L387AH

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

The L387AH is a high-performance linear voltage regulator from STMicroelectronics, designed for precision power management applications. It provides a fixed positive output of 5V with a maximum output current capability of 500mA. The device features a very low dropout voltage of 0.8V at full load and supports a maximum input voltage of 26V. It incorporates integrated reset functionality and offers protection against overcurrent and thermal overload conditions. Operating within a temperature range of -40°C to 125°C, it is housed in a robust Pentawatt-5 through-hole package suitable for vertical mounting.

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

• Integrated reset function for system control
• Very low dropout voltage design
• Overcurrent and thermal overload protection
• Fixed 5V positive output regulation

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

• Precision power management systems
• Industrial control circuits
• Embedded system voltage regulation

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

Verify component authenticity as the L387AH is listed as obsolete by major distributors. Confirm availability of surplus stock or alternative sources if immediate procurement is required. Ensure compatibility with existing PCB layouts using the Pentawatt-5 package before sourcing replacements.

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

Select this component when a fixed 5V linear regulation with integrated reset logic is required. The Pentawatt-5 package suits applications needing higher current handling than standard SMD packages. Consider the 0.8V dropout characteristic for efficiency in low headroom scenarios.

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

The L387AH belongs to the L387 family of very low dropout regulators manufactured by STMicroelectronics. It is specifically engineered for applications requiring stable voltage regulation with additional system monitoring capabilities via its reset pin. The part is classified under PMIC linear regulators.

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

Check for direct cross-references from other manufacturers offering identical 5V, 500mA LDOs with reset functions in Pentawatt packages. Verify pinout compatibility and thermal performance characteristics before substituting.