LM2587T-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587T-3.3 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 3.3V output. The device integrates a 5.0A, 65V NPN power switch with current-mode control, internal soft-start, and protection circuits including over-current, undervoltage lockout, and thermal shutdown. Operating at a 100 kHz switching frequency, it utilizes TO-220-5 packaging.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 5.0A, 65V NPN power switch for high-current handling
• Supports flyback, boost, and forward converter topologies
• Includes internal soft-start to reduce inrush current during startup
• Provides comprehensive protection via over-current, undervoltage lockout, and thermal shutdown

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs
• Boost converter architectures
• Forward converter systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches the required TO-220-5 form factor. Confirm the suffix indicates the fixed 3.3V output variant. Ensure compatibility with the intended flyback or boost topology. Check for RoHS compliance status if environmental regulations apply. Validate supplier authenticity through authorized channels.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring up to 5A output current with a wide input voltage range. Suitable for designs needing integrated protection and current-mode control. Ideal for space-constrained systems due to 100 kHz operation allowing smaller magnetic components. Consider thermal management requirements for the TO-220 package.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the LM2587 SIMPLE SWITCHER family, which includes adjustable and other fixed voltage variants. Designed as a monolithic integrated circuit for versatile power conversion needs. Shares core architecture with LM2587S and LM2587T series, differing primarily in package style and output configuration.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587T-ADJ/NOPB offers adjustable output voltage within the same family. LM2587S-3.3/NOPB provides identical electrical performance in a surface-mount TO-263 package. Verify pinout compatibility and thermal characteristics when substituting between through-hole and surface-mount variants.