LM2587SX-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587SX-5.0/NOPB is a SIMPLE SWITCHER® 5A Flyback Regulator from Texas Instruments, designed for flyback, boost, and forward converter applications. It features a wide input voltage range of 4V to 40V and provides a fixed 5.0V output. The device integrates a 5.0A, 65V NPN power switch with current-mode control, internal soft-start, and thermal shutdown protection. Operating at a fixed 100 kHz switching frequency, it utilizes the TO-263-5 (D2PAK) surface-mount package. The regulator ensures ±4% system output voltage tolerance under specified conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 5.0A, 65V NPN power switch for high-current handling capabilities
• Employs current-mode control architecture to improve transient response and line regulation
• Includes internal soft-start circuitry to limit inrush current during startup
• Features comprehensive protection mechanisms including thermal shutdown and undervoltage lockout

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs requiring isolated or non-isolated outputs
• Boost converter topologies for step-up voltage regulation
• Forward converter applications in industrial power supplies
• General-purpose DC-DC conversion within the 4V to 40V input range

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure the ordering part number matches the required package type and temperature rating. Cross-reference datasheet revisions to validate performance parameters before integration into final designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a robust 5A switching capability with minimal external component count. The fixed 5.0V output simplifies design for standard logic levels. Consider the TO-263-5 package for adequate thermal dissipation in space-constrained PCB layouts without sacrificing current capacity.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2587 SIMPLE SWITCHER family, which includes adjustable and fixed voltage variants such as the LM2587S-ADJ and LM2587S-12. These regulators are engineered for cost-effective, high-efficiency power solutions. The series is characterized by its simplicity, requiring few external components while delivering reliable performance across a wide operating temperature range.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible substitutes include other LM2587 variants like the LM2587S-5.0/NOPB or LM2587T-5.0/NOPB, depending on the required package style. Verify that alternative parts maintain the same 5A current rating and 100 kHz switching frequency to ensure circuit stability.