LM2585SX-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM2585SX-3.3 is a SIMPLE SWITCHER step-up (boost) and flyback regulator from Texas Instruments, designed for wide input voltage ranges of 4V to 40V. It delivers a fixed 3.3V output with a maximum current capability of 3A. Operating at a switching frequency of 115kHz, the device integrates a 60V rated NPN power switch. It is housed in a TO-263-5 (DDPAK-7) surface-mount package and supports an operating temperature range from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage 60V rated NPN power switch for robust operation
• Supports both step-up and flyback converter topologies
• Includes internal frequency compensation to minimize external component count
• Features thermal shutdown protection for enhanced reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage boosting
• Industrial control power supplies
• Telecommunications equipment
• Automotive electronics

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering part number matches the required package style and temperature grade. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the manufacturer's latest documentation for any design-in updates or lifecycle notices.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from a variable or higher input source up to 40V. The integrated switch eliminates the need for external power transistors. Consider the 115kHz switching frequency for balancing efficiency and passive component size. Verify that the load current does not exceed the 3A limit under worst-case thermal conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the SIMPLE SWITCHER family, which emphasizes ease of design-in through integrated power switches and minimal external requirements. The LM2585 series provides a cost-effective solution for medium-power DC-DC conversion applications where board space and component count are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include LM2585SX-3.3/NOPB. Verify pinout and thermal performance before substitution.