LM2575SX-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2575SX-3.3 is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, designed for high-efficiency DC-DC conversion. It operates with an input voltage range of 4.75 V to 40 V and provides a fixed 3.3 V output at up to 1 A load current. The device integrates a 150 kHz switching frequency, enabling the use of compact external components. Packaged in TO-263-5 (D²PAK), it supports surface-mount installation and functions within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch rated for 1 A continuous output current
• Fixed internal feedback network ensures precise 3.3 V output regulation
• Built-in thermal shutdown and current limit protection mechanisms
• Requires minimal external passive components for standard buck topology

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Efficient conversion from higher bus voltages to 3.3 V logic levels
• Battery-powered equipment requiring extended runtime through high efficiency
• Industrial control modules needing robust voltage stabilization

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and electrical tolerances. Ensure the procurement channel sources genuine components to avoid counterfeit risks associated with high-demand power management ICs. Cross-reference the manufacturer part number with the latest datasheet revision to validate package dimensions and marking codes before integration into production designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from an input source between 4.75 V and 40 V. The 150 kHz switching frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the TO-263-5 package for its thermal performance in surface-mount applications where heat dissipation is critical without additional heatsinking infrastructure.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2575 family of SIMPLE SWITCHER regulators, known for simplifying power supply design. It serves as a direct replacement for older linear regulators in applications where efficiency and thermal management are priorities. The series includes adjustable and various fixed voltage variants, catering to diverse industrial and commercial power distribution needs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2575S-3.3/NOPB and LM2575S-3.3 from National Semiconductor or Texas Instruments. Verify that alternative packages maintain identical pin configurations and thermal characteristics to ensure seamless board-level interchangeability without redesigning the footprint.