LX8386B-00CDD

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LX8386B-00CDD is a positive linear regulator IC from the LX8386 series, manufactured by Microsemi Corporation. It provides an adjustable output voltage with a nominal reference of 1.25V and supports a minimum output current of 1.5A. The device features a maximum dropout voltage of 1.3V at full load and operates down to a 1V input-to-output differential. It offers high initial accuracy of 0.8% and line/load regulation of 0.015%/0.1%. Designed for commercial applications, it functions within a temperature range of 0°C to +125°C and utilizes a Plastic TO-263 (D-Pak) surface-mount package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Provides 1.5A output current with guaranteed low dropout performance of 1.3V maximum at full load.
• Features on-chip trimming for tight initial accuracy of 0.8% and superior thermal stability.
• Includes internal protection mechanisms such as short circuit protection, safe operating area limits, and thermal shutdown.
• Pin-compatible with earlier three-terminal regulators like the 78xx series for easy design upgrades.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• High efficiency linear power supplies
• Post-regulators for switching power supplies
• Battery charger circuits
• Constant current regulators
• ASIC and low voltage integrated circuit supplies

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify that the specific part number corresponds to the commercial temperature grade (0°C to +125°C) and the D-Pak surface-mount package configuration. Confirm the 'B' suffix indicates the 0.8% accuracy variant rather than standard tolerance. Ensure the supplier documentation matches the manufacturer's latest revision history, as older datasheets may list Linfinity Microelectronics as the original source before corporate acquisitions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a low-cost, pin-compatible replacement for legacy 3-terminal regulators is required in space-constrained designs. The D-Pak package facilitates automated surface-mount assembly while maintaining adequate thermal dissipation for moderate power levels. Choose this model over the industrial grade if the application environment remains strictly within commercial temperature limits, ensuring optimal cost-efficiency without compromising the 1.5A current capability or low dropout characteristics.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This regulator belongs to the LX8386 family, which includes fixed voltage options and varying accuracy grades. The LX8386B specifically denotes the highest precision tier within the series, offering tighter tolerances compared to the standard LX8386 or LX8386A variants. The series was originally developed by Linfinity Microelectronics before being acquired by Microsemi, representing a transition in product lineage for these established linear regulator components.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct pin-compatible replacements include the LX8386A-00CDD and LX8386-00CDD, though they offer lower accuracy and potentially different dropout specifications. Surface-mount equivalents in other packages are not directly listed as interchangeable without layout modifications.