LM2585SX-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2585SX-ADJ/NOPB is a SIMPLE SWITCHER step-up (boost) and flyback switching voltage regulator from Texas Instruments. It integrates a 3A current switch, operating with an input voltage range of 4V to 40V. The device supports adjustable output voltages up to 12.6V using external resistors. It features a fixed 52kHz switching frequency and operates within a junction temperature range of -40°C to +125°C. Packaged in TO-263-5 (DDPAK), it offers high efficiency and requires minimal external components for implementation.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3A power switch for high-current step-up and flyback applications
• Supports wide input voltage range from 4V to 40V
• Includes internal compensation and frequency compensation for stable operation
• Features thermal shutdown protection for enhanced reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage boosting
• Industrial control power supplies
• General-purpose DC-DC conversion modules
• Flyback converter designs for isolated outputs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number suffix, typically NOPB for lead-free/RoHS compliance, as variations exist. Confirm the package type is TO-263-5. Ensure the design accounts for the fixed 52kHz switching frequency when selecting external inductors and capacitors. Check for updated datasheets from Texas Instruments regarding any pinout or electrical specification revisions compared to legacy National Semiconductor versions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a simple boost or flyback topology with up to 3A load current. The adjustable output version allows flexibility in setting the target voltage via external feedback resistors. Consider the thermal performance in the TO-263 package, as heat dissipation is critical at higher currents. Verify that the input voltage range covers the minimum battery or supply voltage under all operating conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the SIMPLE SWITCHER family, designed for ease of use with minimal external component count. It serves as a cost-effective solution for medium-power DC-DC conversion needs. The LM2585 series is widely used in industrial and commercial equipment where reliable, efficient voltage regulation is required without complex control circuitry.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2585S-ADJ/NOPB is the direct equivalent part number. LM2587S-ADJ/NOPB offers similar functionality but with a higher 5A current rating. LM2586S-ADJ/NOPB provides comparable performance but includes a shutdown pin feature not present in the standard LM2585.