LM2587S-5.0

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587S-5.0/NOPB is a SIMPLE SWITCHER® monolithic integrated circuit designed for flyback, boost, and forward converter applications. It features a fixed 5.0V output voltage with a maximum switch current of 5.0A and a breakdown voltage of 65V. The device operates within an input voltage range of 4V to 40V at a fixed switching frequency of 100 kHz. It utilizes current-mode control for improved transient response and line regulation. Key specifications include a typical efficiency of 90%, a shutdown supply current of 11 mA, and operation over a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Current-mode control architecture provides enhanced input voltage rejection and output negative transient performance.
• Integrated internal soft-start function minimizes inrush current during startup sequences.
• Built-in protection mechanisms include thermal shutdown, cycle-by-cycle current limiting, and undervoltage lockout.

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply architectures
• Battery-powered systems requiring step-up conversion
• Post-regulation stages for standard logic supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., NOPB) against the manufacturer's datasheet to confirm lead-free compliance and exact electrical tolerances. Ensure the TO-263 package variant matches the intended PCB footprint and thermal management requirements. Cross-reference the part number with official Texas Instruments documentation to validate availability status and revision history before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from a wide input voltage range up to 40V. The 5A switch capability supports high-power flyback or boost topologies. Consider the 100 kHz switching frequency for balancing magnetic component size against switching losses. Evaluate thermal dissipation needs based on the TO-263 package and expected load currents.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2587 family of SIMPLE SWITCHER regulators, which are engineered for simplified design of non-isolated and isolated DC-DC converters. The series offers a cost-effective alternative to discrete solutions by integrating the power switch, oscillator, and control logic into a single package, reducing the bill of materials and board space.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587T-5.0/NOPB (TO-220 package equivalent)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum voltage rating for the internal power switch?

The internal NPN power switch has a breakdown voltage rating of 65V.

Does the LM2587S-5.0 support synchronous rectification?

No, the LM2587S-5.0 uses a standard NPN power switch and does not feature synchronous rectification.