LM2587SX-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587SX-5.0/NOPB is a SIMPLE SWITCHER step-up/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 a 5.0A, 65V NPN power switch and supports a switching frequency of 100 kHz. It includes current-mode control, internal soft-start, and thermal shutdown protection. The component is housed in a TO-263 (D2PAK) surface-mount package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 5.0A, 65V NPN power switch for high-current handling
• Utilizes current-mode control for improved transient response and line regulation
• Includes internal soft-start circuitry to limit inrush current during startup
• Offers comprehensive protection via thermal shutdown, current limiting, and undervoltage lockout

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs requiring wide input voltage ranges
• Step-up (boost) DC/DC conversion applications
• Forward converter topologies
• General-purpose 5V power supply generation from higher voltage rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer origin, as National Semiconductor was acquired by Texas Instruments; parts may bear TI branding or legacy markings. Confirm the 'SX' suffix indicates the specific tape-and-reel packaging variant if required by assembly processes. Ensure the NOPB designation confirms lead-free and RoHS compliance status according to current environmental standards.

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. It is suitable for applications needing up to 5A output current with minimal external components. Consider the TO-263 package for thermal management needs. Compare against the adjustable version (LM2587SX-ADJ/NOPB) if variable output voltage is necessary instead of a fixed rail.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2587 series of SIMPLE SWITCHER regulators, designed for flyback, boost, and forward converter applications. The series is characterized by its simplicity, requiring few external components. The LM2587 family includes variants for different output voltages (3.3V, 5.0V, 12V) and an adjustable option, all sharing the same core 5A switching architecture.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2587S-5.0/NOPB
• LM2587T-5.0/NOPB

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2587SX-5.0/NOPB?

The maximum input voltage is 40V.

Does the LM2587SX-5.0/NOPB include protection features?

Yes, it includes thermal shutdown, current limiting, and undervoltage lockout.