LM2576T-15

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576T-15 is a monolithic integrated circuit from the SIMPLE SWITCHER series, functioning as a 3A step-down (buck) switching voltage regulator. It operates with an input voltage range of 4V to 40V and provides a fixed 15V output. The device utilizes a fixed-frequency internal oscillator operating at 52 kHz. Key electrical specifications include a maximum output current of 3A, a typical quiescent current of 5mA, and a guaranteed output voltage tolerance of ±4%. It supports an operating temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency 52 kHz oscillator for simplified design
• Includes internal frequency compensation requiring minimal external components
• Features cycle-by-cycle current limiting and thermal shutdown protection

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulators for switching post-regulator linear regulators
• Efficient step-down converters from standard 12V or 24V buses

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer source carefully, as this component type is produced by multiple vendors including Texas Instruments, ON Semiconductor, and others. Confirm the specific suffix indicates lead-free (NOPB) compliance if required. Ensure the package matches the TO-220-5 through-hole specification. Check for obsolescence notices as older revisions may be discontinued by certain manufacturers.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a fixed 15V output is required from an input voltage up to 40V. It serves as a high-efficiency replacement for three-terminal linear regulators, reducing heat sink requirements. Consider the 52 kHz switching frequency for inductor selection. Verify that the 3A load capability meets the application demands without exceeding thermal limits in the chosen enclosure.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2576 family of SIMPLE SWITCHER regulators. It shares architectural similarities with other members like the LM2576-5.0 and LM2576-12, differing primarily in the fixed output voltage setting. The 'T' suffix denotes the TO-220-5 through-hole package variant, distinguishing it from surface-mount options like the LM2576S series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-compatible substitutes include LM2576T-15/NOPB and equivalents from other manufacturers such as ON Semiconductor's LM2576T-15. Cross-reference datasheets for minor variations in thermal resistance or exact switching frequency tolerances between different production sources.