LM2585T-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2585T-ADJ is a SIMPLE SWITCHER step-up (boost) regulator from Texas Instruments, designed for flyback converter topologies. It operates with an input voltage range of 4 V to 40 V and delivers a maximum output current of 3 A. The device features a fixed switching frequency of 115 kHz and achieves up to 93% efficiency. It supports adjustable output voltages, typically ranging from 1.23 V to 60 V depending on external components, though specific module configurations may limit this to 12.6 V. The unit is housed in a TO-220 package with five pins, suitable for through-hole mounting, and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current switch capable of delivering 3 A output for robust power handling
• Fixed 115 kHz switching frequency enables the use of compact passive components
• Current-mode control architecture provides rapid transient response and inherent cycle-by-cycle current limiting
• Operates efficiently across a wide input voltage range without requiring shutdown control

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power supplies requiring isolated or non-isolated boost conversion
• Battery-powered systems needing voltage elevation from low cell voltages
• Telecommunications equipment utilizing wide input voltage ranges
• Embedded systems requiring stable regulated outputs from variable sources

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix against the manufacturer datasheet to confirm pinout and thermal characteristics. Ensure the ordering part number matches the required package type, as variations exist between surface mount and through-hole versions. Confirm that the application circuit design accounts for the specific flyback topology requirements associated with this regulator family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple, cost-effective boost solution is needed for moderate current applications up to 3 A. It is appropriate for designs where a fixed switching frequency simplifies electromagnetic interference filtering. Consider alternative packages if board space constraints prohibit the use of the larger through-hole housing.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the SIMPLE SWITCHER family, which integrates power switches and control logic into single monolithic ICs. The LM2585 series specifically targets flyback applications, distinguishing it from standard buck regulators like the LM2576. It represents a mature technology line from Texas Instruments focused on reducing external component count while maintaining reliable performance in industrial environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2586T-ADJ serves as a functional substitute, offering identical electrical specifications but including an additional enable/shutdown pin. Designers must verify that the extra pin does not interfere with existing PCB layouts or that the shutdown functionality can be left unconnected if unused.