LM2587S-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587S-5.0/NOPB is a SIMPLE SWITCHER 5A flyback regulator from Texas Instruments, originally developed by National Semiconductor. It operates with an input voltage range of 4V to 40V and provides a fixed 5.0V output. The device features current-mode control for improved transient response and line regulation. Key electrical parameters include a 100 kHz switching frequency, 5.0A switch current capability, and ±4% output voltage tolerance. It is housed in a TO-263 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Current-mode control architecture enhances stability and simplifies compensation design
• Integrated soft-start function limits inrush current during startup
• Built-in thermal shutdown and cycle-by-cycle current limiting protect the device
• Wide input voltage range supports various power supply configurations

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs for isolated power supplies
• Boost converter applications requiring high step-up ratios
• Forward converter topologies for medium-power systems
• Distributed power architectures with wide input ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as National Semiconductor is now part of Texas Instruments. Confirm the suffix NOPB indicates lead-free/RoHS compliance. Ensure the specific voltage variant matches the required output. Check for obsolescence notices or recommended new replacements if sourcing from legacy channels.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a robust 5A flyback solution with minimal external components. The fixed 5.0V output suits standard logic levels. Consider the TO-263 package for thermal management. Verify that the 100 kHz frequency aligns with your magnetic component size constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2587 series was introduced by National Semiconductor as a high-current switching regulator family. Texas Instruments acquired National Semiconductor, continuing production under the TI brand. The LM2587 complements the LM2586 (3A) and LM2588 (5A with shutdown) in the SIMPLE SWITCHER portfolio.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587S-5.0/NOPB is the direct lead-free equivalent. LM2587T-5.0/NOPB offers the same functionality in a TO-220 through-hole package.