LM2587T-ADJ/LF03

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587T-ADJ/LF03 is a SIMPLE SWITCHER step-up/flyback regulator from Texas Instruments, housed in a TO-220-5 through-hole package. It supports an input voltage range of 4V to 40V and delivers up to 5A output current. The adjustable output voltage ranges from 1.23V to 50V. Operating at a fixed frequency of 150kHz, it achieves efficiencies exceeding 80%. The device functions within a temperature range of -40°C to +125°C and includes internal soft-start and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated flyback topology supporting both boost and isolated configurations
• Internal compensation network simplifies external component selection
• Built-in soft-start limits inrush current during startup
• Thermal shutdown protects against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power supply systems requiring isolated outputs
• Battery-powered equipment needing voltage step-up
• Telecommunications infrastructure power modules
• General-purpose DC-DC conversion for embedded systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix LF03 against the manufacturer datasheet to confirm lead-free compliance and tape-and-reel or tube packaging details. Ensure the supplier provides valid RoHS certification documents. Confirm availability status as older revisions may be discontinued or subject to long lead times. Cross-reference the ordering information section for exact marking codes.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, high-current flyback solution is required with minimal external parts. The integrated feedback reference allows precise voltage adjustment via a single resistor divider. Consider the thermal performance of the TO-220 package for heat dissipation requirements. Verify that the 150kHz switching frequency aligns with EMI constraints and inductor size preferences for the target application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2587 SIMPLE SWITCHER family, designed for simplified power supply design. It complements lower-current variants like the LM2586 (3A) and higher-feature models like the LM2588 (with shutdown). The TO-220 package distinguishes it from surface-mount versions like the LM2587S, offering easier prototyping and higher thermal capacity for through-hole PCB layouts.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587T-ADJ/NOPB: Direct equivalent with updated environmental compliance. LM2587T-5.0: Fixed 5V output variant if adjustment is not needed. LM2587T-12: Fixed 12V output option. LM2588T-ADJ: Similar performance but includes an enable/shutdown pin for control logic integration.