LM2596SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2596SX-5.0/NOPB is a SIMPLE SWITCHER step-down voltage regulator from Texas Instruments, operating at a fixed 150 kHz switching frequency. It provides a fixed 5V output with a maximum load current of 3A. The device accepts an input voltage range of 4.5V to 40V and features ±4% output voltage tolerance. Packaged in a TO-263-5 (D²PAK) surface-mount housing, it integrates internal frequency compensation and a fixed-frequency oscillator. Key protection mechanisms include thermal shutdown and current limiting, ensuring reliable operation within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation for simplified design
• Includes built-in thermal shutdown and current limiting protection circuits
• Features an external shutdown pin enabling low-power standby mode

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Pre-regulators for linear regulators
• Efficient buck converters for battery-powered applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free composition and RoHS compliance per Texas Instruments specifications. Confirm the package marking matches the TO-263-5 physical dimensions. Ensure the part number corresponds to the fixed 5.0V output variant rather than adjustable or other voltage versions. Cross-reference the manufacturer date code and lot traceability against official TI documentation to guarantee component authenticity and quality standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from an input voltage between 4.5V and 40V. It is suitable for designs needing up to 3A continuous load current with minimal external components. Consider the TO-263-5 package for adequate thermal dissipation in surface-mount layouts. Verify that the 150 kHz switching frequency aligns with the available standard inductor sizes for the specific application constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2596 series of SIMPLE SWITCHER regulators, which are monolithic integrated circuits designed for step-down conversion. The series offers fixed output voltages including 3.3V, 5V, and 12V, alongside an adjustable version. The LM2596SX-5.0/NOPB specifically denotes the surface-mount variant with a fixed 5V output, utilizing the D²PAK package for high-current handling and ease of integration into compact power management solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2596S-5.0/NOPB: Direct equivalent with identical electrical specifications and fixed 5V output.

Voltage Regulators - DC DC Switching Regulators FAQ

How does the ON/OFF pin function?

The ON/OFF pin enables external shutdown control; grounding this pin turns off the regulator, reducing quiescent current to approximately 80µA.

What is the typical efficiency of this regulator?

The LM2596SX-5.0/NOPB achieves high efficiency, typically around 80%, depending on input voltage, output current, and external component selection.