LM2576SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576SX-5.0/NOPB is a Texas Instruments SIMPLE SWITCHER® monolithic step-down voltage regulator in the TO-263-5 package. It delivers a fixed 5V output with a maximum load current of 3A. The device operates from an input voltage range of 4V to 40V and features a fixed internal switching frequency of 52kHz. Designed for high efficiency, it typically replaces three-terminal linear regulators, significantly reducing heat sink requirements. The integrated oscillator ensures stable operation across a wide temperature range.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator for simplified design
• Includes thermal shutdown and current limit protection
• Supports external shutdown via TTL-compatible control signal

Voltage Regulators - DC DC Switching Regulators Applications

• Simple and efficient step-down switching regulators
• Pre-regulators for board-level switching regulators
• Positive-to-negative converter implementations

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the part number includes the /NOPB suffix to ensure compliance with RoHS standards and confirm current availability status, as non-NOPB variants may be discontinued. Cross-reference the manufacturer datasheet for specific ordering information and packaging details to ensure compatibility with your supply chain requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from an input voltage between 4V and 40V. It is suitable for applications needing up to 3A load current where high efficiency and minimal external components are priorities. Consider the TO-263-5 package for surface-mount assembly and adequate thermal management capabilities.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the SIMPLE SWITCHER® family of buck converters, known for ease of use and robust performance. The LM2576 series provides fixed output voltages including 3.3V, 5V, 12V, and 15V, alongside adjustable versions. The SX variant specifically denotes the surface-mount D2PAK (TO-263) package format.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576S-5.0

Voltage Regulators - DC DC Switching Regulators FAQ

What is the typical switching frequency?

The internal oscillator operates at a fixed frequency of 52 kHz.

Does the device support external shutdown?

Yes, it features an external shutdown pin compatible with TTL logic levels.