LM2596S-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2596S-5.0 is a SIMPLE SWITCHER power converter from Texas Instruments, functioning as a fixed-frequency step-down voltage regulator. It operates at a nominal switching frequency of 150 kHz and supports a maximum output current of 3 A. The device accepts an input voltage range from 4.5 V to 40 V and provides a fixed 5.0 V output with ±4% tolerance. Designed for surface-mount installation in TO-263 packages, it integrates internal frequency compensation and a fixed-frequency oscillator. Key electrical specifications include a minimum input voltage of 4.5 V, a maximum input voltage of 40 V, and an operating junction temperature range from -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency oscillator and internal frequency compensation to minimize external component count.
• Includes built-in thermal shutdown and current limit protection circuits for enhanced reliability.
• Features a TTL-compatible shutdown pin that reduces standby current to typically 80 µA.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power systems requiring efficient buck conversion
• Pre-regulator circuits for switching regulators
• Direct regulation from bus lines

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' indicates lead-free status and RoHS compliance when sourcing. Confirm package type matches the required footprint, as variations exist between standard and tape-and-reel options. Ensure the supplier provides official datasheets to validate the 3 A current rating and 150 kHz switching frequency specifications before integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a simple, high-efficiency buck topology with minimal external parts. It is suitable for designs needing a stable 5 V rail from higher voltage inputs up to 40 V. Consider thermal management requirements for loads approaching the 3 A limit, as heat dissipation depends on PCB copper area and ambient conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2596 series of SIMPLE SWITCHER converters, originally developed by National Semiconductor and now manufactured by Texas Instruments. The series includes variants with fixed outputs of 3.3 V, 12 V, and adjustable versions. The LM2596S-5.0 specifically targets the 5 V output requirement within this family of monolithic integrated circuit step-down regulators.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include LM2596SX-5.0/NOPB and LM2596S-5.0/NOPB. These variants maintain identical electrical characteristics and functionality while differing primarily in packaging format or manufacturing origin details.