LM2587T-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587T-5.0/NOPB is a monolithic integrated circuit from the SIMPLE SWITCHER family, designed for flyback, boost, and forward converter applications. It features a fixed 5.0V output with a maximum input voltage range of 4V to 40V. The device incorporates a 5.0A, 65V NPN power switch and operates at a fixed switching frequency of 100 kHz. Key electrical specifications include a minimum input voltage of 4V, a maximum output current capability of 3A (switch), and an operating temperature range from -40°C to +125°C. It utilizes current mode control for improved transient response and includes internal protection against overcurrent, undervoltage lockout, and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage 5.0A, 65V NPN power switch capable of handling significant load currents in step-up and flyback topologies.
• Employs current mode control architecture to enhance line regulation, load regulation, and loop stability during dynamic load changes.
• Includes built-in soft-start functionality to limit inrush current during startup sequences, reducing stress on input sources.
• Features comprehensive protection mechanisms including thermal shutdown, cycle-by-cycle current limiting, and undervoltage lockout.

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs requiring isolated or non-isolated regulated outputs
• Boost converters for stepping up lower input voltages to higher levels
• Forward converter topologies for medium-power DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per Texas Instruments documentation. Confirm the package type matches the required TO-220-5 through-hole footprint for your PCB layout. Ensure the fixed 5.0V output variant aligns with system voltage requirements, as adjustable versions exist within the same series. Cross-reference the manufacturer part number directly with official TI databases to avoid counterfeit components.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 5V output is required from an input range of 4V to 40V in flyback or boost configurations. The TO-220-5 package provides robust thermal performance for higher current applications compared to surface-mount alternatives. Consider the 100 kHz switching frequency for balancing magnetic component size against efficiency. Current mode control makes it suitable for applications demanding fast transient response without complex compensation networks.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2587T-5.0/NOPB belongs to the LM2587 series of SIMPLE SWITCHER regulators, which are designed for ease of use with minimal external components. This specific part is the through-hole version of the LM2587S series, offering similar electrical characteristics but in a TO-220-5 package. The series is known for integrating the power switch, oscillator, and control logic into a single IC, simplifying the design of buck, boost, and flyback converters.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587T-5.0/NOPB is functionally equivalent to LM2587T-5.0. Verify pin compatibility if substituting with other LM2587 variants such as the SMD LM2587S-5.0/NOPB.