrial applications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a single-ended 1 A buck converter is required with an input voltage up to 40 V. The fixed output versions simplify external component selection compared to the adjustable variant. Consider the PDIP package constraints for thermal management and PCB space availability relative to surface-mount alternatives like TO-220 or DPAK.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of SIMPLE SWITCHER regulators. It serves as a monolithic integrated circuit designed to simplify the implementation of step-down switching converters. The family offers various output voltage options and packaging styles to accommodate different power and form factor requirements in power management designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible replacements within the same family include LM2575-3.3IN, LM2575-12IN, and LM2575ADJIN. Verify that the substitute maintains the same 16-pin PDIP footprint and electrical characteristics such as the 1 A output current capability and 40 V maximum input rating.