LM2585S-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2585S-3.3 is a fixed-output step-up switching regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It provides a regulated 3.3 V output with a maximum current capability of 3 A. The device operates over an input voltage range of 4 V to 40 V and supports flyback topology configurations. It features a fixed switching frequency of 115 kHz and achieves up to 93% efficiency. The component is housed in a surface-mount TO-263 (DDPAK-5) package and is rated for operation within a temperature range of -40 °C to +125 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 3 A power switch for high-current step-up applications
• Fixed 115 kHz switching frequency minimizes external component size
• Internal compensation simplifies design requirements
• Supports both boost and flyback converter topologies

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage boosting
• Industrial control power supplies
• Automotive electronics power regulation
• Portable equipment DC-DC conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm the fixed 3.3 V output variant. Ensure the package type matches the required PCB footprint. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the part number with official distributor catalogs to ensure availability and authenticity before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a stable 3.3 V rail is needed from a higher or variable input source. The 3 A output current rating suits moderate load applications. Consider the 115 kHz frequency for balancing efficiency and passive component size. Verify that the input voltage remains within the specified 4 V to 40 V window for proper regulation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2585 series of SIMPLE SWITCHER regulators, designed for efficient DC-DC conversion. The 'S' suffix indicates the surface-mount TO-263 package. The '-3.3' designation specifies the fixed output voltage. This series is widely used in general-purpose power management due to its integrated design and robust performance characteristics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Compatible alternatives include the LM2585SX-3.3-NOPB and LM2585S-3.3/NOPB. These variants share identical electrical specifications and pinouts. Verify package compatibility and thermal performance when substituting.