LD1085V36

Overview

The LD1085V36 is a positive low-dropout linear voltage regulator manufactured by STMicroelectronics, belonging to the LD1085 series. It provides a fixed output voltage of 3.6 V with a maximum continuous output current capability of 3 A. The device operates within an input voltage range from 3.4 V to 30 V and features a typical dropout voltage of 1.3 V at full load. Designed for through-hole mounting, it is housed in a TO-220-3 package. The regulator maintains stable performance across an operating temperature range of -40 °C to +125 °C, ensuring reliable power management in various electronic applications.

Feature Summary

• Provides a fixed 3.6 V output voltage with high current delivery capability up to 3 A.
• Features a low dropout voltage characteristic to maintain regulation under varying load conditions.
• Includes internal thermal overload protection and safe area protection for robust operation.

Applications

• Power supplies for embedded systems requiring stable 3.3 V or 3.6 V rails
• Battery-powered equipment needing efficient linear regulation
• Industrial control modules and communication interfaces

Procurement Notes

Verify the specific suffix code on the component marking to confirm the exact output voltage variant, as the LD1085 series includes multiple fixed voltage options. Ensure the procurement specification matches the required package type, typically TO-220 for this part number. Confirm compliance with relevant environmental directives such as RoHS if applicable to your manufacturing process. Cross-reference the manufacturer's latest datasheet to ensure no design changes have affected pin compatibility or electrical characteristics.

Selection Notes

Select the LD1085V36 when a fixed 3.6 V output is required with high current capacity. Consider the input voltage headroom relative to the dropout voltage to ensure proper regulation. Evaluate thermal dissipation requirements based on the expected load current and ambient temperature, as the TO-220 package may require a heatsink for sustained 3 A operation. Compare against adjustable regulators if variable output is needed, but choose this fixed version for simplicity and cost efficiency in standard voltage rail designs.

Part Context

This component is part of the LD1085 family of positive LDO regulators from STMicroelectronics. The series is known for its high current capability and low dropout performance, making it suitable for general-purpose power supply applications. It complements other PMIC offerings by providing a simple, reliable solution for stepping down higher voltages to stable lower levels without the complexity of switching regulators.

Replacement Considerations

Check for direct cross-references from other manufacturers offering 3.6 V, 3 A LDOs in TO-220 packages. Verify that any substitute matches the pinout configuration and electrical specifications, particularly dropout voltage and thermal resistance. Ensure the alternative component meets the same operating temperature range and safety certifications.